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Water Quality Samples for USA
Grouped by County

! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024
with a full decommission expected 6 months later. Learn more about the upcoming change and where to find the new samples data in our blog.
Some complex retrievals may take a few minutes.

Site Selection Results -- 644 sites found


Hydrologic unit = 21010005
Minimum number of samples = 1

Save file of selected sites to local disk for future upload

Data for individual sites can be obtained by selecting the site number below

  group icon Aguas Buenas Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181527066060300 PURITANA 3 WELL, AGUAS BUENAS, PR 1961-06-01 1961-06-01 1
USGS 181528066060200 PURITANA 2 WELL, AGUAS BUENAS, PR 1961-06-01 1961-06-01 1
USGS 181529066060100 PURITANA 1 WELL, AGUAS BUENAS, PR 1961-06-01 1961-06-01 1
USGS 50047600 RIO DE BAYAMON NR AGUAS BUENAS, PR 1958-09-16 2012-08-15 213
USGS 50047880 RIO GUAYNABO NR AGUAS BUENAS, PR 1976-05-21 1976-06-01 3
USGS 50055097 QUEBRADA SANJELO AT HWY 777, PR 2014-08-06 2015-03-11 2
USGS 50055100 RIO CAGUITAS NR AGUAS BUENAS, PR 1995-10-27 2000-09-22 82
  group icon Aibonito Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180752066142600 GON SPRING, AIBONITO, PR 1961-07-13 1961-07-13 1
USGS 180756066164000 ASOMANTE OLD WELL, AIBONITO, PR 1959-10-16 1966-04-27 3
USGS 180824066164400 BARRIO PASTOS 1 WELL, AIBONITO, PR 1964-05-08 1964-05-08 1
USGS 180836066164200 BARRIO PASTOS 2 WELL, AIBONITO, PR 1964-06-10 1964-06-10 1
USGS 50043000 RIO DE LA PLATA AT PROYECTO LA PLATA, PR 1959-02-20 2024-02-20 416
  group icon Barranquitas Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 50030280 RIO CANABON NR BOTIJAS, PR 1972-01-30 1973-06-29 7
  group icon Bayamon Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182129066115900 AYA WELL, BAYAMON, PR 1985-04-19 1985-04-19 1
USGS 182144066115400 COTTE WELL, BAYAMON, PR 1985-04-19 1985-04-19 1
USGS 182308066083300 MITEL WELL, BAYAMON, PR 1983-05-13 1988-06-24 3
USGS 182335066082000 BAYAMON 6 WELL, BAYAMON, PR 1964-03-12 1964-03-14 3
USGS 182358066082100 VLCAR WELL, BAYAMON, PR 1958-05-06 1958-05-06 1
USGS 182436066085500 FORT BUCHANAN 2 WELL, BAYAMON, PR 1950-05-08 1952-02-28 2
USGS 182441066082600 BUCHANAN PARK WELL, BAYAMON, PR 2003-03-10 2008-05-16 7
USGS 182444066083400 FBUC 3 WELL, BAYAMON, PR 1950-05-08 1952-02-28 3
USGS 182447066084100 FBUC 4 WELL, BAYAMON, PR 1950-05-08 1953-03-16 4
USGS 182451066080200 PIEZOMETER FORT BUCHANAN 1, BAYAMON, PR 2003-03-10 2008-05-16 7
USGS 182454066085300 EDM WELL, BAYAMON, PR 1965-04-02 1965-04-02 1
USGS 182455066080700 FBUC 7 WELL, BAYAMON, PR 1950-05-08 1952-02-28 3
USGS 182503066104300 RIO PLANTATION 3A WELL, BAYAMON, PR 1972-05-02 1972-05-02 1
USGS 50044220 RIO DE LA PLATA NR NARANJITO, PR 1976-05-21 1976-06-01 4
USGS 50047000 RIO DE LA PLATA NR TOA ALTA, PR 1959-02-23 1962-09-13 2
USGS 50047800 RIO DE BAYAMON AT DAMSITE NR AGUAS BUENAS, PR 1958-09-16 1992-06-08 13
USGS 50047820 RIO DE BAYAMON AT HWY 174 NR BAYAMON, PR 1958-03-21 2024-02-22 60
USGS 50047850 RIO DE BAYAMON NR BAYAMON, PR 1964-09-03 1971-04-05 36
USGS 50048000 RIO DE BAYAMON AT BAYAMON, PR 1959-01-27 1974-10-23 87
USGS 50048500 RIO DE BAYAMON AT HWY 167 AT BAYAMON, PR 1960-03-28 1975-02-05 28
USGS 50048510 RIO DE BAYAMON AT FLOOD CHANNEL AT BAYAMON, PR 1973-09-12 2024-02-05 256
  group icon Caguas Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181046066024700 DEL WELL, CAGUAS, PR 1987-07-09 1990-08-02 2
USGS 181116066004900 JJAN WELL, CAGUAS, PR 1962-12-14 1962-12-14 1
USGS 181307066002000 JJAN SPRING, CAGUAS, PR 1954-06-28 1954-06-28 1
USGS 181311066013900 MAN 1 WELL, CAGUAS, PR 1963-04-27 1963-04-27 1
USGS 181311066022500 PIEZOMETER CAGUAS-JUNCOS 11, CAGUAS, PR 2003-02-20 2008-05-16 9
USGS 181318066032600 PIEZOMETER CJ 12, CAGUAS, PR 1990-08-08 1990-08-08 1
USGS 181332066022100 RDIE WELL, CAGUAS, PR 1990-07-30 1990-07-30 1
USGS 181351066013900 PIEZOMETER CJ 13, CAGUAS, PR 1990-08-06 1990-08-06 1
USGS 181352066025300 PIEZOMETER CAGUAS-JUNCOS 19A, CAGUAS, PR 1990-07-19 2008-05-14 10
USGS 181406066004600 PIEZOMETER CJ 7, CAGUAS, PR 1987-08-11 1990-08-09 2
USGS 181422066015300 PIEZOMETER CJ 2, CAGUAS, PR 1990-09-11 1996-04-01 2
USGS 181444066035000 CAR 2 WELL, CAGUAS, PR 1987-07-01 1990-08-30 2
USGS 181445066011500 PIEZOMETER CJ 1, CAGUAS, PR 1987-08-11 1990-08-07 2
USGS 181446066013400 PIEZOMETER CJ 20, CAGUAS, PR 1990-07-11 2004-02-09 2
USGS 181454066022400 QEELE WELL, CAGUAS, PR 1987-07-01 1987-07-01 1
USGS 181503066041500 LAS FLORES WELL, CAGUAS, PR 1972-06-01 1972-06-01 1
USGS 181538066022500 BAIROA B WELL, CAGUAS, PR 1967-08-01 1967-08-01 1
USGS 181539066014500 PIEZOMETER CAGUAS-JUNCOS 15, CAGUAS, PR 2003-02-20 2008-05-16 9
USGS 181544066013901 CAGUAS REGIONAL WWTP EFFLUENT 2013-03-18 2013-03-18 1
USGS 181645066021600 EPER WELL, CAGUAS, PR 1963-04-27 1963-04-27 1
USGS 181653066021700 YITURE WELL, CAGUAS, PR 1963-01-23 1963-01-23 1
USGS 50052795 QUEBRADA JANER AT BO. TOMAS DE CASTRO, PR 2014-08-05 2015-03-10 2
USGS 50052850 QUEBRADA LAS BAMBUAS AT BO. TOMAS DE CASTRO, PR 2014-08-05 2015-03-10 2
USGS 50052860 QUEBRADA LAS BAMBUAS NR CAGUAS, PR 2015-03-10 2015-03-10 1
USGS 50052925 RIO TURABO AT BO. SAN SALVADOR, PR 2014-08-04 2015-03-09 2
USGS 50052935 QUEBRADA MORENA AT BO. SAN SALVADOR, PR 2014-08-05 2015-03-09 2
USGS 50052950 QUEBRADA MARACAI AT BO. SAN SALVADOR, PR 2014-08-04 2015-03-09 2
USGS 50052975 RIO TURABO NR BO. SAN SALVADOR, PR 2014-08-04 2015-03-09 2
USGS 50053025 RIO TURABO ABV BORINQUEN, PR 1995-10-21 2015-03-09 45
USGS 50053050 RIO TURABO AT BORINQUEN, PR 1984-05-30 2005-08-08 3
USGS 50053060 RIO TURABO AT HWY 765 AT BO. BORINQUEN, PR 2014-08-04 2015-03-09 2
USGS 50053070 TRIBUTARIO DE RIO TURABO AT HWY 765 AT BORINQUEN 2014-08-04 2015-03-09 2
USGS 50053080 QUEBRADA NARANJITO AT BO. BORINQUEN, PR 2014-08-04 2015-03-09 2
USGS 50053150 QUEBRADA SONADORA AT BO. BEATRIZ, PR 2014-08-04 2015-03-09 2
USGS 50053200 QUEBRADA BEATRIZ AT BO. BEATRIZ, PR 2014-08-04 2015-03-09 2
USGS 50053250 TRIBUTARIO DE QDA BEATRIZ AT HWY 765 AT BORINQUEN 2014-08-04 2015-03-09 2
USGS 50053925 QDA DE LAS QUEBRADILLAS AT DIVISORIA AT BO BEATRIZ 2014-08-05 2015-03-10 2
USGS 50053950 QUEBRADA DE LAS QUEBRADILLAS AT BO. BEATRIZ, PR 2014-08-05 2015-03-10 2
USGS 50053975 QDA DE LAS QUEBRADILLAS ABV DAM AT BO. TURABO, PR 2014-08-05 2015-03-10 2
USGS 50054020 QUEBRADA DE LAS QUEBRADILLAS AT HIGHWAY 1, PR 2005-03-08 2015-03-10 4
USGS 50054050 QDA DE LAS QUEBRADILLAS NR MOUTH AT BO. TURABO, PR 2014-08-05 2015-03-10 2
USGS 50054100 RIO TURABO AT BO. TURABO, PR 2014-08-05 2015-03-10 2
USGS 50054300 RIO TURABO AT VILLA DEL REY NR CAGUAS, PR 2014-08-05 2015-03-10 2
USGS 50054450 TRIBUTARY OF RIO TURABO NR TOMAS DE CASTRO, PR 2014-08-05 2015-03-11 2
USGS 50054500 RIO TURABO AT CAGUAS, PR 1958-03-14 2024-02-14 62
USGS 50055000 RIO GRANDE DE LOIZA AT CAGUAS, PR 1959-02-25 2024-02-14 603
USGS 50055120 RIO CAGUITAS AT HWY 156 NR CAGUAS, PR 2005-03-08 2015-03-11 4
USGS 50055130 QUEBRADA ALGARROBO AT BO. CANABON, PR 2014-08-06 2015-03-11 2
USGS 50055132 TRIBUTARY OF QUEBRADA ALGARROBO AT MOUTH, PR 2015-03-11 2015-03-11 1
USGS 50055135 QUEBRADA ALGARROBO AT MOUTH AT BO. CANABON, PR 2014-08-06 2015-03-11 2
USGS 50055150 RIO CANABONCITO AT BO. CANABONCITO, PR 2014-08-06 2015-03-11 2
USGS 50055160 RIO CANABONCITO NR MOUTH AT BO. CANABONCITO, PR 2014-08-06 2015-03-11 2
USGS 50055170 RIO CAGUITAS NR CAGUAS, PR 1995-11-04 2015-03-13 20
USGS 50055180 UNNAMED CREEK AT VILLA DEL REY, PR 2014-08-07 2015-03-13 2
USGS 50055190 UNNAMED CREEK AT HIGHWAY 156 NR CAGUAS, PR 2014-08-07 2015-03-12 2
USGS 50055195 TRIBUTARY OF UNNAMED CREEK AT HWY 156, PR 2014-08-07 2015-03-12 2
USGS 50055200 RIO CAGUITAS AT CAGUAS, PR 1958-03-19 1977-06-17 11
USGS 50055225 RIO CAGUITAS AT VILLA BLANCA AT CAGUAS, PR 1992-01-11 2000-09-18 66
USGS 50055250 RIO CAGUITAS AT HWY 30 AT CAGUAS, PR 1973-09-25 2024-02-12 261
USGS 50055330 RIO BAIROA AT BO. BAIROA NR CAGUAS, PR 2014-08-07 2015-03-12 2
USGS 50055335 RIO BAIROA BELOW LAS CAROLINAS, PR 2014-08-07 2015-03-12 2
USGS 50055390 RIO BAIROA AT BAIROA, PR 1995-10-19 2000-09-02 58
USGS 50055400 RIO BAIROA NR CAGUAS, PR 1958-03-19 2015-03-13 174
USGS 50055404 TRIBUTARIO DE RIO BAIROA AT HWY 1 NR CAGUAS, PR 2014-08-07 2015-03-11 2
USGS 50055408 TRIBUTARY OF RIO BAIROA AT HWY 796 NR CAGUAS, PR 2014-08-06 2015-03-11 2
USGS 50055410 RIO BAIROA AT MOUTH, PR 1987-07-24 2024-02-12 82
USGS 50057700 LAGO LOIZA STATION NO. 4A, PR 1973-12-13 1974-05-30 5
USGS 50057800 RIO CANAS AT BO. JAGUEYES NR RIO CANAS, PR 2014-08-08 2015-03-13 2
USGS 50058000 RIO CANAS NR CAGUAS, PR 1966-04-12 1966-04-12 1
USGS 50058010 RIO CANAS AT HWY 1 AT BO. RIO CANAS, PR 2014-08-08 2015-03-12 2
USGS 50058300 QUEBRADA ARENA NR CAGUAS, PR 1958-03-19 2015-03-13 8
USGS 50058350 RIO CANAS AT RIO CANAS, PR 1995-10-17 2015-08-04 89
USGS 50058375 TRIBUTARIO DE RIO CANAS AT HWY 798 AT BO RIO CANAS 2014-08-08 2015-03-12 2
USGS 50058395 TRIBUTARY OF TRIB OF RIO CANAS AT HWY 798, PR 2014-08-08 2015-03-12 2
USGS 50058400 RIO CANAS ABV LAGO LOIZA, PR 1973-11-16 1974-10-01 26
USGS 50058610 TRIBUTARIO DE LAGO LOIZA AT HWY 175 AT SAN ANTONIO 2014-08-08 2015-03-12 2
  group icon Canovanas Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 50061510 RIO CANOVANILLAS DOWNSTREAM OF HIGHWAY 3, PR 2005-03-10 2015-07-27 15
USGS 50061820 RIO CANOVANAS AT HATO PUERCO, PR 2005-03-09 2005-08-02 2
USGS 50061910 RIO CANOVANAS AT BARRIO CANOVANAS, PR 2005-03-09 2015-07-27 15
  group icon Carolina Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181824065562800 BARRAZAS WELL, CAROLINA, PR 1979-03-04 1979-03-04 1
USGS 182301065582500 JARDINES DE CAROLINA WELL, CAROLINA, PR 1977-04-26 1977-04-26 2
USGS 182359065570700 PBEA WELL, CAROLINA, PR 1965-02-10 1965-02-10 1
USGS 182401065581400 VILLA FONTANA 2 WELL, CAROLINA, PR 1977-08-10 1980-01-15 3
USGS 182426065573800 CFAR WELL, CAROLINA, PR 1965-02-09 1965-02-09 1
USGS 182439065580800 ALVZ 1 WELL, CAROLINA, PR 1961-10-09 1961-10-09 1
USGS 182515065594100 PIEZOMETER CAMPO RICO 1, CAROLINA, PR 2003-04-03 2011-10-18 10
USGS 182540066011300 LAGUNA SAN JOSE 5, CAROLINA, PR 1986-10-15 1986-10-15 1
USGS 182637066023500 LAGUNA SAN JOSE 1, CAROLINA, PR 1986-10-15 1986-10-15 1
USGS 50049720 LAGUNA SAN JOSE NO. 3 AT SAN JUAN, PR 1973-12-03 2005-06-16 122
USGS 50049745 LAGUNA GARDENS 1995-03-16 1995-07-20 3
USGS 50049755 SJ5300 1994-12-15 2005-06-16 45
USGS 50050105 QDA SAN ANTON NR URB. COUNTRY CLUB, CAROLINA PR 2002-02-25 2005-06-21 18
USGS 50050300 QUEBRADA BLASINA NR CAROLINA, PR 1973-09-18 2024-02-27 259
USGS 50050335 LAGUNA PINONES NO. 3 NR CAROLINA, PR 1973-12-03 1996-08-30 56
USGS 50050338 PINONES IRRIGATION 1995-03-16 1995-07-20 3
USGS 50050340 LAGUNA PINONES NO. 2 NR CAROLINA, PR 1973-12-03 2005-06-20 37
USGS 50050341 LAGUNA PINONES NO. 01, PR 1993-11-02 1996-08-30 17
USGS 50050357 TRC200 1994-12-15 1995-07-18 13
USGS 50050358 SAN JUAN VORTAC 1995-03-16 1995-07-20 3
USGS 50060000 RIO GRANDE DE LOIZA ABV CAROLINA, PR 1976-05-24 1976-06-02 3
USGS 50061000 RIO GRANDE DE LOIZA AT CAROLINA, PR 1958-03-20 1993-07-02 12
USGS 50061160 RIO CANOVANILLAS AT BARRIO CEDRO, PR 2005-03-09 2005-08-02 2
USGS 50061300 RIO CANOVANILLAS NR LOIZA, PR 1966-04-16 1973-10-09 32
USGS 50061500 RIO CANOVANILLAS AT LOIZA, PR 1958-03-20 1966-04-15 10
  group icon Catano Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182542066090300 VAQUERIA WELL, CATANO, PR 1965-04-02 1965-04-02 1
USGS 182554066085900 BAC 2 WELL, CATANO, PR 1965-04-02 1965-04-02 1
USGS 182654066090800 WFUE WELL, CATANO, PR 1994-08-31 1994-08-31 1
USGS 50047530 RIO HONDO AT FLOOD CHANNEL NR CATANO, PR 1979-12-06 2015-08-13 160
USGS 50048620 BAHIA DE SAN JUAN NO. 1 AT SAN JUAN, PR 1973-12-05 1995-05-18 25
USGS 50048630 BAHIA DE SAN JUAN NO. 2 AT SAN JUAN, PR 1972-02-20 1995-07-19 17
  group icon Cayey Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180417066083200 CASILLA GOBERNADOR SPRING, CAYEY, PR 1959-09-11 1959-09-11 1
USGS 180508066092300 PLUN SPRING, CAYEY, PR 1961-07-12 1961-07-12 1
USGS 180552066125300 EPVIE WELL, CAYEY, PR 1978-12-01 1978-12-01 1
USGS 180608066102700 LA BOMBA SPRING, CAYEY, PR 1961-06-09 1961-06-09 1
USGS 180640066100600 MUNOZ RIVERA WELL, CAYEY, PR 1959-05-25 1959-05-25 1
USGS 180649066095500 MINIMA WELL, CAYEY, PR 1959-05-14 2008-05-16 10
USGS 180654066092400 USA 2 WELL, CAYEY, PR 1950-05-11 1959-05-28 10
USGS 180659066092400 USA 1 WELL, CAYEY, PR 1952-03-04 1953-03-18 2
USGS 180707066093800 USA 7 WELL, CAYEY, PR 1950-05-11 1953-03-18 4
USGS 180708066094800 USA 5 WELL, CAYEY, PR 1950-05-11 1952-03-18 4
USGS 180708066095001 USA 4 WELL, CAYEY, PR 1950-05-11 1953-03-18 4
USGS 50042500 RIO DE LA PLATA AT MATON ABAJO 2012-11-19 2024-02-20 48
USGS 50042800 RIO MATON AT HWY 14 AT MATON ABAJO, PR 2012-11-19 2024-02-20 46
  group icon Ceiba Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181347065403800 ARI WELL, CEIBA, PR 1962-04-26 1962-04-26 1
USGS 181503065385800 CEIBA 20 WELL, CEIBA, PR 1945-11-08 1945-11-08 1
USGS 181530065384400 CEIBA 16 WELL, CEIBA, PR 1945-11-08 1945-11-08 1
USGS 181600065382700 CEIBA 12 WELL, CEIBA, PR 1945-11-08 1945-11-08 1
USGS 50070700 UNNAMED CREEK NR RIO ABAJO, PR 2005-07-19 2010-08-17 3
USGS 50072775 QUEBRADA CEIBA NR CEIBA, PR 2005-07-19 2010-08-16 3
USGS 50072810 QUEBRADA CEIBA AT HWY 979 NR CEIBA, PR 2005-07-21 2015-07-29 9
USGS 50072875 QUEBRADA AGUAS CLARAS AT AGUAS CLARAS, PR 2005-07-21 2010-08-17 3
USGS 50072900 QUEBRADA AGUAS CLARAS NR CEIBA, PR 2005-07-21 2010-08-17 3
USGS 50072940 LAGUNA CEIBA NO.1 CEIBA PR 2011-11-04 2012-08-07 8
USGS 50072950 LAGUNA CEIBA NO.2, CEIBA PR 2011-11-04 2012-08-07 8
USGS 50072975 STORMWATER STATION AT NSRR CEIBA, PR 1999-01-22 2023-09-23 17
USGS 50073100 RIO DAGUAO NR DAGUAO, PR 2005-07-21 2010-08-18 3
USGS 50073225 RIO DAGUAO AT LA ESPERANZA, PR 2005-07-21 2015-07-31 9
USGS 50073275 UNNAMED CREEK NR CEIBA, PR 2005-03-23 2010-08-17 4
  group icon Ciales Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181736066302900 PESAS CIALES METEOROLOGICAL STATION, CIALES, PR 1996-05-01 2000-12-01 30
  group icon Cidra Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181114066085700 TUGWELL, 1 WELL, CIDRA, PR 1992-12-09 1992-12-09 1
USGS 50040800 RIO DE LA PLATA AT CAYEY, PR 1958-03-26 1965-02-04 9
USGS 50047535 RIO DE BAYAMON AT ARENAS, PR 1992-11-10 1994-02-04 184
USGS 50047537 LAGO DE CIDRA NR RIO BAYAMON MOUTH, PR 1993-01-26 2002-07-19 55
USGS 50047542 RIO DE LA PLATA INTRABASIN FLOW, PR 1992-11-12 1993-12-16 32
USGS 50047543 LAGO DE CIDRA NR RIO SABANA MOUTH, PR 1992-07-27 1995-05-26 15
USGS 50047545 QUEBRADA PRIETA NR CIDRA, PR 1992-11-03 1994-02-03 140
USGS 50047547 LAGO DE CIDRA NR QUEBRADA PRIETA MOUTH, PR 1992-11-30 1995-05-26 17
USGS 50047549 LAGO DE CIDRA NR DAMSITE, PR 1992-07-28 2002-07-19 63
USGS 50047550 LAGO CIDRA AT DAMSITE NEAR CIDRA, PR 1992-07-27 1993-07-12 30
USGS 50047560 RIO DE BAYAMON BLW LAGO DE CIDRA DAM, PR 1993-04-07 2000-08-23 74
USGS 50053900 QDA DE LAS QUEBRADILLAS AT BO. BAYAMON, CIDRA PR 1993-03-24 1993-04-02 2
  group icon Comerio Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181307066133500 PINAS 1 WELL, COMERIO, PR 1959-06-29 1968-01-10 5
USGS 50043575 RIO HONDO AT HWY 776 AT RIO HONDO, PR 1998-03-20 1998-06-16 4
USGS 50043800 RIO DE LA PLATA AT COMERIO, PR 1995-10-03 2004-11-12 61
USGS 50043998 RIO ARROYATA AT MOUTH NR COMERIO, PR 2012-11-20 2024-02-21 45
USGS 50044000 RIO DE LA PLATA NR COMERIO DAMSITE AT HWY 156, PR 1958-03-26 2024-02-21 227
  group icon Dorado Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182526066165001 PIEZOMETER SANTA ROSA 2 DORADO, PR 2003-02-21 2008-04-18 7
USGS 182548066161300 DDAI WELL, DORADO, PR 1982-10-26 1982-10-26 1
USGS 182548066164401 PIEZOMETER MAGUAYO 2 DORADO, PR 2003-02-24 2008-04-21 4
USGS 182620066163403 PIEZOMETER HIGUILLAR 4 DORADO, PR 2003-04-29 2008-04-21 5
USGS 182630066172800 SAN CARLOS WELL, DORADO, PR 2011-08-30 2014-10-28 2
USGS 50046000 RIO DE LA PLATA AT HWY 2 NR TOA ALTA, PR 1958-03-26 2024-02-14 645
  group icon Fajardo Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181706065420400 PIEZOMETER USGS RF 1, FAJARDO, PR 1994-11-10 1994-11-10 1
USGS 181744065413700 PIEZOMETER USGS RF 2, FAJARDO, PR 1994-11-16 1994-11-16 1
USGS 181802065383800 PIEZOMETER USGS RF 17, FAJARDO, PR 1994-12-08 1994-12-08 1
USGS 181806065395900 PIEZOMETER USGS RF 9, FAJARDO, PR 1994-11-17 1994-11-17 1
USGS 181819065391300 PIEZOMETER USGS RF 16, FAJARDO, PR 1994-12-15 1994-12-15 1
USGS 181840065393100 PIEZOMETER USGS RF 6, FAJARDO, PR 1994-12-06 1994-12-06 1
USGS 181847065391301 RIO FAJARDO BELOW FAJARDO WWTP OUTFALL 2013-03-25 2013-03-25 4
USGS 181854065384600 PIEZOMETER USGS RF 14, FAJARDO, PR 1994-10-26 1994-10-26 1
USGS 181901065394000 PIEZOMETER USGS RF 7, FAJARDO, PR 1994-11-15 1994-11-15 1
USGS 181917065382701 PIEZOMETER RIO FAJARDO 12 FAJARDO, PR 2003-04-04 2008-04-04 5
USGS 181934065385400 FESA FAJARDO 1 WELL, FAJARDO, PR 1960-07-01 1960-07-01 1
USGS 181942065385300 PIEZOMETER USGS RF 15, FAJARDO, PR 1994-11-14 1994-11-14 1
USGS 182017065395700 GRAM WELL, FAJARDO, PR 1961-02-24 1961-02-24 1
USGS 182037065381000 PROB F2 WELL, FAJARDO, PR 1962-04-25 1962-04-25 1
USGS 182048065400300 ZAL 1 WELL, FAJARDO, PR 1962-04-25 1962-04-25 1
USGS 182056065403400 JMAR WELL, FAJARDO, PR 1962-04-25 1962-04-25 1
USGS 182058065391600 AND 2 WELL, FAJARDO, PR 1945-11-07 1961-02-21 2
USGS 182113065393300 PIEZOMETER QF 1, FAJARDO, PR 1994-12-12 1994-12-12 1
USGS 182127065385800 SOT WELL, FAJARDO, PR 1945-11-07 1945-11-07 1
USGS 182146065384800 SSAN WELL, FAJARDO, PR 1962-04-25 1962-04-25 1
USGS 50069300 TRIBUTARY TO RIO JUAN MARTIN AT HWY 3, PR 1995-02-09 1995-02-09 1
USGS 50069390 QUEBRADA FAJARDO AT HWY 3 ABV CULVERT, PR 2005-07-19 2010-08-19 3
USGS 50069400 QUEBRADA FAJARDO AT HWY 194, PR 1995-02-09 2010-08-19 4
USGS 50069410 QUEBRADA FAJARDO AT CONVENTO, PR 2005-07-19 2010-08-19 3
USGS 50069500 LAGUNA AGUAS PRIETAS NO.2 FAJARDO PR 2011-11-03 2012-08-06 10
USGS 50069550 LAGUNA AGUAS PRIETAS NO.1 FAJARDO PR 2011-11-03 2012-08-06 10
USGS 50069600 LAGUNA GRANDE STATION NUMBER 8 2006-03-29 2012-08-06 40
USGS 50069610 LAGUNA GRANDE STATION NUMBER 7 2006-03-29 2006-09-26 8
USGS 50069620 LAGUNA GRANDE STATION NUMBER 6 2006-03-29 2012-08-06 38
USGS 50069630 LAGUNA GRANDE STATION NUMBER 4 2006-03-29 2006-09-26 8
USGS 50069640 LAGUNA GRANDE STATION NUMBER 5 2006-03-29 2006-09-26 4
USGS 50069650 LAGUNA GRANDE STATION NUMBER 3 2006-03-29 2006-09-26 4
USGS 50069660 LAGUNA GRANDE STATION NUMBER 1 2006-03-29 2006-09-26 8
USGS 50069670 LAGUNA GRANDE STATION NUMBER 2 2006-03-29 2006-09-26 8
USGS 50070500 RIO FAJARDO ABV FAJARDO, PR 1996-10-28 2000-09-16 55
USGS 50070905 RIO FAJARDO BLW RIO FAJARDO DAM INTAKE, PR 2005-07-19 2010-08-17 3
USGS 50071000 RIO FAJARDO NR FAJARDO, PR 1961-02-21 2012-08-16 535
USGS 50071190 UNNAMED CREEK AT ESTANCIAS DE SAN PEDRO, PR 2005-07-19 2010-08-17 3
USGS 50071195 QUEBRADA TRIBUTARIA DEL RIO FAJARDO AT VAPOR, PR 2005-09-15 2010-08-17 3
USGS 50071950 QUEBRADA SAN PEDRO AT SAN PEDRO, PR 2005-07-19 2010-08-19 3
USGS 50072000 RIO FAJARDO AT FAJARDO, PR 1958-09-11 2010-08-18 81
USGS 50072500 RIO FAJARDO BLW FAJARDO, PR 1974-04-02 2024-02-13 217
USGS 50072605 QUEBRADA MATA REDONDA NR SANTA RITA, PR 2005-07-19 2010-08-17 3
USGS 50072690 RIO DEMAJAGUA NR MACHOS, PR 2005-07-19 2010-08-17 3
USGS 50072700 RIO DEMAJAGUA AT DEMAJAGUA, PR 1995-02-13 2015-07-29 10
  group icon Guayama Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180001066122002 PIEZOMETER AGUIRRE HW 3C, GUAYAMA, PR 1988-06-13 1988-06-17 3
USGS 180049066120500 MANGO 1 WELL, GUAYAMA, PR 1960-10-13 1960-10-13 1
  group icon Guaynabo Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182450066072000 FBUC 5 WELL, GUAYNABO, PR 1950-05-08 1950-05-08 1
USGS 182510066070800 PRCEM 2 WELL, GUAYNABO, PR 1956-01-10 1956-01-10 1
USGS 182528066065200 USGS CFWSC GUAYANABO PR LAB 2022-08-18 2023-07-28 3
USGS 182531066075900 PIEZOMETER BLDG 652 GUAYNABO, PR 2004-02-06 2008-04-02 3
USGS 182532066065801 USGS BLDG 652 WELL, GUAYNABO, PR 1958-05-01 1984-07-01 233
USGS 182533066064500 FORT BUCHANAN NC-1 WELL, GUAYNABO, PR 1986-04-30 1986-05-02 2
USGS 50047890 RIO GUAYNABO AT LA MUDA NR GUAYNABO, PR 1974-08-15 1974-12-06 3
USGS 50047895 RIO GUAYNABO AT HWY 836 NR GUAYNABO, PR 1974-08-15 1979-08-24 33
USGS 50047950 RIO GUAYNABO AT HWY 833 AT GUAYNABO, PR 1960-03-28 1966-04-13 9
USGS 50047953 RIO GUAYNABO BLW GUAYNABO, PR 1959-02-22 1959-02-22 1
USGS 50047990 RIO GUAYNABO NR BAYAMON, PR 1971-03-16 2024-02-05 226
USGS 50048565 QUEBRADA SANTA CATALINA NEAR GUAYNABO, PR 2009-03-24 2023-08-30 50
USGS 50048570 LAS CASAS LAKE AT FORT BUCHANAN, GUAYNABO, PR 2020-09-01 2023-08-31 6
USGS 50048580 UNNAMED CREEK AT FORT BUCHANAN, GUAYNABO, PR 2009-03-24 2023-08-30 55
USGS 50049600 QUEBRADA MARGARITA AT QUEBRADA HEIGHTS, PR 1972-09-21 1976-06-03 8
USGS 50999999 USGS AT BLDG 651 METEOROLOGICAL ST., GUAYNABO, PR 1997-04-16 1997-04-16 1
  group icon Gurabo Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181337066004100 GNAV WELL, GURABO, PR 1990-04-19 1990-04-19 2
USGS 181503065565600 CSAN WELL, GURABO, PR 1990-07-09 1990-07-09 1
USGS 181503065571700 BER WELL, GURABO, PR 1990-04-30 1990-04-30 1
USGS 181524065573900 PJMOR WELL, GURABO, PR 1987-06-30 1990-08-23 2
USGS 181531066002600 KOFRESI WELL, GURABO, PR 1946-02-04 1946-02-04 1
USGS 181544065583200 ODAV WELL, GURABO, PR 1990-04-26 1990-04-26 1
USGS 181548065590700 EEA GURABO 3 WELL, GURABO, PR 1982-07-12 1982-07-12 1
USGS 181550065593200 PIEZOMETER USGS 50, GURABO, PR 1957-04-17 2004-01-09 4
USGS 181550066002700 PIEZOMETER CJ 8, GURABO, PR 1987-08-10 1987-08-10 1
USGS 181625065570400 VSAN WELL, GURABO, PR 1980-07-01 1980-07-01 1
USGS 50052900 QUEBRADA LAS BAMBUAS AT MOUTH, PR 2014-08-07 2015-03-10 2
USGS 50055080 RIO GRANDE DE LOIZA ABV LAGO LOIZA, PR 1973-12-13 1974-09-11 8
USGS 50057000 RIO GURABO AT GURABO, PR 1958-09-10 2005-11-04 285
USGS 50057025 RIO GURABO NR GURABO, PR 1979-11-27 2024-02-12 204
USGS 50057050 RIO GURABO ABV LAGO LOIZA, PR 1973-12-13 1974-09-11 9
USGS 50057500 LAGO LOIZA NO. 4 NR MOUTH NR CAGUAS, PR 1973-11-20 2015-03-12 110
USGS 50058600 LAGO LOIZA STATION NO. 5, PR 1973-11-20 1974-10-29 36
  group icon Humacao Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180635065490400 PDM 3 WELL, HUMACAO, PR 1984-01-27 1984-01-27 1
USGS 180708065470100 OCHENTA WELL, HUMACAO, PR 1984-01-17 1984-01-17 1
USGS 180841065473100 PIEZOMETER ROIG 1, HUMACAO, PR 1983-09-20 1983-09-20 1
USGS 180841065505000 SAN ANTONIO SPRING, HUMACAO, PR 1961-02-03 1961-02-03 1
USGS 180843065473100 ROIG AB-4 WELL, HUMACAO, PR 1983-09-19 1983-09-19 1
USGS 180851065492100 SANTIAGO WELL, HUMACAO, PR 1971-04-13 1971-04-13 1
USGS 180856065481300 SCHROEDER WELL, HUMACAO, PR 1962-04-26 1962-04-26 1
USGS 180859065473803 SQB IND 7 WELL, HUMACAO, PR 1983-09-14 1983-09-14 1
USGS 180859065474100 SQB 4 WELL, HUMACAO, PR 1981-09-16 1982-07-07 2
USGS 180942065505000 EPER WELL, HUMACAO, PR 1984-01-27 1984-01-27 1
USGS 180959065473800 PIEZOMETER SQB 2, HUMACAO, PR 1983-09-14 1983-09-14 1
USGS 181039065465700 PIEZOMETER PRLA 1, HUMACAO, PR 1983-09-20 1984-01-26 2
USGS 181138065493200 SAYA 2 WELL, HUMACAO, PR 1984-01-17 1984-01-17 1
USGS 181146065485800 SAYA 1 WELL, HUMACAO, PR 1961-10-10 1961-10-10 1
USGS 181149065471400 HFDAI WELL, HUMACAO, PR 1984-01-24 1984-01-24 1
USGS 50078300 QUEBRADA MAMBICHE AT ANTON RUIZ, PR 2005-07-20 2010-08-17 3
USGS 50078510 RIO ANTON RUIZ AT PASTO, PR 1984-01-25 2015-07-31 10
USGS 50078600 QUEBRADA DE LAS MULAS NR MAMBICHE, PR 2005-07-21 2010-08-17 3
USGS 50078900 QUEBRADA FRONTERA AT HWY 3, PR 2005-07-20 2010-08-17 3
USGS 50081500 RIO HUMACAO NR HUMACAO, PR 1972-10-11 2010-08-16 9
USGS 50081890 UNNAMED CREEK NR HUMACAO, PR 2005-07-20 2010-08-16 3
USGS 50081900 QUEBRADA MARIANA AT PATAGONIA, PR 2005-07-20 2010-08-16 3
USGS 50082000 RIO HUMACAO AT HWY 3 AT HUMACAO, PR 1958-09-19 2024-02-13 292
USGS 50082350 QUEBRADA CATANO AT MOUTH, PR 2005-07-20 2010-08-17 3
USGS 50082400 RIO HUMACAO AT SANTA TERESA, PR 2005-07-20 2010-08-17 3
USGS 50082600 RIO CANDELERO AT HWY 906, PR 1984-01-25 1984-01-25 1
USGS 50082700 RIO CANDELERO AT MOUTH, PR 2005-07-20 2010-08-18 3
  group icon Juncos Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181315065523100 SANTA ANA 1 WELL, JUNCOS, PR 1990-04-30 1990-04-30 2
USGS 181402065523200 EBER 1 WELL, JUNCOS, PR 1990-08-23 1990-08-23 1
USGS 181404065523300 EBER 2 WELL, JUNCOS, PR 1987-07-08 1987-07-08 1
USGS 181415065545400 PIEZOMETER CJ 6, JUNCOS, PR 1987-10-15 1990-08-06 2
USGS 181501065555500 PIEZOMETER CJ 4A, JUNCOS, PR 1987-10-16 1990-07-16 2
USGS 181501065555501 PIEZOMETER CJ 4B, JUNCOS, PR 1990-07-16 1990-07-16 1
USGS 181513065554600 PIEZOMETER CJ 3A, JUNCOS, PR 1990-07-12 1990-07-12 1
USGS 181513065554601 PIEZOMETER CJ 3B, JUNCOS, PR 1987-10-15 2004-02-10 2
USGS 181518065561400 MEN 2 WELL, JUNCOS, PR 1987-07-08 1990-06-28 2
USGS 50055750 RIO GURABO BLW EL MANGO, PR 1995-10-10 2000-08-23 47
USGS 50056400 RIO VALENCIANO NR JUNCOS, PR 1971-03-09 2002-04-20 151
USGS 50056500 RIO VALENCIANO AT JUNCOS, PR 1958-03-19 2024-02-13 56
USGS 50056550 RIO VALENCIANO AT MOUTH, PR 1987-07-23 2005-08-02 3
USGS 50056600 RIO GURABO NR JUNCOS, PR 2005-03-09 2005-08-02 2
  group icon Las Piedras Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181206065514400 HERMOSURA 2 WELL, LAS PIEDRAS, PR 1987-07-08 1990-07-26 2
USGS 181220065502300 HCUC 2 WELL, LAS PIEDRAS, PR 1990-04-26 1990-04-26 1
USGS 181322065500300 LAS TORRES 1 WELL, LAS PIEDRAS, PR 1967-03-29 1967-03-29 1
USGS 50055610 RIO GURABO NEAR LAS PIEDRAS, PR 2005-03-10 2005-08-03 2
USGS 50056000 RIO VALENCIANO NR LAS PIEDRAS, PR 1958-03-18 2005-08-03 35
USGS 50081000 RIO HUMACAO AT LAS PIEDRAS, PR 1959-01-29 1979-09-10 171
USGS 50081300 RIO HUMACAO AT HUMACAO DAMSITE, PR 1984-01-19 1984-01-19 1
  group icon Loiza Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182145065543900 GUMDIN WELL, LOIZA, PR 1961-10-09 1961-10-09 1
USGS 182543065520400 ALL WELL, LOIZA, PR 1962-04-24 1962-04-24 1
USGS 50050344 PNN100 1994-12-14 1995-07-18 10
USGS 50050345 LAGUNA PINONES NO. 1 NR CAROLINA, PR 1973-12-03 1990-03-23 14
USGS 50050346 PINONES CANAL NR CAROLINA, PR 1974-01-22 1974-10-23 52
USGS 50050348 LAGUNA TORRECILLA NO. 5 NR CAROLINA, PR 1974-01-30 1989-09-28 16
USGS 50050350 LAGUNA TORRECILLA NO. 4 NR CAROLINA, PR 1973-12-03 1996-08-30 95
USGS 50050353 SUAREZ CANAL AT HWY 26 BRIDGE NR CAROLINA, PR 1974-01-22 2005-06-17 92
USGS 50050355 LAGUNA TORRECILLA NO. 3 NR CAROLINA, PR 1973-12-03 2005-06-17 133
USGS 50050370 LAGUNA TORRECILLA NO. 2 NR CAROLINA, PR 1973-12-03 1989-09-28 13
USGS 50050375 LAGUNA TORRECILLA NO. 1 NR CAROLINA, PR 1972-02-19 2005-06-20 101
USGS 50061200 RIO CANOVANILLAS AT CARRUZOS, PR 1998-04-17 1998-08-14 2
USGS 50061800 RIO CANOVANAS NR CAMPO RICO, PR 1967-04-11 2004-09-22 1454
USGS 50062000 RIO CANOVANAS AT LOIZA, PR 1958-03-20 1966-04-15 10
USGS 50062200 RIO GRANDE DE LOIZA AT CENTRAL CANOVANAS, PR 1973-09-18 1979-08-24 41
USGS 50062250 RIO GRANDE DE LOIZA AT HWY 187 AT LOIZA, PR 1993-10-29 1994-02-14 64
USGS 50062500 RIO HERRERA NR COLONIA DOLORES, PR 1963-01-23 1973-12-10 48
USGS 50062800 RIO HERRERA NR LOIZA, PR 2005-07-15 2010-08-18 3
USGS 50063000 QUEBRADA CAMBALACHE NR LOIZA, PR 1962-02-20 1966-04-15 6
  group icon Luquillo Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182109065420000 PIEZOMETER USGS RP 1, LUQUILLO, PR 1994-10-27 1994-10-27 1
USGS 182125065453500 PIEZOMETER RM-1, LUQUILLO, PR 1994-12-13 1994-12-13 1
USGS 182130065415400 PIEZOMETER USGS RP 2, LUQUILLO, PR 1994-11-21 1994-11-21 1
USGS 182131065421100 PIEZOMETER RIO PITAHAYA 4 LUQUILLO, PR 2003-04-04 2008-05-15 9
USGS 182147065421800 PIEZOMETER USGS RP 5, LUQUILLO, PR 1994-10-25 1994-10-25 1
USGS 182150065414900 PIEZOMETER USGS RP 3, LUQUILLO, PR 1994-12-14 1994-12-14 1
USGS 182155065430600 PIEZOMETER USGS RS 3, LUQUILLO, PR 1994-11-23 1994-11-23 1
USGS 182231065430203 CEMENTERIO, LUQUILLO, PR 1986-03-27 1986-11-21 4
USGS 182234065440000 PIEZOMETER QDA. MATA DE PLATANOS 1, LUQUILLO, PR 1994-10-14 2005-02-11 8
USGS 182240065453800 PIEZOMETER RM 3, LUQUILLO, PR 1994-11-18 1994-11-18 1
USGS 182256065443400 MAMEYES PRIMERO WELL, LUQUILLO, PR 1945-11-07 1945-11-07 1
USGS 50065600 RIO MAMEYES AT YMCA, PR 2005-07-19 2010-08-19 3
USGS 50065650 RIO MAMEYES ABV QUEBRADA TABONUCO, PR 2005-07-18 2015-07-30 15
USGS 50065750 QUEBRADA ANON AT MOUTH, PR 2005-07-18 2010-08-19 3
USGS 50066000 RIO MAMEYES AT MAMEYES, PR 1958-09-11 2010-08-19 61
USGS 50066100 UNNAMED CREEK AT HWY 3 NR MAMEYES, PR 2005-07-18 2010-08-18 3
USGS 50066475 QUEBRADA MATA DE PLATANO NR MONSERRATE, PR 2005-07-18 2010-08-18 3
USGS 50066490 QUEBRADA MATA DE PLATANO AT HWY 3 (ANCIENT), PR 2005-07-18 2010-08-18 3
USGS 50066500 QUEBRADA MATA DE PLATANO NR LUQUILLO, PR 2005-07-18 2015-07-30 16
USGS 50067000 RIO SABANA AT SABANA, PR 1981-08-19 1995-02-08 6
USGS 50067200 RIO SABANA AT YUQUIYU, PR 2005-07-19 2010-08-19 3
USGS 50067500 RIO SABANA NR LUQUILLO, PR 1961-02-21 1966-04-12 7
USGS 50068000 RIO SABANA AT LUQUILLO, PR 1958-09-11 2010-08-17 8
USGS 50068710 RIO PITAHAYA NR PITAHAYA, PR 2005-07-19 2010-08-19 3
USGS 50068900 RIO PITAHAYA AT CASA BLANCA, PR 2005-07-19 2010-08-19 3
USGS 50069000 RIO PITAHAYA NR LUQUILLO, PR 1960-03-28 2010-08-19 11
USGS 50069050 RIO PITAHAYA AT SAN MIGUEL, PR 2005-07-19 2010-08-19 3
USGS 50069305 RIO JUAN MARTIN DOWNSTREAM OF HWY 3, PR 2005-07-19 2010-08-19 3
  group icon Maunabo Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 50088000 QUEBRADA EMAJAGUA AT EMAJAGUA, PR 2005-07-20 2010-08-16 3
USGS 50090000 RIO MAUNABO NEAR MATUYAS ALTO 2007-06-20 2007-06-20 1
USGS 50090100 RIO LACHI AT MOUTH, PR 2007-06-20 2007-06-20 1
USGS 50090200 QUEBRADA COROCO AT MOUTH 2007-06-20 2007-06-20 1
USGS 50090500 RIO MAUNABO AT LIZAS, PR 1971-03-12 2007-06-20 37
USGS 50090510 UNNAMED CREEK AT LIZAS 2007-06-20 2007-06-20 1
USGS 50090540 UNNAMED CREEK AT HIGHWAY 759 2007-06-20 2007-06-20 1
USGS 50090560 UNNAMED CREEK AT MOUTH 2007-06-20 2007-06-20 1
USGS 50090580 QUEBRADA TUMBADA NEAR GARONA 2007-06-20 2007-06-20 1
USGS 50090600 QUEBRADA DE LOS CHINOS AT PALO SECO 2007-06-20 2007-06-20 1
USGS 50090850 QUEBRADA TALANTE NEAR MAUNABO 2007-06-21 2007-06-21 1
USGS 50091000 RIO MAUNABO AT MAUNABO, PR 1958-09-19 2024-01-29 261
USGS 50091210 UNNAMED CREEK AT CALZADA 2007-06-21 2007-06-21 1
USGS 50091230 UNNAMED CREEK AT HIGHWAY 3 2007-06-21 2007-06-21 1
USGS 50091250 QUEBRADA ARENAS AT QUEBRADA ARENAS 2007-06-21 2007-06-21 1
USGS 50091290 QUEBRADA ARENAS ABV HWY 901, PR 2005-07-20 2010-08-16 2
USGS 50091300 QUEBRADA ARENAS AT MAUNABO, PR 1972-09-26 1973-09-18 5
USGS 50091305 QUEBRADA ARENAS BELOW HIGHWAY 901 2007-06-21 2007-06-21 1
  group icon Naguabo Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181102065440300 PIEZOMETER COCO RICO 1, NAGUABO, PR 1983-09-22 1983-09-22 1
USGS 181102065440500 CRIC WELL, NAGUABO, PR 1961-10-01 1983-09-22 3
USGS 181132065432000 PIZ WELL, NAGUABO, PR 1962-04-26 1962-04-26 1
USGS 181204065433200 STANDARD WELL, NAGUABO, PR 1967-06-01 1967-06-29 2
USGS 181205065431000 AFUE WELL, NAGUABO, PR 1961-02-01 1962-04-26 2
USGS 181217065453000 PIEZOMETER CA-1, NAGUABO, PR 1983-09-15 2008-05-15 6
USGS 181250065475800 PENA POBRE 2 WELL, NAGUABO, PR 1963-01-23 1963-01-23 1
USGS 181254065480500 PENA POBRE 1 WELL, NAGUABO, PR 1980-05-01 1980-05-01 1
USGS 181318065470600 RIO BLANCO 2 WELL, NAGUABO, PR 1983-09-21 1983-09-21 1
USGS 181354065435700 EL DUQUE WELL, NAGUABO, PR 1984-01-24 1984-01-24 1
USGS 50073375 QUEBRADA DEL PLATANO AT EL BANCO, PR 2005-07-21 2010-08-18 3
USGS 50073400 QUEBRADA PALMA AT DAGUAO, PR 1972-09-22 2010-08-18 41
USGS 50073500 QUEBRADA BOTIJAS AT HWY 31, PR 2005-07-21 2010-08-17 3
USGS 50073900 RIO SANTIAGO NR NAGUABO, PR 2005-07-21 2010-08-18 3
USGS 50073975 QUEBRADA GRANDE AT MOUTH, PR 2005-07-21 2010-08-18 3
USGS 50074000 RIO SANTIAGO AT NAGUABO, PR 1984-01-18 1984-01-18 1
USGS 50074004 RIO SANTIAGO AT NAGUABO 2005-07-21 2010-08-17 3
USGS 50074950 QUEBRADA GUABA NR NAGUABO, PR 1992-02-02 2004-05-12 832
USGS 50075000 RIO ICACOS NR NAGUABO, PR 1962-03-13 2004-06-10 1489
USGS 50076000 RIO BLANCO NR FLORIDA, PR 1983-04-21 1983-04-21 4
USGS 50076300 QUEBRADA DE PENA POBRE AT MOUTH, PR 2005-07-21 2010-08-17 3
USGS 50076600 RIO BLANCO AT RIO BLANCO PUMP HOUSE, PR 1983-09-21 1983-09-21 1
USGS 50077000 RIO BLANCO AT RIO BLANCO, PR 1958-10-10 1977-08-01 48
USGS 50077500 RIO BLANCO BLW LA FE, PR 1983-09-15 2010-08-16 4
USGS 50077525 QUEBRADA VACA AT MAIZALES, PR 2005-07-21 2010-08-17 3
USGS 50077550 QUEBRADA MAIZALES AT MAIZALES, PR 2005-07-21 2010-08-17 3
USGS 50077600 QUEBRADA VACA BLW LA FE, PR 2005-07-21 2010-08-16 3
  group icon Naranjito Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 50044810 RIO GUADIANA NR GUADIANA, NARANJITO PR 2004-10-12 2004-11-12 4
USGS 50044830 RIO GUADIANA AT GUADIANA, PR 1995-10-10 1996-09-14 20
USGS 50044850 RIO GUADIANA NR NARANJITO, PR 1979-11-20 2024-02-21 215
  group icon Rio Grande Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182043065453700 CRISTAL DEL YUNQUE SPRING, RIO GRANDE, PR 1961-07-27 1961-07-27 1
USGS 182058065465800 LOSO 1 SPRING, RIO GRANDE, PR 1964-05-22 1964-05-22 1
USGS 182123065460400 COLINAS DEL YUNQUE WELL, RIO GRANDE, PR 1974-10-01 1974-10-01 1
USGS 182213065484200 LAS TRES T WELL, RIO GRANDE, PR 1961-10-10 1961-10-10 1
USGS 182223065455900 PIEZOMETER RIO MAMEYES 2, RIO GRANDE, PR 1994-10-28 1994-10-28 1
USGS 182233065521800 MARI 2 WELL, RIO GRANDE, PR 1963-11-19 1963-11-19 1
USGS 182238065490300 HAD WELL, RIO GRANDE, PR 1963-11-15 1963-11-18 2
USGS 182255065500800 FUENTES 1 WELL, RIO GRANDE, PR 1963-11-18 1963-11-18 1
USGS 182307065473500 BER 1 WELL, RIO GRANDE, PR 1961-03-09 1961-03-09 1
USGS 182317065474600 QJ-2 WELL, RIO GRANDE, PR 1994-11-04 1994-11-04 1
USGS 182344065490801 PIEZOMETER USGS RE 2A, RIO GRANDE, PR 1994-11-07 1994-11-07 1
USGS 182428065493500 MOLINA WELL, RIO GRANDE, PR 1963-11-18 1963-11-18 1
USGS 182503065494000 QUI WELL, RIO GRANDE, PR 1963-11-18 1963-11-18 1
USGS 50063045 QUEBRADA CAMBALACHE AT MOUTH, PR 2005-07-18 2010-08-18 3
USGS 50063065 RIO HERRERA AT CIENAGA BAJA, PR 2005-07-18 2015-07-30 17
USGS 50063250 RIO ESPIRITU SANTO ABV EL VERDE, PR 1969-08-04 1969-08-04 1
USGS 50063300 RIO ESPIRITU SANTO NR EL VERDE, PR 1963-01-22 1974-01-16 40
USGS 50063800 RIO ESPIRITU SANTO NR RIO GRANDE, PR 1958-09-11 2024-02-13 283
USGS 50064000 RIO ESPIRITU SANTO AT RIO GRANDE, PR 1958-09-11 2010-08-19 11
USGS 50064200 RIO GRANDE NR EL VERDE, PR 1967-05-15 1982-01-20 33
USGS 50064250 RIO GRANDE NR RIO GRANDE, PR 1963-01-24 1963-11-22 6
USGS 50064300 RIO GRANDE AT GUZMAN ABAJO, PR 2005-07-18 2010-08-19 3
USGS 50064500 RIO GRANDE AT RIO GRANDE, PR 1958-09-11 2010-08-19 18
USGS 50064700 QUEBRADA BONETA AT RIO GRANDE, PR 1981-11-19 1981-11-19 1
USGS 50064800 RIO ESPIRITU SANTO NR BLASINA, PR 2005-07-15 2010-08-18 3
USGS 50064850 QUEBRADA DE LAS LAJAS AT HWY 3, PR 2005-07-18 2010-08-19 3
USGS 50064900 QUEBRADA JUAN GONZALEZ NR RIO GRANDE, PR 1995-02-07 1995-02-07 1
USGS 50064910 QUEBRADA JUAN GONZALEZ AT HWY 3, PR 2005-07-18 2010-08-20 3
USGS 50065100 QUEBRADA SUSPIRO NR RIO GRANDE, PR 2005-07-19 2010-08-20 3
USGS 50065500 RIO MAMEYES NR SABANA, PR 1964-05-12 2004-11-14 1623
USGS 50065549 METEOROLOGICAL STATION AT BISLEY, PR 1995-07-31 1996-09-03 7
USGS 50065680 QUEBRADA TABONUCO AT HWY 191, PR 2005-07-18 2010-08-19 3
USGS 50065700 RIO MAMEYES AT HWY 191 AT MAMEYES, PR 1966-04-14 1982-01-19 71
USGS 50066020 UNNAMED CREEK AT MAMEYES WPP, PR 2005-07-18 2010-08-18 3
USGS 50066025 RIO MAMEYES BLW HWY 3, PR 2005-07-18 2010-08-19 3
  group icon Salinas Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 175708066163001 PIEZOMETER ERMITANO NORTH SALINAS, PR 2007-05-22 2007-05-22 1
USGS 175708066163002 PIEZOMETER ERMITANO SOUTH SALINAS, PR 2007-05-22 2015-09-23 6
USGS 180000066125204 PIEZOMETER AGUIRRE HW 4E, SALINAS, PR 1988-04-06 1988-04-07 3
USGS 180002066123100 PIEZOMETER AGUIRRE HW 18, SALINAS, PR 1988-06-09 1988-06-10 3
USGS 180004066130200 PIEZOMETER AGUIRRE HW 21, SALINAS, PR 1988-07-15 1988-07-18 2
USGS 180006066123702 PIEZOMETER AGUIRRE HW 7C, SALINAS, PR 1988-05-17 1988-05-18 3
USGS 180012066125502 PIEZOMETER AGUIRRE HW 11C, SALINAS, PR 1988-05-23 1988-05-31 2
USGS 180208066135600 TGO 1 WELL, SALINAS, PR 1988-12-27 1988-12-27 1
USGS 180217066141900 AO-3 WELL, SALINAS, PR 1988-07-19 1993-08-31 39
USGS 180219066142200 TGO 4 WELL, SALINAS, PR 1961-10-10 1963-03-01 5
USGS 50100500 RIO MAJADA NR RABO DEL BUEY, PR 1961-10-31 1966-04-11 7
USGS 50100700 RIO MAJADA AT RABO DEL BUEY, PR 1960-09-15 2011-03-22 5
  group icon San Juan Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182217066024900 JBEN WELL, SAN JUAN, PR 1956-03-23 1956-03-23 1
USGS 182226066034300 PIEZOMETER SAN FERNANDO 18, SAN JUAN, PR 1989-06-21 1989-06-21 1
USGS 182227066031800 PIEZOMETER SAN GERARDO 17, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182254066033800 PIEZOMETER JIMENEZ 16, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182308066042500 PIEZOMETER SRS 15, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182318066042500 PIEZOMETER CEMENTERIO 14, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182324066031800 LAS CASCADAS WELL, SAN JUAN, PR 1985-05-30 1985-05-30 1
USGS 182326066031500 ZILO WELL, SAN JUAN, PR 1985-05-30 1985-05-30 1
USGS 182349066032600 PIEZOMETER JARDIN BOTANICO I-13, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182350066040900 VILLA NEVAREZ WELL, SAN JUAN, PR 1974-07-10 1985-04-01 5
USGS 182351066022800 MLAU WELL, SAN JUAN, PR 1963-02-11 1963-02-11 1
USGS 182351066032200 PIEZOMETER MAX BOHR I-12, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182351066032201 PIEZOMETER MAX BOHR II-12, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182352066035200 PLANTA PILOTO WELL, SAN JUAN, PR 1985-05-30 1985-05-30 1
USGS 182357066012800 PAM WELL, SAN JUAN, PR 1985-05-30 1985-05-30 1
USGS 182402066050200 BGRA WELL, SAN JUAN, PR 1974-10-10 1974-10-10 2
USGS 182406066032601 PIEZOMETER JARDIN BOTANICO II-13, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182406066034700 PIEZOMETER JARDIN BOTANICO III-19 SAN JUAN, PR 1989-07-20 2008-05-15 12
USGS 182411066045800 ISA WELL, SAN JUAN, PR 1974-10-02 1974-10-02 2
USGS 182417066042700 PIEZOMETER LAS AMERICAS I-10, SAN JUAN, PR 1989-07-19 1989-07-19 1
USGS 182417066042701 PIEZOMETER LAS AMERICAS II-10, SAN JUAN, PR 1989-07-19 1989-07-19 1
USGS 182418066040600 PIEZOMETER LOS OLMOS 11, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182432066023300 NC-3 RIO PIEDRAS WELL, SAN JUAN, PR 1986-05-19 1986-05-19 1
USGS 182435066052700 PIEZOMETER SALUD MENTAL I-5 SAN JUAN, PR 1989-07-19 2008-05-16 9
USGS 182435066052701 PIEZOMETER SALUD MENTAL II-5, SAN JUAN, PR 1989-07-19 1989-07-19 1
USGS 182437066040500 PIEZOMETER PARQUE FUENTES I-7, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182437066040501 PIEZOMETER PARQUE FUENTES II-7, SAN JUAN, PR 1989-02-16 1989-02-16 1
USGS 182439066015900 MAPER 1 WELL, SAN JUAN, PR 1980-01-15 1989-11-16 3
USGS 182440066030300 HAM 1 WELL, SAN JUAN, PR 1985-05-30 1985-05-30 1
USGS 182442066035000 ISABEL LA CATOLICA WELL, SAN JUAN, PR 1977-05-20 1977-05-20 2
USGS 182443066041502 PIEZOMETER MUNOZ MARIN 1C-8, SAN JUAN, PR 1989-07-19 1989-07-19 1
USGS 182445066043400 PIEZOMETER ALSACIA I-6, SAN JUAN, PR 1989-07-19 1989-07-19 1
USGS 182445066043401 PIEZOMETER ALSACIA II-6 SAN JUAN, PR 1989-07-19 2008-05-16 9
USGS 182446066000800 CCLU WELL, SAN JUAN, PR 1974-12-04 1974-12-04 2
USGS 182452066022700 LA COTORRA WELL, SAN JUAN, PR 1989-11-07 1989-11-07 1
USGS 182500066043300 PIEZOMETER MUNOZ MARIN 2-3, SAN JUAN, PR 1989-07-20 1989-07-20 1
USGS 182505066030900 MCCRAKEN NUEVO WELL, SAN JUAN, PR 1981-09-01 1982-07-15 3
USGS 182506066030800 MCCRAKEN VIEJO WELL, SAN JUAN, PR 1960-03-26 1980-01-15 4
USGS 182511066045400 PIEZOMETER LA ESPERANZA I-2, SAN JUAN, PR 1989-07-19 1989-07-19 1
USGS 182511066045401 PIEZOMETER LA ESPERANZA II-2, SAN JUAN, PR 1989-07-19 1989-07-19 1
USGS 182515066012200 LAGUNA SAN JOSE 8, SAN JUAN, PR 1986-10-15 1986-10-15 1
USGS 182526066030300 BAR WELL, SAN JUAN, PR 1989-11-08 1989-11-08 1
USGS 182527066040800 TM 1 WELL, SAN JUAN, PR 1962-04-17 1962-04-17 1
USGS 182529066032000 JULIA 2 WELL, SAN JUAN, PR 1948-01-01 1948-01-01 1
USGS 182530066015300 LAGUNA SAN JOSE 4, SAN JUAN, PR 1986-10-15 1986-10-15 1
USGS 182532066033200 BDPON WELL, SAN JUAN, PR 1989-11-09 1989-11-10 2
USGS 182541066025200 TRANSPORTACION WELL, SAN JUAN, PR 1989-11-08 1989-11-08 1
USGS 182637066042200 CORONA NC-15 WELL, SAN JUAN, PR 1988-02-04 1988-02-04 1
USGS 182647066042900 CORONA 1 WELL, SAN JUAN, PR 1973-07-11 1973-07-11 1
USGS 182701066045200 ARR WELL, SAN JUAN, PR 1954-06-26 1954-06-26 1
USGS 182723066055200 STORMWATER STATION AT ARMY AVIATION, SAN JUAN, PR 2020-10-05 2023-07-17 14
USGS 182726066042700 GUIJARRO WELL, SAN JUAN, PR 1962-04-17 1962-04-17 1
USGS 50048610 BAHIA DE SAN JUAN NO. 6, SAN JUAN PR 2002-02-26 2005-06-15 31
USGS 50048700 QUEBRADA LAS CURIAS NR RIO PIEDRAS, PR 1972-08-16 1976-06-02 10
USGS 50048750 QUEBRADA LAS CURIAS TRIBUTARY NR CAIMITO, PR 1972-08-16 1979-08-02 45
USGS 50048770 RIO PIEDRAS AT EL SENORIAL, PR 1996-01-01 2003-09-21 56
USGS 50048800 RIO PIEDRAS NR RIO PIEDRAS, PR 1971-10-15 2016-05-20 241
USGS 50048900 RIO PIEDRAS AT HWY 176 AT RIO PIEDRAS, PR 1965-02-08 1966-04-15 2
USGS 50049000 RIO PIEDRAS AT RIO PIEDRAS, PR 1960-03-28 1982-03-11 51
USGS 50049100 RIO PIEDRAS AT HATO REY, PR 1970-10-06 2024-02-15 296
USGS 50049300 QUEBRADA JOSEFINA AT PUERTO NUEVO, PR 1972-09-21 1973-06-12 4
USGS 50049710 CR2400 1994-12-15 1995-07-18 17
USGS 50049760 LAGUNA SAN JOSE NO. 1 AT SAN JUAN, PR 1973-12-03 1996-08-30 181
USGS 50049820 LAGUNA SAN JOSE NO. 2 AT SAN JUAN, PR 1973-12-03 2006-05-17 223
USGS 50049830 QDA JUAN MENDEZ NR REPARTO UNIVERSITARIO, SAN JUAN 2002-02-25 2005-06-21 18
USGS 50049840 MARTIN PENA CANAL AT BARBOSA BRDG AT SAN JUAN, PR 1974-01-20 1995-07-20 56
USGS 50049850 MPN500 1994-12-16 2005-06-14 40
USGS 50049900 MARTIN PENA CANAL AT CONST BRDG AT SAN JUAN, PR 1974-01-23 1974-01-24 35
USGS 50049920 BAHIA DE SAN JUAN NO. 5 AT SAN JUAN, PR 1973-12-05 2006-05-17 211
USGS 50049925 BAHIA DE SAN JUAN PYLON NO. 5, PR 1995-03-15 1995-07-19 4
USGS 50049930 BAHIA DE SAN JUAN NO. 4 AT SAN JUAN, PR 1973-12-05 1995-07-19 27
USGS 50049935 SJN600 1994-12-16 1995-07-19 9
USGS 50049940 BAHIA DE SAN JUAN NO. 3 AT SAN JUAN, PR 1970-10-31 2005-06-15 130
USGS 50049960 RIO PUERTO NUEVO AT MOUTH, SAN JUAN, PR 2002-02-27 2005-06-14 19
USGS 50050030 LAGUNA DEL CONDADO NO. 2 AT SANTURCE, PR 1973-12-05 1974-11-19 24
USGS 50050040 LAGUNA DEL CONDADO NO. 1 AT SANTURCE, PR 1973-12-05 1974-11-19 13
USGS 50050045 LAGUNA DEL CONDADO AT ASHFORD AVE BRDG AT SANTURCE 1974-01-24 1974-01-25 26
USGS 50050050 LAGUNA DEL CONDADO AT P. DOS HERMANOS AT SANTURCE 1974-01-24 1974-01-25 29
USGS 50050060 CANO SAN ANTONIO AT MOUTH, SAN JUAN PR 2002-02-26 2005-06-14 31
  group icon San Lorenzo Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 50050900 RIO GRANDE DE LOIZA AT QUEBRADA ARENAS, PR 1981-08-17 1982-03-10 5
USGS 50051000 RIO EMAJAGUA NR SAN LORENZO, PR 1958-03-18 2015-08-04 18
USGS 50051040 RIO GRANDE DE LOIZA AT HIGHWAY 902, PR 2005-03-10 2005-08-04 2
USGS 50051150 QUEBRADA BLANCA AT EL JAGUAL, PR 1995-10-14 1999-11-17 43
USGS 50051180 QUEBRADA SALVATIERRA NR SAN LORENZO, PR 1995-10-21 2000-09-18 64
USGS 50051300 RIO CAYAGUAS NR CERRO GORDO, PR 1963-03-07 1963-03-07 1
USGS 50051310 RIO CAYAGUAS AT CERRO GORDO, PR 1981-08-18 2004-09-22 1090
USGS 50051500 RIO CAYAGUAS NR SAN LORENZO, PR 1962-02-22 2024-02-14 53
USGS 50051800 RIO GRANDE DE LOIZA AT HWY 183 SAN LORENZO, PR 1995-12-12 2013-06-07 63
USGS 50052000 RIO GRANDE DE LOIZA AT SAN LORENZO, PR 1958-03-18 1976-12-16 4
USGS 50052300 RIO GRANDE DE LOIZA AT SAN LORENZO NORTE, PR 1965-02-05 1966-04-11 2
USGS 50052500 RIO GRANDE DE LOIZA AT ROOSEVELT, PR 1960-03-25 1985-10-16 7
  group icon Toa Alta Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181933066122800 LAGO LA PLATA 5, TOA ALTA, PR 1980-03-28 1982-03-01 7
USGS 181950066140600 LAGO LA PLATA 3 NR DAM NR NARANJITO, TOA ALTA, PR 1980-03-28 1981-07-02 5
USGS 182126066120100 RAM WELL, TOA ALTA, PR 1985-04-19 1985-04-19 1
USGS 182153066144200 DSAN 2 WELL, TOA ALTA, PR 1964-09-01 1964-09-01 1
USGS 182250066145200 RFER WELL, TOA ALTA, PR 1963-01-03 1963-01-03 1
USGS 182341066142400 CMITA WELL, TOA ALTA, PR 1985-05-22 1985-05-22 1
USGS 50044400 LAGO LA PLATA NO. 5 NR MOUTH NR NARANJITO, PR 1980-03-28 2005-02-17 100
USGS 50044950 LAGO LA PLATA NO. 3 NR DAMSITE NR NARANJITO, PR 1980-03-28 2002-07-10 141
USGS 50045000 LAGO LA PLATA AT DAMSITE NR TOA ALTA, PR 2010-04-08 2010-05-13 3
USGS 50045010 RIO DE LA PLATA BLW LA PLATA DAMSITE, PR 1995-10-23 2000-08-24 38
USGS 50045500 RIO BUCARABONES AT MOUTH, TOA ALTA, PR 2013-07-11 2015-08-03 7
USGS 50045800 RIO LAJAS AT TOA ALTA PR 1958-03-26 2015-08-03 49
  group icon Toa Baja Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182417066130700 SANTA ELENA WELL, TOA BAJA, PR 1985-05-08 1985-05-08 1
USGS 182443066134600 PENNOCK 2 WELL, TOA BAJA, PR 1961-05-02 1961-05-02 1
USGS 182501066142000 MCON NORTH WELL, TOA BAJA, PR 1980-01-15 1980-01-15 1
USGS 182518066104400 RIO PLANTATION 2CP WELL, TOA BAJA, PR 1972-05-02 1976-03-25 2
USGS 182519066104300 RIO PLANTATION 2 WELL, TOA BAJA, PR 1972-05-02 1972-05-02 1
USGS 182530066135400 CAMPANILLA NAVY WELL, TOA BAJA, PR 1976-08-10 2008-04-21 6
USGS 182547066110700 SABANA SECA 1 WELL, TOA BAJA, PR 1960-10-01 1980-02-12 6
USGS 182548066122300 CPPRO WELL, TOA BAJA, PR 1981-09-01 1982-07-06 3
USGS 182550066112900 USN 2 WELL, TOA BAJA, PR 1953-12-09 1959-09-01 4
USGS 182620066114000 COQUI WELL, TOA BAJA, PR 1963-04-09 1963-04-09 1
USGS 182622066114700 RCAOCHO WELL, TOA BAJA, PR 1963-04-09 1963-04-09 1
USGS 182623066140200 TMUN WEST WELL, TOA BAJA, PR 1985-05-08 1985-05-08 1
USGS 182630066122300 NC-13 WELL, TOA BAJA, PR 1987-10-13 1987-10-15 2
USGS 182654066150600 PIEZOMETER 1 TOA BAJA, PR 2003-04-03 2008-04-11 3
USGS 50046500 LEVITTOWN LAKE 7, TOA BAJA, PR 2010-04-22 2010-12-29 16
USGS 50046505 LEVITTOWN LAKE 6, TOA BAJA, PR 2010-04-22 2010-12-29 16
USGS 50046515 LEVITTOWN LAKE 1, TOA BAJA, PR 2010-04-22 2011-11-30 22
USGS 50046520 LEVITTOWN LAKE 2, TOA BAJA, PR 2010-04-22 2010-12-29 16
USGS 50046525 LEVITTOWN LAKE 3, TOA BAJA, PR 2010-04-22 2011-11-30 22
USGS 50046530 LEVITTOWN LAKE 4, TOA BAJA, PR 2010-04-22 2010-12-29 16
USGS 50046535 LEVITTOWN LAKE 5, TOA BAJA, PR 2010-04-22 2010-12-29 16
  group icon Trujillo Alto Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181954066014900 ZAL SPRING, TRUJILLO ALTO, PR 1961-07-28 1961-07-28 1
USGS 182020066014000 CARRAIZO WELL, TRUJILLO ALTO, PR 1980-03-01 1980-03-01 1
USGS 182058066013700 QGAR WELL, TRUJILLO ALTO, PR 1966-07-17 1966-07-17 1
USGS 182116066002900 ANT 410 WELL, TRUJILLO ALTO, PR 1963-02-18 1963-02-18 1
USGS 182128066002700 PRIP WELL, TRUJILLO ALTO, PR 1963-02-18 1963-02-18 1
USGS 50058700 LAGO LOIZA STATION NO. 6, PR 1973-11-20 1974-10-29 33
USGS 50058800 LAGO LOIZA NO. 7 NR DAMSITE NR TRUJILLO ALTO, PR 1973-11-20 2002-07-11 170
USGS 50058900 LAGO LOIZA STATION NO. 8, PR 1973-09-21 1974-01-11 6
USGS 50059000 LAGO LOIZA AT DAMSITE NEAR TRUJILLO ALTO, PR 1958-09-11 2012-08-29 269
USGS 50059050 RIO GRANDE DE LOIZA BLW LOIZA DAMSITE, PR 1996-01-15 2000-08-27 58
USGS 50059100 RIO GRANDE DE LOIZA BLW TRUJILLO ALTO, PR 1976-05-24 2024-02-15 210
USGS 50059210 QUEBRADA GRANDE AT BO. DOS BOCAS, PR 2005-03-08 2015-08-13 9
USGS 50060200 QUEBRADA MARACUTA AT TRUJILLO BAJO, PR 2005-03-10 2015-08-13 8
  group icon Yabucoa Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180202065520800 ROD SOUTH SPRING, YABUCOA, PR 1988-09-07 1988-09-07 2
USGS 180204065550100 RIV SPRING, YABUCOA, PR 1988-09-07 1988-09-07 2
USGS 180224065550900 ROJAS SPRING, YABUCOA, PR 1988-09-07 1988-09-07 2
USGS 180247065512900 VIL 1 WELL, YABUCOA, PR 1962-04-26 1962-04-26 1
USGS 180327065515300 PIEZOMETER USGS 10 OBS, YABUCOA, PR 1981-09-16 1981-09-16 1
USGS 180331065510600 PIEZOMETER SO 1 OUTPOST, YABUCOA, PR 1988-08-23 1988-08-23 1
USGS 180333065512900 SO 3 WELL, YABUCOA, PR 1970-10-15 1988-08-23 2
USGS 180334065523300 AH 3 WELL, YABUCOA, PR 1988-09-06 1988-09-06 2
USGS 180336065511200 SO 2 WELL, YABUCOA, PR 1970-07-31 1988-08-23 2
USGS 180344065513200 SO 4 WELL, YABUCOA, PR 1988-09-08 1988-09-08 1
USGS 180346065523000 SROI 2 WELL, YABUCOA, PR 1962-04-26 1962-04-26 1
USGS 180351065525700 YABUCOA 21 WELL, YABUCOA, PR 1945-11-01 1989-02-02 3
USGS 180358065503700 PIEZOMETER YABUCOA USGS BRACKISH, YABUCOA, PR 1993-02-19 1993-12-27 3
USGS 180359065501300 SO 1 PRODUCTION WELL, YABUCOA, PR 1970-03-24 1970-03-24 1
USGS 180403065513200 PIEZOMETER SO 6, YABUCOA, PR 1988-08-23 1988-08-23 1
USGS 180405065544300 MAT WELL, YABUCOA, PR 1988-09-06 1988-09-06 2
USGS 180415065513900 YABUCOA 7 WELL, YABUCOA, PR 2003-04-04 2008-05-15 8
USGS 180417065513400 SO 8 WELL, YABUCOA, PR 1971-08-20 1971-08-20 1
USGS 180442065515000 VALLE 10 WELL, YABUCOA, PR 1988-08-25 1988-08-25 2
USGS 180456065514900 VALLE 11 WELL, YABUCOA, PR 1988-08-25 1988-08-25 1
USGS 180456065515100 VALLE 7 WELL, YABUCOA, PR 1988-08-25 1988-08-25 1
USGS 180459065514101 VALLE 14 WELL, YABUCOA, PR 1988-08-25 1988-09-01 2
USGS 180522065511800 VALLE 24 WELL, YABUCOA, PR 1988-09-01 1988-09-01 1
USGS 180524065511500 VALLE 25 WELL, YABUCOA, PR 1988-09-01 1988-09-01 1
USGS 180548065513700 AH 2 WELL, YABUCOA, PR 1988-09-06 1988-09-06 2
USGS 50082525 RIO CANDELERO AT HWY 3, PR 2005-07-20 2010-08-16 3
USGS 50082800 RIO GUAYANES NR COLONIA LAURA, PR 1969-01-08 1982-03-09 88
USGS 50083300 TRIBUTARIO DE RIO GUAYANES AT CALABAZAS, PR 2005-07-20 2010-08-16 3
USGS 50083500 RIO GUAYANES NR YABUCOA, PR 1958-04-02 2012-08-15 207
USGS 50084000 RIO LIMONES NR YABUCOA, PR 1962-02-21 1972-04-26 39
USGS 50084025 RIO LIMONES AT LAURA, PR 2005-07-20 2010-08-16 3
USGS 50085000 RIO GUAYANES AT YABUCOA, PR 1958-04-02 2024-02-13 64
USGS 50085700 RIO GUAYANES NR MOUTH NR PLAYA DE GUAYANES, PR 1970-02-20 1972-04-26 7
USGS 50086000 RIO DEL INGENIO NR YABUCOA, PR 1962-02-21 1966-04-14 6
USGS 50086060 QUEBRADA AGUACATE AT HWY 3, PR 2005-07-20 2010-08-16 3
USGS 50086150 TRIBUTARIO DE RIO INGENIO BLW HWY 3, PR 2005-07-20 2010-08-16 3
USGS 50086300 RIO DEL INGENIO NR PLAYA DE GUAYANES, PR 1970-02-20 1972-04-26 8
USGS 50086475 RIO DEL INGENIO AT MOUTH, PR 2005-07-20 2010-08-17 3
USGS 50086500 RIO GUAYANES AT PLAYA DE GUAYANES, PR 1973-09-25 2010-08-18 171
USGS 50087000 QUEBRADA AGUAS LARGAS AT HWY 182, PR 2005-07-20 2010-08-16 3
USGS 50087200 CANO SANTIAGO NR CENTRAL ROIG, PR 1970-02-20 2010-08-17 10