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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 -- 230 sites found


Hydrologic unit = 18060002
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 Monterey County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 364747121230801 013S005E12E001M 1971-08-10 1971-08-10 1
USGS 365100121482901 PAJARO R ESTUARY A MOUTH NR WATSONVILLE CA 2008-01-06 2009-10-28 20
USGS 365102121472601 012S002E31C002M 1971-08-06 1971-08-06 1
USGS 365117121473601 012S002E30P002M 2013-03-05 2023-02-01 4
USGS 365119121473801 012S002E30N001M 1971-08-06 1971-08-06 1
USGS 365131121473701 012S002E30M002M 1971-08-18 1971-08-18 1
USGS 365140121480101 PAJARO R ESTUARY NR WATSONVILLE CA 2008-01-06 2009-10-28 20
USGS 365159121480801 MONTEREY DRAINAGE DITCH NR WATSONVILLE CA 2008-01-06 2009-10-28 19
USGS 365206121474301 012S002E31E001M 1998-12-14 1998-12-14 1
USGS 365206121474302 012S002E31E002M 1998-12-14 1998-12-14 1
USGS 365241121471001 012S002E19A002M 1971-08-11 1971-08-11 1
USGS 365247121473301 PAJARO R BL THURWATCHER RD NR WATSONVILLE CA 1998-08-25 2009-10-28 20
USGS 365255121445801 012S002E16Q001M 1971-08-18 1971-08-18 1
USGS 365256121381801 012S003E21B001M 1971-08-10 1971-08-10 1
USGS 365310121444901 012S002E16J001M 1971-08-18 1971-08-18 1
USGS 365318121394601 012S003E17K001M 2013-02-06 2013-02-06 2
USGS 365324121452401 012S002E16F001M 1971-08-18 1971-08-18 1
USGS 365330121443501 012S002E15E001M 1971-08-18 1971-08-18 1
USGS 365338121412301 012S003E18E004M 1971-06-09 1971-06-09 1
USGS 365339121384201 012S003E16C002M 1971-08-19 1971-08-19 1
USGS 365408121414401 012S002E12K001M 1971-08-11 1971-08-11 1
USGS 365412121402401 012S003E07J002M 1971-06-10 1971-08-18 2
USGS 365413121432201 012S002E11E004M 1971-08-11 1971-08-11 1
USGS 365417121421201 012S002E12E001M 1971-06-09 1971-06-09 1
USGS 365425121443601 012S002E10D001M 1971-08-10 1971-08-10 1
USGS 365429121411301 012S003E07D001M 2005-09-19 2005-09-19 3
USGS 365433121400401 012S003E08C001M 1971-08-19 1971-08-19 1
  group icon San Benito County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 11154700 CLEAR C NR IDRIA CA 1993-11-30 2011-07-20 445
USGS 11156500 SAN BENITO R NR WILLOW CREEK SCHOOL CA 1960-10-05 1977-08-15 59
USGS 11157500 TRES PINOS C NR TRES PINOS CA 1977-08-15 1977-08-15 1
USGS 361931120370901 BIG RIDGE CHROMIUM MINE NR IDRIA CA 1997-07-24 1997-07-24 3
USGS 361945120373801 ASBESTOS RDG MINE SITE NR IDRIA CA 1997-07-24 1997-07-24 1
USGS 361952120372601 SAN BENITO R AB BIG RDG CHROMIUM MINE NR IDRIA CA 1997-07-24 1997-07-24 3
USGS 361954120371601 SAN BENITO R BL KCAC JOE PIT MINE TRIB NR IDRIA CA 1997-07-24 1997-07-24 1
USGS 362008120375401 SAN BENITO R BL UNNAMED TRIB AB ASBESTOS RDGE MINE 1997-07-24 1997-07-24 1
USGS 362023120395301 SAN BENITO R BL SAN BENITO MILL SITE NR IDRIA CA 1997-07-24 1997-07-24 2
USGS 362032120393301 SAN BENITO R BL SAWMILL C NR IDRIA CA 1997-07-24 1997-07-24 2
USGS 362035120395101 SAN BENITO MILL DIG SITE NR IDRIA CA 1997-07-24 1997-07-24 1
USGS 362037120394701 SAN BENITO R TRIB BL SAWMILL C NR IDRIA CA 1997-07-24 1997-07-24 1
USGS 362037120395001 SAN BENITO MILL SITE NR IDRIA CA 1997-07-24 1997-07-24 1
USGS 363845121001001 015S009E04NU01M 2022-08-02 2022-08-02 3
USGS 363911121083601 015S008E06QU01M 2022-08-31 2022-08-31 3
USGS 364604121181501 013S006E27N001M 2008-08-19 2008-08-19 3
USGS 364704121194601 013S006E20R001M 2022-09-14 2022-09-14 3
USGS 364742121192801 013S006E21DU01M 2022-08-17 2022-08-17 3
USGS 364802121290501 013S004E13LU01M 2022-08-01 2022-08-01 3
USGS 364822121232601 013S005E14FU01M 2022-08-15 2022-08-15 3
USGS 364824121302301 013S004E14DU01M 2022-10-20 2022-10-20 3
USGS 364931121231901 013S005E02QU04M 2022-08-02 2022-08-02 3
USGS 365000121230001 013S005E02B001M 2008-08-21 2008-08-21 3
USGS 365000121250001 013S005E04G002M 2008-08-20 2008-08-20 3
USGS 365000121310001 012S004E34N001M 2008-08-13 2008-08-13 3
USGS 365005121121501 013S005E04HU01M 2022-08-16 2022-08-16 3
USGS 365028121312901 012S004E34NU02M 2022-10-03 2022-10-03 3
USGS 365033121275601 012S005E31PU01M 2022-10-19 2022-10-19 3
USGS 365105121291801 012S004E36DU01M 2022-08-16 2022-08-16 3
USGS 365150121221801 012S005E25F002M 2008-08-13 2008-08-13 3
USGS 365200121250001 012S005E21N001M 2008-08-13 2008-08-13 3
USGS 365200121330001 012S004E19E001M 2008-08-19 2018-07-26 7
USGS 365216121240001 012S005E22RU02M 2022-10-04 2022-10-04 3
USGS 365230121342401 012S004E19LU01M 2022-08-30 2022-08-30 3
USGS 365317121233901 012S005E14M002M 2008-08-21 2008-08-21 3
USGS 365400121350001 012S003E12K001M 2011-05-04 2011-05-04 3
USGS 365500121210001 012S006E06F001M 2008-08-21 2008-08-21 3
USGS 365505121232801 011S005E34FU09M 2022-08-03 2022-08-03 3
USGS 365600121240001 011S005E27F001M 2008-08-14 2008-08-14 3
USGS 365630121214701 011S006E30NU05M 2022-09-01 2022-09-01 3
USGS 365633121262901 011S005E29QU01M 2022-08-31 2022-08-31 3
USGS 365634121264001 TEQUISQUITA SLOUGH A SHORE RD NR DUNNEVILLE CA 2017-03-16 2017-07-11 26
USGS 365710121245501 011S005E27NU08M 2022-08-04 2022-08-04 3
USGS 365736121250801 PACHECO C A SAN FELIPE RD NR DUNNEVILLE CA 2017-03-16 2017-07-11 25
  group icon Santa Clara County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 11153470 LLAGAS C AB CHESBRO RES NR MORGAN HILL CA 1971-12-24 2017-05-10 69
USGS 11153500 LLAGAS C NR MORGAN HILL CA 1979-01-18 1991-07-23 141
USGS 11153530 LLAGAS C A MACHADO SCH NR MORGAN HILL CA 1979-11-21 1990-08-29 120
USGS 11153555 LLAGAS C A SAN MARTIN CA 1979-01-18 1991-07-23 116
USGS 11153650 LLAGAS C NR GILROY 2017-03-14 2017-07-11 30
USGS 11153900 UVAS C AB UVAS RES NR MORGAN HILL CA 1965-11-14 1976-02-29 68
USGS 11154000 UVAS C NR MORGAN HILL CA 1960-10-05 1966-09-07 59
USGS 365800121330001 011S004E17M001M 2008-08-14 2008-08-14 3
USGS 365803121323301 011S004E21D007M 2022-08-03 2022-08-03 3
USGS 365955121350601 UVAS C A MILLER AVE A GILROY CA 2017-03-14 2017-07-11 27
USGS 370000121310001 011S004E03P001M 2008-08-19 2008-08-19 3
USGS 370000121330001 011S004E05C001M 2008-08-12 2018-07-25 7
USGS 370000121330002 011S004E05C002M 2008-08-12 2008-08-12 3
USGS 370000121420001 011S002E02E001M 2011-05-03 2021-07-20 7
USGS 370009121402401 011S003E06D001M 2022-10-18 2022-10-18 3
USGS 370100121330001 010S004E32E004M 2008-10-27 2008-10-27 3
USGS 370100121330002 010S004E32E005M 2008-10-27 2008-10-27 3
USGS 370100121330003 010S004E32E006M 2008-10-27 2008-10-27 3
USGS 370126121301001 010S004E35F002M 2022-09-13 2022-09-13 3
USGS 370203121403501 010S003E30HU01M 2022-08-30 2022-08-30 3
USGS 370213121370001 010S003E26E011M 2022-08-18 2022-08-18 3
USGS 370300121350001 010S003E24A001M 2008-08-18 2018-07-24 4
USGS 370313121323801 010S004E21D003M 2022-09-13 2022-09-13 3
USGS 370316121143101 010S007E19BU01M 2022-10-19 2022-10-19 2
USGS 370400121350001 010S003E12M001M 2008-08-14 2008-08-14 3
USGS 370400121412601 UVAS RES A DAM NR MORGAN HILL CA 1988-04-12 1988-08-16 82
USGS 370500121470001 010S002E06Q001M 2007-06-18 2007-06-18 3
USGS 370500121470002 010S002E06R001M 2011-04-18 2011-04-18 2
USGS 370512121361901 LLAGAS C A SAN MARTIN AVE A SAN MARTIN CA 2017-03-13 2017-05-09 25
USGS 370520121340401 010S004E06R008M 2022-10-05 2022-10-05 3
USGS 370600121380001 009S003E34D006M 2008-08-11 2008-08-11 3
USGS 370625121370401 009S003E35M020M 2022-08-29 2022-08-29 3
USGS 370658121421601 009S002E25Q500M 2022-08-17 2022-08-17 3
USGS 370700121350001 009S003E25M001M 2008-08-18 2008-08-18 3
USGS 370700121370001 009S003E22P004M 2008-08-11 2018-07-25 4
USGS 370702121393901 009S003E29NU01M 2022-10-04 2022-10-04 3
USGS 370810121253501 Coit Lake in Henry Coe St Park nr Gilroy, CA 2009-07-28 2009-07-28 24
USGS 370852121364701 009S003E14P005M 2022-09-12 2022-09-12 2
USGS 370900121450101 009S002E16J001M 2022-09-14 2022-09-14 3
  group icon Santa Cruz County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 11159000 PAJARO R A CHITTENDEN CA 1952-02-19 2017-07-11 479
USGS 11159150 CORRALITOS C NR CORRALITOS CA 1977-08-19 2015-08-31 2
USGS 11159200 CORRALITOS C A FREEDOM CA 1976-01-09 2017-07-11 51
USGS 11159500 PAJARO R A WATSONVILLE CA 1977-08-19 2017-07-11 28
USGS 365129121482001 012S001E25G001M 1971-06-09 1983-09-08 56
USGS 365142121483601 012S001E25F001M 1971-06-09 1983-09-08 58
USGS 365152121482301 012S001E25B003M 1971-08-04 1983-08-09 34
USGS 365200121485901 WATSONVILLE SLOUGH NR WATSONVILLE CA 2008-01-07 2009-10-28 19
USGS 365202121490101 012S001E23R001M 1978-10-11 1979-08-14 11
USGS 365205121482501 012S001E24Q001M 1978-11-17 1983-09-08 34
USGS 365206121490001 012S001E23R002M 1998-08-27 1998-08-27 1
USGS 365206121490002 012S001E23R003M 1998-08-27 1998-08-27 1
USGS 365206121490003 012S001E23R004M 1998-08-27 1998-08-27 1
USGS 365207121484001 012S001E24L001M 1971-08-12 1983-08-09 30
USGS 365216121482501 012S001E24L003M 1971-08-04 1983-08-10 46
USGS 365218121490301 012S001E23J004M 1981-04-23 2020-08-19 37
USGS 365222121483301 AG DRAIN EAST OF SHELL RD NR WATSONVILLE CA 1998-08-26 1998-08-26 1
USGS 365231121482801 012S001E24G001M 1971-06-09 1981-09-14 34
USGS 365234121475601 012S001E24H001M 1981-06-09 1983-09-08 26
USGS 365235121490001 012S001E24N001M 1971-06-10 1982-03-09 3
USGS 365236121481301 AG DRAIN W OF SAN ANDREAS RD NR WATSONVILLE CA 1998-08-26 1998-08-26 1
USGS 365255121475801 012S001E13R001M 1978-10-11 1983-08-10 36
USGS 365259121474801 012S002E18N001M 1998-12-16 1998-12-16 1
USGS 365259121474802 012S002E18N002M 1998-08-26 1998-12-17 2
USGS 365259121474803 012S002E18N003M 1998-08-26 1998-12-17 2
USGS 365259121474804 012S002E18N004M 1998-08-26 1998-12-17 2
USGS 365312121470501 012S002E18K003M 1971-06-09 1983-08-10 12
USGS 365316121472701 012S002E18L001M 1979-08-23 1980-08-15 3
USGS 365317121484901 012S001E13M001M 1998-08-25 1998-08-25 1
USGS 365324121480401 WATSONVILLE SL AB HARKIN SL PUMP NR WATSONVILLE CA 1998-08-26 1998-08-26 1
USGS 365332121475001 012S002E18D001M 1971-06-09 1983-08-18 34
USGS 365355121491001 012S001E11R001M 1998-08-25 1998-08-25 1
USGS 365355121491002 012S001E11R002M 1998-08-25 1998-08-25 1
USGS 365355121491003 012S001E11R003M 1998-08-25 1998-08-25 1
USGS 365401121461301 012S002E08K002M 1979-04-12 1983-08-05 10
USGS 365405121492101 012S001E11K001M 1981-04-24 1983-08-18 8
USGS 365407121462901 012S002E08G003M 1979-04-20 1980-08-08 3
USGS 365409121461101 012S002E08K003M 1978-11-17 1980-08-18 4
USGS 365414121385001 012S003E09F002M 1971-08-18 1983-08-08 30
USGS 365415121471501 012S002E07G001M 2013-04-25 2013-04-25 3
USGS 365420121484601 012S001E12E001M 1978-11-07 1982-08-13 13
USGS 365425121452201 012S002E09C002M 1981-04-23 2020-08-19 34
USGS 365425121490501 012S001E11A002M 1978-10-12 1983-09-01 44
USGS 365436121403701 012S003E07B001M 1979-04-19 1983-08-08 10
USGS 365438121403901 012S003E07B002M 2005-09-20 2005-09-20 3
USGS 365440121481901 012S001E01R001M 1978-10-12 1981-03-17 29
USGS 365442121465001 012S002E05N001M 1978-11-07 1980-04-14 5
USGS 365446121412001 012S003E06N002M 1978-10-10 1983-08-08 53
USGS 365448121483501 012S001E01L001M 1979-04-16 1983-08-17 12
USGS 365500121470001 011S002E31R002M 2005-08-15 2020-08-19 7
USGS 365503121430601 012S002E02L001M 1978-11-27 1983-08-15 11
USGS 365512121474801 012S002E06E002M 1978-11-17 1980-11-11 7
USGS 365513121423601 012S002E02H004M 1971-08-18 1971-08-18 1
USGS 365518121423601 012S002E02H003M 1979-04-19 1983-08-15 10
USGS 365522121402201 012S003E06A001M 1971-06-10 1983-08-08 12
USGS 365522121474301 012S002E06D002M 1978-11-17 1979-08-17 3
USGS 365527121483901 012S001E01C002M 1978-10-12 1983-08-16 33
USGS 365528121435001 012S002E03A002M 1971-08-18 1983-08-15 5
USGS 365534121473901 011S002E31P003M 1971-08-05 1982-08-13 11
USGS 365541121405801 011S003E31P001M 2013-02-12 2018-04-03 3
USGS 365545121421401 011S002E36M001M 1971-08-19 1983-08-08 35
USGS 365546121424601 011S002E36M003M 1978-11-27 1980-11-13 7
USGS 365549121440001 011S002E34K001M 1979-04-19 1983-08-15 10
USGS 365551121440001 011S002E34K002M 1971-08-11 1971-08-11 1
USGS 365601121454001 011S002E33E001M 1971-08-05 1983-08-11 10
USGS 365604121415901 011S002E36F001M 1971-08-10 1980-11-13 7
USGS 365609121425001 011S002E35H002M 1978-11-27 1983-08-08 10
USGS 365613121444101 011S002E34D002M 1979-11-19 1983-08-15 5
USGS 365613121482501 011S001E36G001M 1983-08-16 1983-08-16 1
USGS 365613121482502 011S001E36G002M 1981-08-13 1982-08-16 2
USGS 365619121445501 011S002E33A004M 1978-11-22 1981-08-14 8
USGS 365624121434001 011S002E34A001M 1978-11-22 1983-08-15 11
USGS 365625121451201 011S002E33C001M 1979-08-15 1981-08-14 2
USGS 365628121443401 011S002E34D003M 1998-12-13 1998-12-13 1
USGS 365630121424001 011S002E26R002M 1971-08-19 1983-08-08 13
USGS 365643121450901 011S002E28K001M 1981-08-14 1983-08-15 3
USGS 365644121425801 011S002E26K001M 1971-08-11 1983-08-08 11
USGS 365647121455401 011S002E29J001M 1978-11-21 1980-11-11 7
USGS 365654121421801 011S002E25E004M 1971-06-10 1983-08-16 12
USGS 365702121452801 011S002E28F001M 1978-11-21 1983-08-15 10
USGS 365702121464001 011S002E29F002M 1971-08-12 1980-08-13 6
USGS 365702121494401 011S001E26C001M 1971-08-05 1971-08-05 1
USGS 365705121460601 PINTO LAKE NR FREEDOM CA 2017-06-08 2017-07-11 3
USGS 365708121434401 011S002E27A001M 1979-04-19 1983-08-16 9
USGS 365709121500401 011S001E23N001M 2013-02-05 2018-04-04 3
USGS 365714121482401 011S001E24Q002M 1978-11-21 1983-08-03 11
USGS 365715121473501 011S002E19N003M 1978-11-21 1980-11-12 7
USGS 365718121444301 UNNAMED TRIB A PAULSEN RD NR FREEDOM CA 2017-03-15 2017-07-11 27
USGS 365720121441001 011S002E27C001M 1978-11-22 1980-11-13 7
USGS 365722121441601 011S002E22P001M 2013-02-06 2013-02-06 2
USGS 365722121452701 011S002E28C002M 1978-11-21 1980-11-14 7
USGS 365729121433201 011S002E23N002M 1978-11-22 1980-11-13 7
USGS 365729121445301 011S002E21R001M 1971-08-12 1982-08-12 9
USGS 365734121434701 011S002E22R003M 1971-08-19 1971-08-19 1
USGS 365735121443401 011S002E22M001M 1978-11-22 1980-08-14 6
USGS 365741121481501 011S001E24J001M 1978-11-21 1983-08-11 12
USGS 365742121443401 011S002E22E001M 2005-09-20 2005-09-20 3
USGS 365749121481501 011S001E24H003M 1971-08-09 1981-04-21 9
USGS 365751121431401 011S002E23F001M 1981-08-10 1983-09-09 3
USGS 365759121460301 011S002E20H001M 1978-11-21 1983-08-15 11
USGS 365802121480801 011S001E24A001M 1978-11-20 1980-08-12 6
USGS 365806121433101 011S002E23D002M 1971-08-09 1971-08-09 1
USGS 365820121463901 011S002E17P001M 1978-10-10 1983-08-11 33
USGS 365820121491201 011S001E14R001M 1978-11-20 1983-08-03 11
USGS 365829121442701 011S002E15M003M 1978-11-22 1983-08-11 12
USGS 365833121445701 011S002E16J002M 1971-08-09 1971-08-09 1
USGS 365833121455501 011S002E17J001M 1978-11-21 1983-08-11 6
USGS 365851121461101 011S002E17B001M 1978-11-21 1980-11-14 7
USGS 365853121463101 011S002E17CS01M 2013-02-11 2013-02-11 2
USGS 365900121460001 011S002E08R001M 2005-08-16 2005-08-16 3
USGS 365905121491201 011S001E11R001M 1971-06-10 1971-06-10 1
USGS 365922121494501 011S001E11L001M 1980-04-16 1983-08-11 6
USGS 365923121491601 011S001E11J001M 1971-08-05 1983-08-03 11
USGS 370000121445601 011S002E04J001M 2013-02-14 2013-02-14 2
USGS 370000121480001 011S001E01B001M 2005-09-13 2008-08-19 6
USGS 370000121490001 011S001E01D001M 2005-09-12 2005-09-12 3
USGS 370017121482301 011S001E01G001M 1981-08-11 1983-08-09 5
USGS 370055121485701 010S001E36N001M 2013-01-08 2023-02-01 3
USGS 370100121490001 010S001E35K001M 2005-09-13 2005-09-13 3
USGS 370200121450001 010S002E28A001M 2011-05-03 2011-05-03 3