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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 -- 333 sites found


Hydrologic unit = 21010003
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 Adjuntas Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181143066501500 LAGO GUAYO 3 ON RIO GUAYO BRANCH, ADJUNTAS, PR 1977-11-15 1977-12-05 4
USGS 181208066500300 LAGO GUAYO 2 NR CENTER OF LAKE, ADJUNTAS, PR 1977-11-15 1977-12-05 5
USGS 50140500 RIO GUILARTE NR ADJUNTAS, PR 1969-04-03 1969-04-03 1
USGS 50140800 RIO LIMANI NR ADJUNTAS, PR 1969-04-13 1969-04-13 1
USGS 50140900 RIO YAHUECAS AT HWY 135 NR ADJUNTAS, PR 1969-11-25 2010-02-24 24
USGS 50141000 RIO BLANCO NR ADJUNTAS, PR 1981-08-04 1982-01-06 4
  group icon Aguada Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182028067112700 ATALAYA SPRING, AGUADA, PR 1960-09-22 1994-03-08 2
USGS 182151067114700 EL CHORRO SPRING, AGUADA, PR 1960-09-22 1960-09-22 1
USGS 182228067113300 PIEZOMETER USGS 58, AGUADA, PR 1965-01-07 1965-01-07 1
USGS 50146300 RIO INGENIO AT JAGUEY, PR 2006-03-02 2011-03-24 3
USGS 50146550 RIO CULEBRA AT HWY 416, PR 2006-03-02 2015-08-21 10
USGS 50146600 RIO CULEBRA NR AGUADA, PR 1960-03-22 1966-04-14 8
USGS 50146610 RIO CULEBRA AT GUAYNABO, AGUADA, PR 2006-03-02 2011-03-24 3
USGS 50146620 UNNAMED CREEK AT GUAYABO, AGUADA, PR 2006-03-02 2011-03-24 3
USGS 50146630 RIO GUAYABO AT HWY 115, AGUADA, PR 2006-03-02 2011-03-24 3
USGS 50148500 RIO CANOS NR AGUADA, PR 1962-02-23 2010-02-23 10
USGS 50148700 RIO CANO AT MOUTH, PR 2007-03-06 2015-08-11 10
USGS 50148890 RIO CULEBRINAS AT MARGARITA DAMSITE NR AGUADA, PR 2002-07-06 2003-12-07 10
  group icon Aguadilla Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182411067090000 BBAR WELL, AGUADILLA, PR 2009-10-26 2010-02-22 4
USGS 50149200 CANO MADRE VIEJA AT HWY 115, PR 2006-03-02 2011-03-24 2
  group icon Anasco Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181703067032700 GON 1 SPRING, ANASCO, PR 1960-10-03 1960-10-03 1
USGS 181707067042400 GON 2 SPRING, ANASCO, PR 1960-10-04 1960-10-04 1
USGS 181733067101400 FRANCO WELL, ANASCO, PR 1962-05-08 1962-05-08 1
USGS 181738067055400 FLO SPRING, ANASCO, PR 1960-10-03 1960-10-03 1
USGS 181806067120200 NEG 1 SPRING, ANASCO, PR 1960-09-30 1960-09-30 1
USGS 181814067120300 NEG 2 SPRING, ANASCO, PR 1960-09-30 1960-09-30 1
USGS 181822067125200 RIV SPRING, ANASCO, PR 1960-09-30 1960-09-30 1
USGS 50144000 RIO GRANDE DE ANASCO NR SAN SEBASTIAN, PR 1963-01-10 2016-05-24 448
USGS 50144900 RIO HUMATA NR EL ESPINO, PR 2003-06-26 2015-08-11 9
USGS 50145000 RIO GRANDE DE ANASCO AT EL ESPINO, PR 1959-02-17 2003-06-25 48
USGS 50145500 RIO CASEI AT EL ESPINO, PR 1959-02-17 1966-04-18 7
USGS 50145600 RIO CASEY AT MOUTH, PR 2003-06-25 2015-08-12 11
USGS 50146000 RIO GRANDE DE ANASCO AT ANASCO, PR 1960-03-17 2024-02-22 226
USGS 50146100 RIO GRANDE DE ANASCO NR ANASCO, PR 1958-09-24 2007-03-07 41
USGS 50146120 CANO LA PUENTE NEAR TRES HERMANOS, ANASCO, PR 2006-03-02 2011-03-24 3
USGS 50146125 QUEBRADA LAYA AT HWY 115, ANASCO, PR 2006-03-02 2010-10-21 2
USGS 50146130 QUEBRADA JUSTO AT HWY 115, ANASCO, PR 2010-10-21 2010-10-21 1
USGS 50146135 QUEBRADA ICACOS AT HWY 115, ANASCO, PR 2010-10-21 2010-10-21 1
USGS 50146140 QUEBRADA CAGUABO AT HWY 115, ANASCO, PR 2006-03-02 2011-03-24 4
  group icon Cabo Rojo Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 175622067114902 PIEZOMETER 3, CABO ROJO, PR 1959-06-26 1959-07-20 2
USGS 175822067094600 MSAN 2 WELL, CABO ROJO, PR 1962-06-01 1962-06-01 1
USGS 175841067115400 HZEN WELL, CABO ROJO, PR 1959-05-14 1959-05-14 1
USGS 175848067120700 CAR 1 WELL, CABO ROJO, PR 1959-05-14 1959-05-14 1
USGS 175848067120701 CAR 2 WELL, CABO ROJO, PR 1959-05-14 1959-05-14 1
USGS 175851067084800 NIRI 5 WELL, CABO ROJO, PR 1959-05-20 1959-05-20 1
USGS 175859067103500 SROD WELL, CABO ROJO, PR 1959-05-15 1959-05-15 1
USGS 175910067112100 JFAS 7 WELL, CABO ROJO, PR 1959-05-15 1959-05-15 1
USGS 175911067094500 MSAN 4 WELL, CABO ROJO, PR 1959-05-20 1959-05-20 1
USGS 180013067090800 RIV WELL, CABO ROJO, PR 1962-05-09 1962-05-09 1
USGS 180015067090400 CAPITRANO WELL, CABO ROJO, PR 1986-03-24 1986-03-24 1
USGS 180045067072900 SAN WELL, CABO ROJO, PR 1986-03-24 1986-03-24 1
USGS 180047067063900 LHOU WELL, CABO ROJO, PR 1986-03-24 1986-06-19 2
USGS 180101067072400 COSTA LLANOS WELL, CABO ROJO, PR 1986-03-26 1986-03-26 1
USGS 180114067084900 LLANOS COSTA 1 WELL, CABO ROJO, PR 1962-05-09 1962-05-09 1
USGS 180121067082600 LLANOS COSTA 4 WELL, CABO ROJO, PR 1986-03-24 1986-03-24 1
USGS 180125067080500 PIEZOMETER SC-6, CABO ROJO, PR 1987-03-31 1987-04-01 2
USGS 180125067082400 LLANOS COSTA 3 WELL, CABO ROJO, PR 1986-03-24 1986-03-24 1
USGS 180215067083100 MON WELL, CABO ROJO, PR 1962-05-08 1962-05-08 1
USGS 180216067094000 VID WELL, CABO ROJO, PR 1962-05-08 1962-05-08 1
USGS 180524067092000 WELL, 3 C103 K3.9, CABO ROJO, PR 1986-03-26 1986-11-19 5
USGS 180527067092700 FER 1 WELL, CABO ROJO, PR 1961-10-25 1961-10-25 1
USGS 180542067084000 CABO ROJO P1 WELL, CABO ROJO, PR 2003-04-10 2008-04-17 5
USGS 180626067075100 MCD WELL, CABO ROJO, PR 1981-09-25 1993-03-08 6
USGS 180628067075802 PIEZOMETER CABO ROJO 2C, CABO ROJO, PR 1992-07-09 1992-07-09 2
USGS 180628067084300 PIEZOMETER CABO ROJO 9A, CABO ROJO, PR 1993-03-08 2004-01-15 2
USGS 180628067084302 PIEZOMETER CABO ROJO 9C, CABO ROJO, PR 2004-01-15 2004-01-15 1
USGS 180720067110200 PIEZOMETER JOYUDA 8, CABO ROJO, PR 1986-06-05 1988-01-07 26
USGS 180721067110200 PIEZOMETER JOYUDA 9, CABO ROJO, PR 1986-06-05 1988-01-07 27
USGS 180722067110200 PIEZOMETER JOYUDA 10, CABO ROJO, PR 1986-06-05 1988-01-07 26
USGS 180723067103600 PIEZOMETER JOYUDA 4, CABO ROJO, PR 1986-06-05 1988-01-06 26
USGS 180731067100500 MANGO WELL, CABO ROJO, PR 1986-05-07 1988-01-06 26
USGS 180732067102600 DIX WELL, CABO ROJO, PR 1986-06-05 1988-01-06 26
USGS 180735067102500 PIEZOMETER JOYUDA 5, CABO ROJO, PR 1986-06-05 1988-01-06 26
USGS 180750067101200 PIEZOMETER JOYUDA 6, CABO ROJO, PR 1986-06-05 1988-01-06 26
USGS 180753067085900 TERESA 1 WELL, CABO ROJO, PR 1967-04-26 1967-04-26 1
USGS 180816067103100 PIEZOMETER JOYUDA 7, CABO ROJO, PR 1986-06-05 1988-01-06 25
USGS 180817067102900 LUIS WELL, CABO ROJO, PR 1986-01-13 1987-07-07 16
USGS 180823067104500 PIEZOMETER JOYUDA 3, CABO ROJO, PR 1986-06-05 1988-01-07 24
USGS 180825067104800 PIEZOMETER JOYUDA 2, CABO ROJO, PR 1986-06-05 1988-01-07 26
USGS 180827067105100 PIEZOMETER JOYUDA 1, CABO ROJO, PR 1986-06-05 1988-01-07 26
USGS 180836067104200 ROS WELL, CABO ROJO, PR 1986-06-05 1988-01-06 26
USGS 50128950 CANAL DE RIEGO DE LAJAS NR BOQUERON, PR 1981-08-06 1981-12-03 3
USGS 50129820 ARROYO CAJUL AT HWY 303, CABO ROJO, PR 2010-10-19 2010-10-19 1
USGS 50129855 LAGUNA FRATERNIDAD NO.1 CABO ROJO PR 2011-11-16 2012-08-14 5
USGS 50129860 LAGUNA FRATERNIDAD NO.2 CABO ROJO PR 2011-11-16 2012-08-14 5
USGS 50129863 LAGUNA CABO ROJO NO.1 CABO ROJO PR 2011-11-16 2012-08-14 5
USGS 50129865 LAGUNA CABO ROJO NO.2 CABO ROJO PR 2011-11-16 2012-08-14 5
USGS 50129866 LAGUNA CANDELARIA NO.1 CABO ROJO PR 2011-11-15 2012-08-15 6
USGS 50129870 LAGUNA CANDELARIA NO.2 CABO ROJO PR 2011-11-15 2012-08-15 5
USGS 50129945 CANO BOQUERON NO.2 CABO ROJO PR 2001-12-13 2016-07-06 35
USGS 50129950 CANO BOQUERON NO.1 CABO ROJO PR 2011-11-15 2016-07-06 11
USGS 50130000 QUEBRADA BOQUERON AT BOQUERON, PR 2006-03-01 2011-03-22 3
USGS 50130020 LAGUNA GUANIQUILLA NO.2 CABO ROJO, PR 2011-11-15 2012-08-15 5
USGS 50130025 LAGUNA GUANIQUILLA NO.1 CABO ROJO PR 2011-11-15 2012-08-15 6
USGS 50130100 QUEBRADA GONZALEZ AT HWY 307, CABO ROJO, PR 2006-03-01 2011-03-22 3
USGS 50130150 QUEBRADA LOS PAJARITOS AT HWY 307, CABO ROJO, PR 2006-03-01 2011-03-22 3
USGS 50130200 QUEBRADA LAS PINAS AT HWY 308, CABO ROJO, PR 2006-03-01 2010-10-21 2
USGS 50130305 LAGUNA JOYUDA NO.1 CABO ROJO PR 2011-11-17 2012-08-16 10
USGS 50130325 QUEBRADA MANGO AT HWY 311, CABO ROJO, PR 2006-03-01 2011-03-24 2
USGS 50130335 LAGUNA JOYUDA NO.2 CABO ROJO PR 2011-11-17 2012-08-16 8
USGS 50135625 RIO VIEJO AT BENAVENTE, CABO ROJO, PR 2009-10-29 2024-02-21 54
USGS 50135650 RIO GUANAJIBO AT HWY 114, CABO ROJO, PR 2009-10-29 2010-02-25 2
USGS 50139500 RIO YAGUEZ NR MOUTH AT MAYAGUEZ, PR 1959-02-16 1979-08-16 42
  group icon Camuy Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182212066534200 SDOM WELL, CAMUY, PR 1981-03-02 1985-04-22 2
  group icon Guanica Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180000066532900 SANTA RITA 7 WELL, GUANICA, PR 1963-02-20 1981-10-21 3
USGS 180002066523800 WINDMILL W2 WELL, AT BO LA JOYA, GUANICA, PR 1981-10-20 1981-10-20 1
USGS 180006066531600 SANTA RITA 6 WELL, GUANICA, PR 1962-11-27 1967-07-29 4
USGS 180009066533000 NIC WELL, GUANICA, PR 1963-07-03 1963-07-03 1
USGS 180015066551600 ORT 1 WELL, GUANICA, PR 1963-06-13 1963-06-13 1
USGS 180016066542500 PIEZOMETER GUANICA 26, GUANICA, PR 1981-10-21 1981-10-21 1
USGS 180021066550700 VEGA WELL, GUANICA, PR 1963-07-03 1963-07-03 1
USGS 180022066543900 ECH 1 WELL, GUANICA, PR 1963-07-03 1963-07-03 1
USGS 180027066532500 MER WELL, GUANICA, PR 1963-07-03 1963-07-03 1
USGS 180027066542400 GAR 1 WELL, GUANICA, PR 1963-07-03 1963-07-03 1
USGS 180030066540200 SAN 1 WELL, GUANICA, PR 1963-02-03 1963-03-03 2
USGS 180032066551200 16 C ABANDONED CASING WELL, GUANICA, PR 1981-10-19 1981-10-19 1
USGS 180033066533300 ORT WELL, GUANICA, PR 1962-11-28 1963-07-28 3
USGS 180033066551100 PR LAND 2 WELL, GUANICA, PR 1956-07-16 1957-01-17 3
USGS 180041066532000 PIEZOMETER GUANICA 19, GUANICA, PR 1981-10-21 1981-10-21 1
USGS 180041066542600 FRATERNIDAD 1 WELL, GUANICA, PR 1986-03-27 1986-03-27 1
USGS 180041066542800 PIEZOMETER GUANICA 18, GUANICA, PR 1981-10-21 1981-10-21 1
USGS 180044066530100 SECO WELL, GUANICA, PR 1962-11-27 1963-06-16 2
USGS 180045066525500 SANTA RITA 5 BTR WELL, GUANICA, PR 1962-11-27 1963-07-29 3
USGS 180053066523700 SANTA RITA 2 WELL, GUANICA, PR 1963-01-23 1963-11-27 4
USGS 180053066551300 PR LAND 1 WELL, GUANICA, PR 1956-01-12 1956-05-14 9
USGS 180056066534600 PIEZOMETER GUANICA 24, GUANICA, PR 1981-10-22 1981-10-22 1
USGS 180122066560300 ARENAS 1 WELL, GUANICA, PR 1986-06-20 1986-06-20 1
USGS 50129100 RIO LOCO NR BO. SUSUA, PR 1958-09-24 1985-12-06 7
  group icon Hatillo Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182006066564600 SALTO COLLAZO SPRING NR SAN SEBASTIAN, HATILLO, PR 1982-12-01 1995-04-05 3
  group icon Hormigueros Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180729067070600 EUREKA 1 WELL, HORMIGUEROS, PR 1946-02-27 1946-02-27 1
USGS 50135000 RIO HOCONUCO (DUEY) NR SAN GERMAN, PR 1964-03-03 2015-08-11 17
USGS 50136400 RIO ROSARIO NR HORMIGUEROS, PR 1979-11-15 2014-06-28 1240
USGS 50136700 RIO ROSARIO AT MOUTH, HORMIGUEROS, PR 2009-10-30 2024-02-21 51
USGS 50138000 RIO GUANAJIBO NR HORMIGUEROS, PR 1958-09-24 2024-02-21 406
  group icon Isabela Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182402067010500 SALTOS 3 WELL, ISABELA, PR 1978-07-05 1978-07-05 1
USGS 182805067025800 E STATION NC-7 WELL, ISABELA, PR 1986-11-07 1986-11-10 2
USGS 182919067031300 ODAI NC-11 WELL, ISABELA, PR 1987-04-15 1987-05-07 8
  group icon Lajas Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180015067023500 LDDAI WELL, LAJAS, PR 1986-03-25 1986-06-20 2
USGS 180038067044900 MAGUAYO 5 WELL, LAJAS, PR 1962-05-08 1962-05-08 1
USGS 180041067043900 MAGUAYO 1 WELL, LAJAS, PR 1986-03-24 1986-03-24 1
USGS 180046067053700 LAGUNA CARTAGENA WELL, LAJAS, PR 1986-03-25 1986-03-25 1
USGS 180055067063300 PIEZOMETER LAGUNA CARTAGENA 3, LAJAS, PR 1986-04-25 1986-05-08 2
USGS 180055067063301 PIEZOMETER LAGUNA CARTAGENA 1, LAJAS, PR 1986-04-25 1986-06-19 3
USGS 180055067063302 PIEZOMETER LAGUNA CARTAGENA 2, LAJAS, PR 1986-04-25 1986-07-18 3
USGS 180055067063303 PIEZOMETER LAGUNA CARTAGENA 4, LAJAS, PR 1986-04-25 1986-07-18 2
USGS 180055067063304 PIEZOMETER LAGUNA CARTAGENA 5, LAJAS, PR 1986-03-31 1986-05-08 2
USGS 180055067063306 PIEZOMETER LAGUNA CARTAGENA 7, LAJAS, PR 2008-03-12 2008-04-17 2
USGS 180055067063308 PIEZOMETER LAGUNA CARTAGENA 8, LAJAS, PR 1986-06-19 1986-06-19 1
USGS 180055067063309 PIEZOMETER LAGUNA CARTAGENA 9, LAJAS, PR 1986-03-31 1986-06-19 3
USGS 180055067063310 PIEZOMETER LAGUNA CARTAGENA 10, LAJAS, PR 1986-05-08 1986-06-19 2
USGS 180100067010600 PIEZOMETER COSTA PLATA, LAJAS, PR 1986-03-25 1986-06-18 3
USGS 180103066583500 PIEZOMETER SALCEDO 1, LAJAS, PR 1986-06-18 1986-06-18 1
USGS 180103066583501 PIEZOMETER SALCEDO 2, LAJAS, PR 1986-06-18 1986-06-18 1
USGS 180103066583504 PIEZOMETER SALCEDO 4, LAJAS, PR 1986-06-18 1986-06-18 1
USGS 180103066583505 PIEZOMETER SALCEDO 5, LAJAS, PR 1986-06-18 1986-06-18 1
USGS 180103067042500 PIEZOMETER LAJAS EXPERIMENTAL STATION LAJAS, PR 1986-03-26 2008-04-17 10
USGS 180111067025200 PIEZOMETER GONZALEZ 1, LAJAS, PR 1986-05-27 1986-07-18 3
USGS 180111067025202 PIEZOMETER GONZALEZ 2, LAJAS, PR 1986-05-27 1986-06-19 2
USGS 180111067025204 PIEZOMETER GONZALEZ 4, LAJAS, PR 1986-05-08 1986-06-19 2
USGS 180111067025205 PIEZOMETER GONZALEZ 5, LAJAS, PR 1986-05-27 1986-05-27 1
USGS 180111067025206 PIEZOMETER GONZALEZ 3, LAJAS, PR 1986-07-18 1986-07-18 1
USGS 180117067001300 VALLE PLATA WELL, LAJAS, PR 1986-03-26 1986-03-26 1
USGS 180119067063500 DESENGANO 3 WELL, LAJAS, PR 1986-03-24 1986-03-24 1
USGS 180122067063500 DESENGANO 4 WELL, LAJAS, PR 1984-11-12 1986-03-24 2
USGS 180132067033800 VIV COLONIA AMISTAD WELL, LAJAS, PR 2003-03-05 2008-04-17 11
USGS 180132067045700 RESOLUCION NEW WELL, LAJAS, PR 1986-03-24 1986-03-24 1
USGS 180133067035000 PIEZOMETER SC-1 RASA, LAJAS, PR 1987-03-10 1987-03-10 5
USGS 180137066583700 GEL WELL, LAJAS, PR 1986-03-26 1986-03-26 1
USGS 180141067021700 LEONSILLO WELL, LAJAS, PR 1986-03-25 1986-03-25 1
USGS 180147066593000 LA PLATA 2 WINDMILL WELL, LAJAS, PR 1986-03-26 1986-03-26 1
USGS 180149066592400 LA PLATA 1 WINDMILL WELL, LAJAS, PR 1985-04-23 1985-04-23 1
USGS 180152066584500 EOJE WELL, LAJAS, PR 1981-09-26 1982-06-23 2
USGS 180153067010500 LUG WINDMILL WELL, LAJAS, PR 1986-03-26 1986-06-20 2
USGS 180201066592200 SILVA WELL, LAJAS, PR 1986-03-26 1986-03-26 1
USGS 180206067004900 HER WELL, LAJAS, PR 1986-03-26 1986-03-26 1
USGS 180212067003600 LAJAS JET PUMP WELL, LAJAS, PR 1986-03-26 1986-03-26 1
USGS 180227067015800 OLIVA 3 WELL, LAJAS, PR 1986-03-25 1986-03-25 1
USGS 180227067020400 YUYIN 2 WELL, LAJAS, PR 1986-03-25 1986-03-25 1
USGS 180229067005100 FELIU DOMESTIC WELL, LAJAS, PR 1985-04-26 1986-03-26 2
USGS 180229067005500 LUG 1 WELL, LAJAS, PR 1986-03-26 1986-03-26 1
USGS 180236067024700 CPAG WELL, LAJAS, PR 1986-06-20 1986-06-20 1
USGS 180239066595400 ALM WELL, LAJAS, PR 1986-03-26 1986-03-26 1
USGS 50129300 LAJAS EAST DRAINAGE CANAL NR ENSENADA, PR 1981-08-06 1982-01-13 5
  group icon Lares Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181240066501000 LAGO GUAYO 1 NR DAM, LARES, PR 1977-11-15 1977-12-05 4
USGS 50142250 RIO BLANCO ABOVE CONFLUENCE WITH RIO PRIETO, PR 2003-06-24 2015-08-18 10
USGS 50142710 RIO PRIETO AT RIO PRIETO, PR 2003-06-24 2010-02-24 6
USGS 50142900 RIO PRIETO AT PEZUELA, PR 2003-06-24 2015-08-18 11
  group icon Las Marias Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 50143150 RIO BUCARABONES NR LAS MARIAS, PR 2003-06-24 2007-08-28 3
USGS 50143200 RIO GUABA NR LAS MARIAS, PR 1960-03-18 2003-06-24 9
USGS 50143250 RIO GUABA AT CERROTE, PR 2007-03-08 2007-08-27 2
USGS 50143300 RIO GUABA NR HACIENDA ESPINO, PR 1959-02-17 1959-02-17 1
USGS 50143320 RIO GUABA AT MOUTH, PR 2009-10-30 2015-09-02 10
USGS 50143500 RIO MAYAGUECILLA AT LAS MARIAS, PR 1960-03-18 1966-04-13 8
USGS 50143600 RIO MAYAGUECILLA AT MOUTH, PR 2003-06-24 2015-08-12 11
USGS 50143895 RIO ARENAS UPSTREAM OF HIGHWAY 119, PR 2003-06-24 2003-06-24 1
USGS 50143900 RIO ARENAS AT LAS MARIAS, PR 2003-06-24 2003-06-24 1
USGS 50143920 RIO ARENAS AT MOUTH, PR 2003-06-26 2010-02-24 3
USGS 50143925 RIO GRANDE DE ANASCO BLW RIO ARENAS, PR 2003-06-25 2003-06-25 1
USGS 50145395 RIO CASEI ABV HACIENDA CASEI, PR 2003-12-25 2013-12-04 1276
  group icon Maricao Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 50143110 RIO GUABA AT BUCARABONES, PR 2007-03-07 2007-08-28 2
  group icon Mayaquez Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180937067091800 BMYE WELL, MAYAGUEZ, PR 2000-12-04 2001-11-27 4
USGS 181014067051600 CRO WELL, MAYAGUEZ, PR 2001-01-23 2001-11-26 3
USGS 181015067093800 COL WELL, MAYAGUEZ, PR 2000-01-25 2001-11-27 6
USGS 181018067091700 ROCHELAISE 5 WELL, MAYAGUEZ, PR 1965-01-07 1965-01-07 1
USGS 181019067072600 RIO HONDO WELL, MAYAGUEZ, PR 2000-12-04 2001-11-26 4
USGS 181035067094000 BRA 2 WELL, MAYAGUEZ, PR 1962-05-08 1962-05-08 1
USGS 181114067064700 SANTANA SPRING, MAYAGUEZ, PR 1959-08-27 1960-09-27 2
USGS 181153067063300 GALE II WELL, MAYAGUEZ, PR 1961-10-01 1961-10-01 1
USGS 181156067061300 HFLO WELL, MAYAGUEZ, PR 1961-10-01 1961-10-01 1
USGS 181156067074400 LAS MESAS MINERAL SPRING, MAYAGUEZ, PR 1960-09-27 1960-09-27 1
USGS 181215067084500 ROD 2 WELL, MAYAGUEZ, PR 1965-01-07 1965-01-07 1
USGS 181223067085100 RIV WELL, MAYAGUEZ, PR 1961-11-01 1966-06-09 4
USGS 181232067083500 CIND 3 WELL, MAYAGUEZ, PR 2000-12-05 2001-11-27 2
USGS 181232067083700 CIND 4 WELL, MAYAGUEZ, PR 2001-01-24 2001-04-24 2
USGS 181233067083200 VAL 1 WELL, MAYAGUEZ, PR 1961-11-01 1961-11-01 1
USGS 181313067075800 ZOO WELL, MAYAGUEZ, PR 2000-12-05 2001-11-26 4
USGS 181317067091400 MRES WELL, MAYAGUEZ, PR 2000-08-08 2001-11-28 5
USGS 181401067031900 JROD SPRING, MAYAGUEZ, PR 2000-08-09 2001-11-27 3
USGS 181538067103000 SANTA ROSA DE LIMA WELL, MAYAGUEZ, PR 2000-01-24 2001-11-27 5
USGS 181601067092600 ELIL 2 WELL, MAYAGUEZ, PR 2000-12-04 2000-12-04 1
USGS 181606067092800 ELIL 4 WELL, MAYAGUEZ, PR 2009-10-29 2010-02-25 2
USGS 181607067092400 ELIL 3 WELL, MAYAGUEZ, PR 2009-10-28 2010-02-25 3
USGS 50138150 RIO HONDO AT RIO HONDO, PR 2001-02-27 2001-07-18 2
USGS 50138230 RIO HONDO AT MOUTH NR CABO ROJO, PR 2009-10-30 2010-02-25 3
USGS 50138265 CANO MERLE NEAR CENTRAL ROCHELAISE, MAYAGUEZ, PR 2006-03-02 2015-04-07 14
USGS 50138275 QUEBRADA GUIFEN AT SABALOS, PR 2001-07-18 2001-07-18 1
USGS 50138285 QUEBRADA GRANDE AT QUEBRADA GRANDE, PR 2001-02-27 2001-02-27 1
USGS 50138375 CANO MAJAGUAL AT HWY 348, PR 2001-02-27 2001-07-18 2
USGS 50138385 CANO MAJAGUAL AT HWY 2, MAYAGUEZ, PR 2006-03-02 2011-03-24 3
USGS 50138500 RIO YAGUEZ AT PRESADA DE MAYAGUEZ, PR 1975-02-13 1979-08-16 30
USGS 50138760 TRIBUTARIO DE QUEBRADA GANDEL AT QUEMADO, PR 2000-12-06 2000-12-06 1
USGS 50138800 RIO YAGUEZ NR MAYAGUEZ, PR 1979-11-16 2012-08-09 165
USGS 50138815 QUEBRADA CARICOSA NR REPRESA DE MAYAGUEZ, PR 2001-02-28 2001-02-28 1
USGS 50138840 QUEBRADA CARICOSA NR MAYAGUEZ, PR 2001-02-28 2001-07-18 2
USGS 50138845 TRIBUTARIO DE QUEBRADA CARICOSA AT HWY 105, PR 2001-02-28 2002-02-21 3
USGS 50139000 RIO YAGUEZ AT MAYAGUEZ, PR 1960-03-17 2024-02-21 53
USGS 50139660 QUEBRADA DEL ORO AT HWY 102, MAYAGUEZ, PR 2006-03-02 2011-03-24 3
USGS 50139710 CANO BOQUILLA AT HWY 2, MAYAGUEZ, PR 2006-03-02 2011-03-24 3
USGS 50146005 RIO CANAS AT RIO CANAS ABAJO, PR 2009-10-28 2010-02-24 2
USGS 50146065 RIO CANAS NR MOUTH, PR 2003-06-25 2007-08-29 3
  group icon Moca Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 182310067070700 PRUNA SPRING, MOCA, PR 1960-09-02 1960-09-02 1
USGS 182311067030200 PER 2 SPRING, MOCA, PR 1960-09-02 1960-09-02 1
USGS 182320067034200 PUNTA BRAVA WELL, MOCA, PR 1963-03-13 1963-03-13 1
USGS 182330067022900 HERNANDEZ SPRING, MOCA, PR 1960-08-31 1960-08-31 1
USGS 182339067022900 VAZQUEZ 1 SPRING, MOCA, PR 1960-08-31 1960-08-31 1
USGS 182345067014000 DOM SPRING MOCA, PR 1960-08-26 1960-08-26 1
USGS 182349067024900 GREGORIO SPRING, MOCA, PR 1960-09-01 1960-09-01 1
USGS 182355067032400 BAU SPRING, MOCA, PR 1960-09-02 1960-09-02 1
USGS 182358067022400 ROCHA SPRING, MOCA, PR 1960-08-31 1960-08-31 1
USGS 182358067033500 FERRER SPRING, MOCA, PR 1960-09-01 1994-03-10 2
USGS 182358067040400 LASALLE SPRING, MOCA, PR 1960-09-01 1994-03-10 2
USGS 182407067022400 VELAZQUEZ SPRING, MOCA, PR 1960-08-31 1960-08-31 1
USGS 182407067022900 MENDEZ SPRING, MOCA, PR 1960-08-31 1960-08-31 1
USGS 182417067044300 QUI SPRING, MOCA, PR 1960-09-01 1960-09-01 1
USGS 182426067063600 LA PRESA SPRING, MOCA, PR 1960-09-02 1960-09-02 1
USGS 182546067040200 OJO DE VALENCIA SPRING, MOCA, PR 1960-09-23 1982-07-13 3
USGS 50147675 QUEBRADA LASALLE AT CAPA, PR 2003-03-06 2015-08-19 12
USGS 50147796 QUEBRADA LOS MORONES NR MOCA, PR 2007-03-07 2010-02-23 5
USGS 50147800 RIO CULEBRINAS AT HWY 404 NR MOCA, PR 1967-06-14 2011-02-15 83
USGS 50147900 QUEBRADA LAS MARIAS AT MARIAS, PR 2007-03-05 2015-08-17 10
USGS 50147997 QUEBRADA GRANDE NR MOCA, PR 2007-03-06 2015-08-17 10
USGS 50148050 RIO CULEBRINAS AT MARIAS, PR 2007-03-06 2010-02-23 4
  group icon Rincon Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181858067132700 CALVACHE VIEJO WELL, RINCON, PR 1958-08-08 1958-08-08 1
USGS 181913067123400 FELICIANO SPRING, RINCON, PR 1960-09-30 1960-09-30 1
USGS 182012067145600 CAR 1 WELL, RINCON, PR 1992-06-04 1992-06-04 1
USGS 182017067143300 RINCON 4 WELL, RINCON, PR 1967-04-01 2008-04-18 10
USGS 182152067161200 P-N WELL, RINCON, PR 1962-01-05 1962-01-05 1
USGS 182156067161000 P-N 3 WELL, RINCON, PR 1960-10-16 1960-10-16 1
USGS 182201067140600 ARENERO 1 WELL, RINCON, PR 1992-06-03 1992-06-03 1
USGS 50146145 CANO GARCIA AT HWY 429, RINCON, PR 2006-03-02 2011-03-24 3
USGS 50146150 QUEBRADA GRANDE DE CALBACHE AT HWY 429 RINCON, PR 2006-03-02 2015-08-11 16
USGS 50146155 QUEBRADA LOS RAMOS AT HWY 115, RINCON, PR 2006-03-02 2011-03-24 3
USGS 50146160 UNNAMED CREEK AT HWY 413, PR 2006-03-02 2010-10-21 2
USGS 50146165 QUEBRADA PILETAS AT HWY 413, RINCON, PR 2010-10-21 2011-03-24 2
USGS 50146170 UNNAMED CREEK AT PUNTA GORDA, PR 2010-10-21 2010-10-21 1
USGS 50146180 CANO SANTI PONCE NEAR RIO GRANDE, RINCON, PR 2006-03-02 2010-10-21 2
USGS 50146200 RIO GRANDE NR RINCON, PR 1960-03-22 2011-03-24 11
  group icon Sabana Grande Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180157066541200 IRI WELL, SABANA GRANDE, PR 1962-11-28 1963-08-06 3
USGS 180205066524400 SAMBOLIN 4 WELL, SABANA GRANDE, PR 1962-11-28 1963-07-29 3
USGS 180218066552400 SUS 4 WELL, SABANA GRANDE, PR 1986-03-27 1986-03-27 1
USGS 180224066540500 QUILINCHINI 1 WELL, SABANA GRANDE, PR 1962-11-28 1963-07-31 3
USGS 180231066582000 PRAWN 1 WELL, SABANA GRANDE, PR 1985-11-04 1985-11-04 1
USGS 180322066571201 SADI 2 WELL, SABANA GRANDE, PR 1962-05-10 1962-05-10 1
USGS 180543066565000 VIGEN DEL POZO WELL, SABANA GRANDE, PR 1982-12-02 1982-12-02 1
USGS 50129000 RIO LOCO NR YAUCO, PR 1962-11-27 1966-12-13 38
USGS 50130390 RIO COCO NR SAN ISIDRO, SABANA GRANDE, PR 2009-10-29 2010-02-25 2
USGS 50130420 RIO GRANDE NR SAN ISIDRO, SABANA GRANDE, PR 2009-10-29 2010-02-25 2
USGS 50130500 RIO GUANAJIBO AT LA PICA, PR 1974-08-20 1974-12-11 3
USGS 50131000 RIO CRUCES NR SABANA GRANDE, PR 1964-03-03 1967-04-04 6
  group icon San German Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180507067023200 PH WELL, SAN GERMAN, PR 1962-05-08 1962-05-08 1
USGS 50131050 RIO CRUCES NR SABANA GRANDE, SABANA GRANDE, PR 2009-10-29 2010-02-25 2
USGS 50131250 RIO GUANAJIBO AT MINILLAS, SAN GERMAN, PR 2009-10-29 2010-02-25 2
USGS 50131500 RIO GUANAJIBO NR SAN GERMAN, PR 1964-03-03 1965-02-06 3
USGS 50131800 RIO CUPEYES NR SAN GERMAN, PR 1960-03-17 2010-02-25 7
USGS 50131990 RIO GUANAJIBO AT HWY 119 AT SAN GERMAN, PR 1975-02-13 1979-08-16 30
USGS 50132000 RIO GUANAJIBO AT SAN GERMAN, PR 1964-03-03 1966-04-12 4
USGS 50133000 RIO CAIN NR SAN GERMAN, PR 1964-03-03 2010-02-25 5
USGS 50133600 RIO GUANAJIBO NEAR SAN GERMAN, PR 1979-11-15 2012-08-08 167
USGS 50134000 RIO DUEY AT DUEY BAJO, SAN GERMAN, PR 2009-10-29 2010-02-25 2
USGS 50134550 RIO HOCONUCO AT HOCONUCO BAJO, SAN GERMAN, PR 2009-10-29 2010-02-25 3
USGS 50136000 RIO ROSARIO AT ROSARIO, PR 1963-10-08 2010-02-25 31
  group icon San Sebastian Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 181818067012300 VAR SPRING, SAN SEBASTIAN, PR 1960-10-04 1960-10-04 1
USGS 182018066593200 SAN SEBASTIAN WELL, SAN SEBASTIAN, PR 1967-04-01 1967-04-01 1
USGS 182205066543600 LAGO GUAJATACA 3 NR RIO GUAJATACA, SAN SEBASTIAN,P 1977-11-10 1982-02-23 9
USGS 182218067001900 QUEBRADA BEJUCO SPRING, SAN SEBASTIAN, PR 1960-10-05 1960-10-05 1
USGS 182237067020500 VAZ SPRING, SAN SEBASTIAN, PR 1960-08-26 1960-08-26 1
USGS 182258066552000 LAGO GUAJATACA 2 NR CENTER/LAKE, SAN SEBASTIAN, PR 1977-11-10 1978-01-09 5
USGS 182258067020300 PER 1 WEST SPRING, SAN SEBASTIAN, PR 1960-08-26 1960-08-26 1
USGS 182312067010500 LINO SPRING, SAN SEBASTIAN, PR 1960-08-26 1960-08-26 1
USGS 182324067000300 MORALES SPRING, SAN SEBASTIAN, PR 1960-08-26 1960-08-26 1
USGS 182333067000900 ARR SPRING, SAN SEBASTIAN, PR 1960-08-26 1960-08-26 1
USGS 182338067001400 LOPEZ SPRING, SAN SEBASTIAN, PR 1960-08-30 1960-08-30 1
USGS 50010600 RIO GUAJATACA ABV LAGO DE GUAJATACA, PR 2012-11-13 2024-02-20 47
USGS 50143000 RIO GRANDE DE ANASCO NR LARES, PR 1959-02-02 2012-08-28 307
USGS 50143800 RIO GRANDE DE ANASCO NR LAS MARIAS, PR 1958-09-23 2007-08-28 13
USGS 50143930 RIO GRANDE DE ANASCO AT BO. GUACIO, PR 2005-08-27 2013-11-25 1131
USGS 50146675 RIO CULEBRINAS AT JUNCAL, PR 2007-03-05 2010-02-22 5
USGS 50146800 RIO CULEBRINAS AT HWY 119 AT SAN SEBASTIAN, PR 1958-04-01 2010-02-22 9
USGS 50147000 RIO CULEBRINAS AT SAN SEBASTIAN, PR 1962-02-20 1980-01-16 123
USGS 50147050 RIO CULEBRINAS AT COLINAS VERDES, PR 2007-03-06 2010-02-22 5
USGS 50147200 RIO GUATEMALA AT SAN SEBASTIAN, PR 1962-02-20 2015-08-20 16
USGS 50147400 RIO SONADOR NR SAN SEBASTIAN, PR 1962-02-20 2010-02-22 10
USGS 50147450 RIO SONADOR AT MOUTH, PR 2007-03-07 2015-08-20 10
USGS 50147475 QUEBRADA SALADA AT HIGHWAY 125, PR 2007-03-05 2015-08-19 10
USGS 50147595 QUEBRADA GRANDE AT POZAS, PR 2007-03-05 2015-09-02 11
USGS 50147600 RIO CULEBRINAS NR SAN SEBASTIAN, PR 1979-11-29 2012-08-29 166
USGS 50147630 QUEBRADA EL SALTO AT HATO ARRIBA, PR 2007-03-06 2015-08-19 12
  group icon Yauco Municipio, Puerto Rico
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 180103066523100 LAS PALOMAS 5 WELL, YAUCO, PR 1963-07-04 1963-07-04 1
USGS 180104066523201 LAS PALOMAS 3 WELL, YAUCO, PR 1962-11-20 1962-11-20 1
USGS 180104066523202 LAS PALOMAS 1 WELL, YAUCO, PR 1962-04-27 1963-04-09 2
USGS 180107066525100 GON 2 WELL, YAUCO, PR 1962-11-27 1962-11-27 1
USGS 50128500 RIO LOCO UPSTREAM FROM LAGO LOCO, PR 1959-02-13 1966-04-14 8
USGS 50129200 QUEBRADA SUSUA AT PALOMAS, PR 1962-11-27 1964-03-03 2