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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 -- 83 sites found


Hydrologic unit = 18070301
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 Orange County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 11046500 SAN JUAN C NR SAN JUAN CAPISTRANO CA 1966-11-07 1982-03-19 19
USGS 11046530 SAN JUAN C AT LA NOVIA ST BR AT SAN JUAN CAPIS CA 1988-01-18 1993-08-25 118
USGS 11046550 SAN JUAN C AT SAN JUAN CAPISTRANO CA 1971-12-27 1987-09-04 123
USGS 11047000 ARROYO TRABUCO NR SAN JUAN CAPISTRANO CA 1966-12-03 1978-09-06 76
USGS 11047300 ARROYO TRABUCO A SAN JUAN CAPISTRANO CA 1970-11-29 1993-08-25 304
USGS 333018117423301 SALT C A NIGUEL RD NR LAGUNA NIGUEL CA 2015-05-04 2016-11-03 12
USGS 333122117332801 007S007W36H001S 2004-07-14 2004-07-14 3
USGS 333147117401901 007S008W25P002S 2004-07-01 2014-04-30 5
USGS 333600117300001 006S006W28L001S 2011-10-04 2011-10-04 3
USGS 333935117394901 006S008W12Q001S 2000-10-26 2000-10-26 1
  group icon Riverside County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 332941117211501 008S005W12LS01S 1972-10-04 1972-10-04 1
USGS 332946117203801 008S004W07M001S 1972-01-11 1972-01-11 2
USGS 333016117195701 008S004W06Q001S 1967-11-20 1972-01-11 2
USGS 333300117280001 007S006W14K001S 2011-08-30 2011-08-30 3
USGS 333649117252601 006S005W29Q001S 2004-07-28 2004-07-28 3
  group icon San Diego County, California
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 11046062 COCKLEBURR C LAGOON A MOUTH NR OCEANSIDE CA 2004-11-03 2010-08-04 12
USGS 11046072 ALISO C LAGOON A MOUTH NR OCEANSIDE CA 2004-11-03 2010-08-04 12
USGS 11046082 HIDDEN C LAGOON A MOUTH NR OCEANSIDE CA 2004-11-03 2010-08-04 12
USGS 11046100 LAS FLORES C NR OCEANSIDE CA 1982-01-08 1982-04-01 7
USGS 11046102 LAS FLORES C LAGOON A MOUTH NR OCEANSIDE CA 2004-11-02 2010-08-04 12
USGS 11046250 SAN ONOFRE C A SAN ONOFRE CA 1982-01-08 1989-05-03 11
USGS 11046252 SAN ONOFRE C LAGOON A MOUTH NR SAN CLEMENTE CA 2004-11-02 2010-08-04 12
USGS 11046370 SAN MATEO C A SAN ONOFRE CA 1982-01-15 1986-09-30 14
USGS 11046372 SAN MATEO C LAGOON A MOUTH NR SAN CLEMENTE CA 1990-10-01 2010-08-04 13
USGS 331432117244901 011S005W04N001S 1951-07-17 1951-07-17 1
USGS 331610117261701 010S005W31A001S 1951-07-19 1965-11-03 24
USGS 331621117255201 010S005W29N002S 1969-04-24 1969-04-24 1
USGS 331636117254201 010S005W29L001S 1961-03-02 1969-12-10 9
USGS 331739117272901 010S006W24G002S 1951-09-05 1966-05-26 29
USGS 331744117265701 010S005W19E001S 1952-11-18 1953-10-29 3
USGS 331802117272201 010S006W13Q002S 1952-11-19 1965-11-03 25
USGS 331807117271901 010S006W13Q001S 1951-01-01 1951-07-11 2
USGS 331813117265301 010S005W18M004S 1952-01-01 1972-05-25 29
USGS 331814117265601 010S005W18M005S 2011-09-22 2011-09-22 2
USGS 331819117264001 010S005W18L001S 1951-06-07 1951-06-09 3
USGS 331819117265101 010S005W18M001S 1951-07-11 1970-01-02 9
USGS 331820117270301 010S005W18M002S 1951-08-25 1951-08-25 1
USGS 331820117270302 010S005W18M003S 1951-10-01 2011-06-08 56
USGS 331828117270201 010S005W18E002S 1956-09-11 1972-05-25 25
USGS 331829117270501 010S005W18E003S 2011-09-20 2011-09-20 6
USGS 331831117270201 010S005W18E001S 1949-03-01 1966-05-25 3
USGS 331918117231401 010S005W10K001S 1961-01-01 1961-01-01 1
USGS 332047117241601 009S005W33Q005S 1966-08-11 1969-12-10 6
USGS 332232117333501 009S007W24H001S 1951-08-02 1963-09-18 5
USGS 332247117341101 009S007W24D001S 1951-08-20 1969-12-11 34
USGS 332250117332401 009S007W24A001S 1949-01-01 1949-01-01 1
USGS 332253117335601 009S007W24C001S 1952-11-19 1963-11-12 21
USGS 332301117335501 009S007W13P001S 1951-08-16 1953-05-26 3
USGS 332302117342901 009S007W14R003S 1951-08-16 1969-12-11 35
USGS 332304117342301 009S007W14R001S 1964-07-23 1964-07-23 1
USGS 332304117342302 009S007W14R002S 1953-05-27 1965-03-16 17
USGS 332305117330601 009S006W19D002S 1958-05-15 1972-05-25 8
USGS 332306117330401 009S006W19D004S 1953-03-11 1972-05-25 23
USGS 332312117325801 009S006W19C001S 1953-01-14 1964-02-06 15
USGS 332312117331301 009S006W19D001S 1952-11-19 1971-01-28 29
USGS 332312117331302 009S006W19D005S 1971-03-03 1978-01-11 10
USGS 332313117345901 009S007W14L001S 1952-11-19 1971-01-28 34
USGS 332315117351301 009S007W14M001S 1951-08-20 1966-11-21 31
USGS 332318117323401 009S006W18Q001S 1956-04-30 1969-12-12 33
USGS 332318117323402 009S006W18Q002S 1967-09-01 1971-01-28 6
USGS 332321117345701 009S007W14F001S 1952-11-19 1965-03-16 36
USGS 332333117351501 009S007W14E002S 1968-01-01 1969-12-31 4
USGS 332334117302201 009S006W16J001S 1966-05-11 1968-11-04 5
USGS 332343117312501 009S006W17H001S 1968-05-24 1969-12-30 4
USGS 332344117343801 009S007W14B001S 1957-04-22 1968-11-13 15
USGS 332350117345301 009S007W11P004S 1951-08-14 1951-08-14 1
USGS 332353117345401 009S007W11P001S 1952-11-19 1968-11-06 23
USGS 332400117340001 009S007W11K002S 2011-06-01 2011-06-01 2
USGS 332403117344301 009S007W11K001S 1955-04-19 2007-09-12 31
USGS 332416117343401 009S007W11H002S 1952-01-01 1977-03-01 34
USGS 332422117342801 009S007W11A001S 1956-07-17 1965-11-08 3
USGS 332422117350401 009S007W11F001S 1951-08-15 1969-12-31 28
USGS 332426117343301 009S007W11H003S 1956-07-17 1972-05-25 14
USGS 332433117351301 009S007W11D004S 1965-11-12 1965-11-12 1
USGS 332438117343601 009S007W11B001S 1961-11-06 1966-05-06 2
USGS 332503117255201 009S006W06P001S 1969-07-09 1969-12-31 2
USGS 332507117341801 009S007W01E002S 1972-05-25 1972-05-25 1
USGS 332508117341701 009S007W01E001S 1949-03-01 1963-07-25 15
USGS 332511117321201 009S006W05N001S 1951-01-01 1968-11-04 7
USGS 332616117341001 008S007W36D001S 1955-04-19 1968-09-17 20
USGS 332623117340501 008S007W36C PRECIP 1999-06-15 2002-10-10 8
USGS 332723117311901 008S006W20R001S 1972-03-07 1972-03-07 1
USGS 332825117301701 008S006W21A001S 1972-03-07 1972-03-07 1