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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 -- 174 sites found


Hydrologic unit = 18050003
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 San Mateo County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 372200122150001 006S004W25N001M 2011-03-30 2011-03-30 3
USGS 372523122102401 LAKE LAGUNITA A STANFORD U A PALO ALTO CA 1997-04-30 1997-04-30 1
USGS 372524122111801 SAN FRANCISQUITO C A SU GOLF COURSE A PALO ALTO CA 1997-04-30 1997-04-30 1
USGS 372622122104401 SAN FRANCISQUITO C A SAN MATEO BIKE BR A PALO ALTO 1997-04-30 1997-04-30 1
USGS 372650122100901 SAN FRANCISQUITO C A ALMA ST A PALO ALTO CA 1997-04-30 1997-04-30 1
USGS 372716122080801 SAN FRANCISQUITO C DS OF NEWELL RD BR A PALO ALTO 2017-04-04 2017-05-15 25
USGS 372727122090001 SAN FRANCISQUITO C A WOODLAND AVE A PALO ALTO CA 1997-04-30 1997-04-30 1
  group icon Santa Clara County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 11164500 SAN FRANCISQUITO C A STANFORD UNIVERSITY CA 1958-01-10 2017-05-03 26
USGS 11166000 MATADERO C A PALO ALTO CA 1970-11-28 1970-12-02 6
USGS 11166575 PERMANENTE C NR MONTE VISTA CA 1984-11-08 1987-08-14 56
USGS 11166578 WF PERMANENTE C NR MONTE VISTA CA 1985-04-19 1986-04-07 35
USGS 11166655 TRIB AB JACQUES GULCH BL MEX CMP NR NEW ALM CA 1990-04-17 1990-04-17 1
USGS 11166710 ARROYO CALERO AB CALERO RES NR NEW ALMADEN CA 1986-07-24 1990-04-18 8
USGS 11166740 CALERO RES NR NEW ALMADEN CA 1982-08-17 1982-08-17 1
USGS 11166900 ALAMITOS C NR NEW ALMADEN CA 1985-01-15 1991-07-25 38
USGS 11167500 GUADALUPE C A GUADALUPE CA 1979-11-20 1991-07-24 165
USGS 11167572 GUADALUPE R A ALMTOS RCHG FAC AT SAN JOSE CA 1979-01-18 1990-08-27 172
USGS 11167700 ROSS C BL JARVIS RD NR SAN JOSE CA 1972-09-27 1974-03-01 46
USGS 11167800 GUADALUPE R AB ALMADEN EXPRESSWAY A SAN JOSE CA 2007-10-31 2011-04-26 53
USGS 11167970 LOS GATOS C AB LEXINGTON RE NR LOS GATOS CA 1978-06-16 1987-06-16 24
USGS 11168000 LOS GATOS C A LOS GATOS CA 1952-02-19 1991-07-24 327
USGS 11168660 LOS GATOS C A LARK A AT LOS GATOS CA 1979-01-17 1990-08-28 143
USGS 11168800 LOS GATOS C A LINCOLN AVE AT SAN JOSE CA 1979-11-20 1991-03-24 76
USGS 11169000 GUADALUPE R A SAN JOSE CA 1957-02-24 1991-07-24 254
USGS 11169025 GUADALUPE R ABV HWY 101 A SAN JOSE CA 2002-11-06 2022-12-03 1130
USGS 11169500 SARATOGA C A SARATOGA CA 1972-05-23 1972-12-07 11
USGS 11169580 CALABAZAS C TRIB AT MT EDEN RD NR SARATOGA CA 1972-09-24 1978-02-06 87
USGS 11169581 CALABAZAS C A MT EDEN RD NR SARATOGA CA 1973-03-06 1978-02-06 18
USGS 11169586 CALABAZAS C TRIB 3 A MT EDEN RD NR SARATOGA CA 1973-03-06 1978-02-06 17
USGS 11169588 CALABAZAS C TRIB 4 A MT EDEN RD NR SARATOGA CA 1973-03-06 1978-02-06 20
USGS 11169589 CALABAZAS C TRIB 5 AT PROSPECT RD NR SARATOGA CA 1973-03-06 1973-03-06 2
USGS 11169590 CALABAZAS C A VREGNA NR SARATOGA CA 1972-09-24 1972-11-13 5
USGS 11169600 PROSPECT C AT SARATOGA GOLF COURSE NR SARATOGA CA 1972-09-24 1978-02-06 47
USGS 11169610 PROSPECT C A MRA LA NR SARATOGA CA 1972-09-24 1978-02-06 20
USGS 11169611 PROSPECT C TRIB NR SARATOGA CA 1972-10-11 1978-02-06 12
USGS 11169616 CALABAZAS C A RAINBOW DRIVE NR CUPERTINO CA 1973-11-16 1978-02-06 91
USGS 11169800 COYOTE C NR GILROY CA 1965-11-24 2017-05-09 91
USGS 11169860 COYOTE C BL COYOTE RES NR SAN MARTIN CA 1987-03-17 1987-08-10 4
USGS 11169890 LAS ANIMAS C BL SAN FELIPE C NR MADRONE CA 1987-03-17 1987-03-17 1
USGS 11169970 COYOTE C BL LEROY ANDERSON DAM NR MADRONE CA 1979-11-21 1991-07-23 129
USGS 11170000 COYOTE C NR MADRONE CA 1952-03-17 2024-01-24 185
USGS 11171500 COYOTE C NR EDENVALE CA 1979-01-17 1991-03-24 118
USGS 11172175 COYOTE C AB HWY 237 A MILPITAS CA 2003-11-07 2022-09-15 247
USGS 370120121245701 010S005E27F001M 2022-09-15 2022-09-15 3
USGS 370419121284501 010S004E12Q001M 2022-10-05 2022-10-05 3
USGS 370800121580001 009S001W16P001M 2011-04-19 2011-04-19 3
USGS 370939121502701 ALMADEN RE A JACQUES GULCH NR NEW ALMADEN CA 1990-04-17 1990-04-17 1
USGS 370952121493901 ALMADEN RE A DAM NR NEW ALMADEN CA 1990-04-17 1990-09-20 12
USGS 370957121493601 ALAMITOS C A ALMADEN R A OUT NR NEW ALMADEN CA 1990-07-27 1990-09-19 2
USGS 370958121373901 ANDERSON LK A DAM NR MADRONE CA 1987-03-18 1987-08-13 132
USGS 371000121390001 009S003E09F001M 2007-04-30 2017-06-14 4
USGS 371000121390002 009S003E09F002M 2022-04-06 2022-04-06 1
USGS 371000121460001 009S002E08B001M 2011-04-07 2021-07-20 7
USGS 371000121580001 009S001W09B001M 2011-04-05 2011-04-05 2
USGS 371024121593301 LEXINGTON RES A S END NR LOS GATOS CA 1978-06-16 1980-05-29 61
USGS 371046121590701 LEXINGTON RE NR S END NR LOS GATOS CA 1978-08-22 1980-09-23 73
USGS 371047121472201 CALERO RES A ALMADEN-CALERO CN NR NEW ALMA CA 1990-04-18 1990-04-18 1
USGS 371049121472501 ALMADEN-CALERO CN NR NEW ALMADEN CA 1980-12-09 1983-06-16 8
USGS 371057121465701 CALERO RES A CENTER NR NEW ALMADEN CA 1980-12-09 1984-08-29 396
USGS 371057121472501 CALERO RES A DAM NR NEW ALMADEN CA 1980-12-09 1991-09-05 1113
USGS 371100122010001 008S001W31F001M 2011-04-05 2011-04-05 3
USGS 371101121461701 CALERO RES A E END NR NEW ALMADEN CA 1980-12-09 1983-09-07 156
USGS 371107121463401 CALERO RES NR E END NR NEW ALMADEN CA 1982-12-07 1982-12-07 9
USGS 371108121591701 LEXINGTON RES A CENTER NR LOS GATOS CA 1978-06-15 1984-03-22 258
USGS 371140121521701 GUADALUPE RES A ENRIQUITA MINE NR NW ALMADN CA 1990-04-17 1990-04-17 1
USGS 371156121523901 GUADALUPE RES A DAM NR NEW ALMADEN CA 1990-04-17 1990-09-20 13
USGS 371157121591201 LEXINGTON RES A DAM NR LOS GATOS CA 1978-06-15 1987-07-16 660
USGS 371158121524801 GUADALUPE C A OL GUADALUPE RE NR NEW ALMADEN CA 1990-07-27 1990-09-20 2
USGS 371300121440001 008S002E22R001M 2007-04-24 2007-04-24 3
USGS 371357121454601 008S002E16P002M 2007-04-23 2007-04-23 3
USGS 371417121480701 008S002E18E011M 2001-08-07 2001-08-07 1
USGS 371451121484701 008S001E12P001M 2001-06-28 2001-06-28 1
USGS 371500121520001 008S001E04M001M 2007-05-01 2007-05-01 3
USGS 371502121464901 008S002E08Q002M 2001-06-28 2001-06-28 1
USGS 371527121472201 008S002E07A012M 2001-08-09 2001-08-09 1
USGS 371529121490101 008S001E11A004M 2001-08-07 2007-04-23 4
USGS 371554121474101 COYOTE C A COYOTE RD NR SAN JOSE CA 2017-03-14 2017-05-10 20
USGS 371600122000001 008S001W06F001M 2007-06-18 2007-06-18 3
USGS 371620122005801 SARATOGA C A BRAEMAR DR A SARATOGA CA 2017-03-15 2017-05-03 26
USGS 371654121574301 007S001W34F001M 2001-07-30 2001-07-30 1
USGS 371658121525501 007S001E32G003M 2001-06-27 2001-06-27 1
USGS 371658121573802 007S001W34F003M 2007-05-02 2011-03-21 6
USGS 371659121525202 007S001E32G002M 2007-05-01 2007-05-01 3
USGS 371700122060001 007S002W29G001M 2011-04-06 2011-04-06 3
USGS 371725121560303 007S001W26R004M 2001-07-30 2001-07-30 1
USGS 371738121555901 LOS GATOS C A E HAMILTON AVE NR CAMPBELL CA 2017-03-15 2017-05-04 24
USGS 371756121525001 007S001E29A001M 2001-06-26 2001-06-26 1
USGS 371801121501401 007S001E26D002M 2001-08-01 2017-06-13 5
USGS 371802121595001 007S001W29C003M 2003-09-18 2003-09-18 1
USGS 371802121595003 007S001W29C005M 2003-09-30 2003-09-30 1
USGS 371802121595004 007S001W29C006M 2003-09-17 2003-09-17 1
USGS 371809121555601 007S001W23R003M 2001-06-28 2022-04-05 5
USGS 371814121525601 GUADALUPE R A WILLOW GLEN WAY NR SAN JOSE CA 2017-03-14 2017-05-04 22
USGS 371834121574902 007S001W22E002M 2000-05-31 2001-06-19 7
USGS 371835121574903 007S001W22E003M 2001-07-30 2001-07-30 1
USGS 371837121574710 007S001W22E011M 2007-05-02 2017-06-13 4
USGS 371840121503701 007S001E22H006M 2007-04-25 2007-04-25 3
USGS 371845121574611 007S001W22E012M 2001-07-30 2001-07-30 1
USGS 371858121475003 007S002E19C007M 2003-09-22 2003-09-22 1
USGS 371858121475005 007S002E09C009M 2003-09-22 2003-09-22 1
USGS 371858121541101 007S001E19B003M 2001-04-24 2001-04-24 1
USGS 371900121450001 007S002E16R001M 2007-06-06 2007-06-06 3
USGS 371913121541201 007S001E18P001M 2001-06-25 2001-06-25 1
USGS 371913122004901 007S001W18K001M 2001-08-01 2001-08-01 1
USGS 371915121550402 007S001W13K004M 2001-06-27 2001-06-27 1
USGS 371926121531901 007S001E17F002M 2001-06-27 2001-06-27 1
USGS 371926121555003 007S001W13E004M 2001-08-01 2001-08-01 1
USGS 371940121525901 007S001E16C008M 2001-06-18 2022-04-05 5
USGS 371944121561301 007S001W14B001M 2001-06-27 2001-06-27 1
USGS 371955121535101 007S001E07R004M 2001-06-26 2001-06-26 1
USGS 372002122000201 007S001W08N001M 2007-04-25 2007-04-25 3
USGS 372004122035201 STEVENS C A BARRANCA DR A MONTA VISTA CA 2015-08-05 2017-01-10 12
USGS 372009122052001 olf CA 1987-02-12 1987-02-12 1
USGS 372012121521001 007S001E09L004M 2001-08-30 2007-05-08 4
USGS 372012121521002 007S001E09L005M 2001-08-29 2007-05-09 4
USGS 372012121521003 007S001E09L006M 2001-08-29 2007-05-09 4
USGS 372012121521004 007S001E09L007M 2001-08-29 2007-05-10 4
USGS 372012121521005 007S001E09L008M 2001-08-28 2007-05-07 4
USGS 372015122025101 007S002W11G002M 2007-05-22 2007-05-22 3
USGS 372029122012401 007S002W12A001M 2007-04-23 2007-04-23 3
USGS 372031121593101 007S001W08B002M 2007-04-26 2007-04-26 3
USGS 372042121522501 007S001E09D003M 2001-06-26 2007-06-14 4
USGS 372042121522901 007S001E09D009M 2001-06-26 2001-06-26 1
USGS 372042121580601 007S001W10D010M 2001-08-02 2001-08-02 1
USGS 372048122041401 007S002W03P001M 2001-08-16 2001-08-16 1
USGS 372054121591101 007S001W04N002M 2007-04-26 2007-04-26 3
USGS 372054122010301 007S001W06P001M 2001-08-01 2001-08-01 1
USGS 372100121560001 007S001W02G024M 2007-04-25 2007-04-25 3
USGS 372102122020501 007S002W01L001M 2001-08-01 2001-08-01 1
USGS 372109122022001 007S002W01E003M 2001-07-31 2001-07-31 1
USGS 372109122034901 007S002W03H001M 2001-07-31 2001-07-31 1
USGS 372110121561401 007S001W02G029M 2001-08-02 2001-08-02 1
USGS 372113121590701 007S001W04E002M 2007-04-30 2007-04-30 3
USGS 372119122033201 007S002W02E002M 2007-05-22 2007-05-22 3
USGS 372121121571001 007S001W03H002M 2007-04-26 2007-04-26 3
USGS 372123121562201 007S001W02B001M 2001-08-02 2001-08-02 1
USGS 372130122042301 007S002W03D002M 1974-01-26 1977-08-17 6
USGS 372141121591101 006S001W33N001M 2007-04-25 2022-04-21 8
USGS 372149122035301 006S002W34K002M 2001-07-19 2001-07-20 3
USGS 372205122035601 006S002W34G002M 2001-07-31 2001-07-31 1
USGS 372207121525701 006S001E32G001M 2001-06-25 2007-04-26 4
USGS 372210121520501 006S001E33F006M 2001-06-26 2007-05-01 4
USGS 372212121591401 006S001W32H001M 2001-08-02 2001-08-02 1
USGS 372219122064301 006S002W32D001M 2001-07-31 2001-07-31 1
USGS 372224122051501 006S002W33C001M 2001-08-08 2007-05-03 4
USGS 372259122040101 006S002W27G002M 2001-08-14 2001-08-14 1
USGS 372303121542901 COYOTE C BL CHARCOT AVE NR SAN JOSE CA 2017-04-03 2017-05-11 27
USGS 372303122062101 006S002W29B002M 2001-07-31 2001-07-31 1
USGS 372315121565201 006S001W26D002M 2001-08-02 2007-04-30 4
USGS 372329122040701 006S002W22P002M 2001-08-08 2001-08-08 1
USGS 372332122062101 006S002W20L003M 2001-07-31 2001-07-31 1
USGS 372341122074301 006S002W19M010M 2001-07-31 2001-07-31 1
USGS 372342122074201 006S002W19M001M 2001-07-31 2001-07-31 1
USGS 372347122040301 006S002W22G009M 2001-08-09 2011-03-22 7
USGS 372349122065801 006S002W19H002M 2001-08-01 2001-08-01 1
USGS 372400121510001 006S001E16K006M 2007-05-02 2007-05-02 3
USGS 372400121550001 006S001W24B001M 2007-06-05 2007-06-05 3
USGS 372407121550801 006S001W24B005M 2001-08-09 2001-08-09 1
USGS 372423121554601 006S001W13F006M 2001-06-28 2001-06-28 1
USGS 372435121515901 006S001E16K005M 2001-06-25 2001-06-25 1
USGS 372500122081201 MATADERO C A JOSINA AVE A PALO ALTO CA 2017-03-16 2017-05-02 20
USGS 372545122092001 006S003W11B010M 1997-05-02 1997-05-02 1
USGS 372616122105301 006S003W03M010M 1997-05-02 1997-05-02 1
USGS 372625122081301 006S003W01G001M 1997-04-28 1997-04-28 1
USGS 372631122091001 006S003W02H010M 1997-04-28 1997-04-28 1
USGS 372640122082401 006S003W01B002M 1997-05-01 2001-08-08 2
USGS 372701122083401 005S003W36P002M 2003-04-15 2003-04-15 1
USGS 372701122083402 005S003W36P003M 2003-04-15 2003-04-15 1
USGS 372701122083403 005S003W36P004M 2003-04-14 2003-04-14 1
USGS 372701122083404 005S003W36P005M 2003-04-14 2003-04-14 1
USGS 372703122083201 005S003W36L010M 1997-04-28 1997-04-28 1
USGS 372708122070801 005S002W31K001M 1980-07-03 1980-12-31 4
USGS 372720122091501 005S003W35G010M 1997-05-01 2001-08-08 2
USGS 372727122084001 005S003W36F002M 1997-04-28 1997-04-28 1