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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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 -- 489 sites found


Hydrologic unit = 02070011
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 Charles County, Maryland
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 01658000 MATTAWOMAN CREEK NEAR POMONKEY, MD 1961-01-01 2024-03-04 670
USGS 01660745 HOGHOLE RUN AT MARSHALLS CORNER, MD 1999-11-02 2000-08-08 5
USGS 0166074520 HOGHOLE RUN TRIBUTARY NEAR PORT TOBACCO, MD 1999-11-02 2000-08-08 5
USGS 0166074540 HOGHOLE RUN AT PORT TOBACCO, MD 1999-11-02 2000-08-08 5
USGS 01660800 POTOMAC RIVER NEAR MORGANTOWN, MD 1979-09-13 1984-02-17 195
USGS 01660920 ZEKIAH SWAMP RUN NEAR NEWTOWN, MD 1983-10-04 2002-06-19 39
USGS 381516076503000 POTOMAC RIVER AT COBB ISLAND 1979-09-13 1984-02-17 72
USGS 381549076502901 CH Ff 13 1961-03-09 1961-03-09 1
USGS 381614076512501 CH Ff 18 1947-01-08 1947-01-08 1
USGS 381719076522601 CH Ff 24 1961-12-13 1961-12-13 1
USGS 381803076550801 CH Fe 5 1981-01-21 2007-11-28 2
USGS 381806076545401 CH Ff 60 1984-05-01 1984-05-01 1
USGS 381812076544801 CH Ff 62 2007-11-28 2007-11-28 1
USGS 381836076534101 CH Ff 63 2001-09-26 2001-09-26 1
USGS 381900076550501 CH Fe 3 1961-12-15 1961-12-15 1
USGS 381919076533101 CH Ff 12 1950-04-10 1950-04-10 1
USGS 382016076561602 CH Ee 43 1950-04-10 1950-04-10 1
USGS 382052076545801 CH Ef 3 1961-12-13 1961-12-13 1
USGS 382103076560201 CH Ee 16 1961-12-13 1998-10-01 10
USGS 382124077122700 POTOMAC RIVER AT MARYLAND POINT 1979-08-01 1979-12-19 10
USGS 382137076562601 CH Ee 47 1961-03-09 1961-03-09 1
USGS 382142076525301 CH Ef 13 1961-12-13 1961-12-13 1
USGS 382151076580901 CH Ee 96 2006-12-12 2006-12-12 1
USGS 382153076564201 CH Ee 93 2001-09-26 2001-09-26 1
USGS 382153077113401 CH Eb 7 1961-12-13 1961-12-13 1
USGS 382233077102000 POTOMAC RIVER AT STUART WHARF 1980-01-16 1980-09-17 37
USGS 382238076585301 CH Ee 91 1984-01-12 1984-01-12 1
USGS 382240076582801 CH Ee 78 1978-06-16 1978-06-16 1
USGS 382257077145001 CH Eb 8 1961-03-09 1961-03-09 1
USGS 382359076593202 CH Ee 18 1947-01-27 1947-01-27 1
USGS 382421076571501 CH Ee 56 1961-03-09 1961-03-09 1
USGS 382434076571301 CH Ee 52 1961-12-13 1961-12-13 1
USGS 382439077094201 CH Ec 5 1950-04-06 1950-04-06 1
USGS 382456076562201 CH Ee 90 1989-06-05 2002-10-09 9
USGS 382514077115301 Nanjemoy Creek at Grayton, MD 2007-10-09 2007-10-09 1
USGS 382522077124801 Nanjemoy Creek near Grayton, MD 2007-10-09 2007-10-09 1
USGS 382541077045302 CH Dd 24 1961-12-13 1961-12-13 1
USGS 382547076581101 CH De 48 2001-09-26 2001-09-26 1
USGS 382604076543801 CH Df 9 1951-03-21 1951-03-21 1
USGS 382640077159900 POTOMAC RIVER AT DOUGLAS POINT 1979-08-02 1980-09-17 57
USGS 382709077045001 CH Dd 12 1952-04-02 1952-04-02 1
USGS 382711076592501 CH De 16 1952-04-17 1952-04-17 1
USGS 382711077004801 CH Dd 10 1951-03-07 1951-03-07 1
USGS 382712076592601 CH De 15 1950-04-10 1950-04-10 1
USGS 382713077134601 Beaverdam Creek at Nanjemoy, MD 2007-10-09 2007-10-09 1
USGS 382714077090201 Nanjemoy Creek near Ironsides, MD 2007-10-09 2008-07-29 2
USGS 382721077155201 CH Da 1 1951-03-20 1951-03-20 1
USGS 382727077122301 Hancock Run at Nanjemoy, MD 2007-10-09 2007-10-09 1
USGS 382817077013801 CH Dd 5 1947-01-22 1947-01-22 1
USGS 382818077014001 CH Dd 3 1947-01-22 1947-01-22 1
USGS 382836077112801 CH Db 7 1952-04-02 1952-04-02 1
USGS 382845076594901 CH De 47 2001-09-26 2001-09-26 1
USGS 382852076513201 CH Df 13 1961-12-13 1961-12-13 1
USGS 382857077005801 Wills Branch near Port Tobacco, MD 2007-10-30 2007-10-30 1
USGS 382900076535101 CH Df 11 1952-04-03 1952-04-03 1
USGS 382906076580501 CH De 24 1961-03-09 1961-03-09 1
USGS 383009077013401 CH Cd 57 2007-10-09 2007-10-09 1
USGS 383009077013402 CH Cd 58 2007-10-09 2007-10-09 1
USGS 383009077013404 UNNAMED TRB TO PORT TOBACCO CR NR PORT TOBACCO, MD 2007-10-09 2007-10-09 1
USGS 383022077021001 CH Cd 75 2008-06-03 2008-06-03 1
USGS 383022077021002 CH Cd 60 2007-10-09 2008-06-03 2
USGS 383023077021201 CH Cd 84 2008-06-04 2008-08-05 2
USGS 383023077021202 UNNAMED TRIB TO HOGHOLE RUN NEAR PORT TABACCO, MD 2008-06-03 2008-07-29 2
USGS 383026077014701 Hoghole Run tributary at Port Tobacco, MD 2008-06-03 2008-06-03 1
USGS 383026077014702 CH Cd 83 2008-06-03 2008-07-29 3
USGS 383026077015001 CH Cd 59 2007-10-09 2008-06-04 3
USGS 383027077013101 CH Cd 56 2007-10-09 2007-10-09 1
USGS 383027077013201 CH Cd 55 2007-10-09 2007-10-09 1
USGS 383027077013204 Port Tobacco Creek trib at Port Tobacco, MD 2007-10-09 2008-07-29 4
USGS 383037077021401 CH Cd 9 1961-03-09 1961-03-09 1
USGS 383043077014201 PT-14 2007-10-30 2007-10-30 1
USGS 383052077022701 CH Cd 48 1999-11-02 2000-08-08 5
USGS 383111076570701 CH Ce 51 1984-11-02 1984-11-02 1
USGS 383115077005001 Port Tobacco Cr. trib MD-6 nr Port Tobacco, MD 2007-10-30 2008-07-29 3
USGS 383118076433501 CH Ch 19 2002-11-25 2002-11-25 1
USGS 383133077002501 Tributary to Port Tobacco Creek near Port Tobacco 2007-10-30 2008-07-29 4
USGS 383138076593701 TRIBUTARY TO PORT TOBACCO CREEK AT LA PLATA, MD 2022-08-01 2022-08-01 1
USGS 383142076585001 CH Ce 3 1947-01-22 1947-01-22 1
USGS 383150076591101 Port Tobacco Creek tributary near La Plata, MD 2007-10-30 2007-10-30 1
USGS 383156076580901 CH Ce 36 1968-07-25 1968-07-25 1
USGS 383156077005401 PORT TOBACCO CREEK NEAR PORT TOBACCO, MD 2007-10-30 2007-10-30 1
USGS 383215076591201 CH Ce 14 1950-04-10 1950-04-10 1
USGS 383220076501201 CH Cf 9 1951-03-21 1952-04-17 2
USGS 383231077003701 CH Cd 7 1952-04-03 1952-04-03 1
USGS 383236076563901 CH Ce 37 1973-11-09 1973-11-09 1
USGS 383239076565701 CH Ce 18 1957-09-16 1959-06-17 2
USGS 383246077041101 CH Cd 10 1952-04-17 1952-04-17 1
USGS 383250076584001 CH Ce 57 1997-02-19 1997-02-19 1
USGS 383251076583901 CH Ce 56 1997-03-19 1997-03-19 1
USGS 383252076583901 CH Ce 55 1997-06-26 1997-06-26 2
USGS 383254076481401 CH Cg 24 2002-01-29 2002-01-29 1
USGS 383257076570301 CH Ce 6 1948-05-17 1960-05-12 3
USGS 383259077050202 CH Cc 5 1952-04-02 1952-04-02 1
USGS 383301077140801 CH Cb 10 1955-10-18 1955-10-18 1
USGS 383308077110301 CH Cb 40 1989-11-02 1991-08-28 2
USGS 383312077000401 CH Cd 26 1961-12-15 1961-12-15 1
USGS 383313077125401 CH Cb 11 1955-11-01 1991-08-29 12
USGS 383315077131401 CH Cb 28 1961-01-12 1991-08-29 9
USGS 383315077131901 CH Cb 26 1958-11-12 1958-11-12 1
USGS 383328077032701 CH Cd 24 1960-05-12 1960-05-12 1
USGS 383328077114201 CH Cb 38 1988-05-18 1991-08-28 6
USGS 383330077141000 POTOMAC RIVER BUOY 45/46 BWTN IH AND Q 1988-08-30 1988-11-01 2
USGS 383332077111501 CH Cb 39 1989-11-02 1991-08-29 2
USGS 383340076511601 CH Cf 33 1981-06-02 1981-06-02 1
USGS 383345076525101 UNNAMED TRIBUTARY TO PINEY BRANCH AT GARDNER, MD 2000-05-02 2000-05-02 1
USGS 383354077121501 CH Cb 9 1956-07-13 1991-08-28 13
USGS 383403076585001 Jennie Run at Lyons Corner, MD 2007-10-30 2008-07-29 3
USGS 383407077120501 CH Cb 35 1988-05-18 1991-08-28 8
USGS 383412077112802 CH Cb 18 1954-09-11 1991-08-27 12
USGS 383422077114601 CH Cb 7 1988-05-11 2002-10-21 8
USGS 383427077121001 CH Cb 34 1988-05-17 1991-08-29 8
USGS 383433076493001 CH Cg 13 1961-03-10 1961-03-10 1
USGS 383441077063901 CH Cc 34 1996-07-19 1996-07-19 1
USGS 383445076551301 CH Ce 66 2013-06-24 2013-06-24 1
USGS 383448077105201 CH Cb 16 1961-04-27 1961-04-27 1
USGS 383448077105202 CH Cb 19 1956-07-13 1991-08-27 11
USGS 383451077102601 CH Cb 29 1957-10-14 1991-08-27 9
USGS 383455076591301 Port Tobacco Creek near Lyons Corner, MD 2007-10-30 2007-10-30 1
USGS 383502076565101 CH Be 17 1961-12-15 1961-12-15 1
USGS 383503076573701 CH Be 53 2012-08-15 2022-09-07 5
USGS 383504076532801 CH Bf 113 1961-03-10 1961-03-10 1
USGS 383505077101001 CH Bb 1 1938-07-19 1956-07-13 3
USGS 383505077101002 CH Bb 2 1952-05-28 1952-05-28 1
USGS 383505077101004 CH Bb 4 1952-05-28 1952-05-28 1
USGS 383505077101005 CH Bb 5 1952-05-28 1961-04-27 5
USGS 383505077101006 CH Bb 6 1952-05-28 1991-08-27 12
USGS 383505077101007 CH Bb 7 1952-05-28 1991-08-27 12
USGS 383505077101008 CH Bb 8 1938-07-19 1961-04-27 7
USGS 383505077101009 CH Bb 9 1952-05-28 1991-08-27 11
USGS 383505077101012 CH Bb 14 1957-10-14 1961-04-27 3
USGS 383505077101013 CH Bb 15 1955-12-29 1956-01-05 2
USGS 383507077094902 CH Bc 2 1952-05-15 1957-10-14 3
USGS 383507077094903 CH Bc 3 1938-07-27 1991-08-27 13
USGS 383508076540701 CH Bf 146 1983-12-14 1983-12-21 3
USGS 383508076540702 CH Bf 147 1984-02-27 1984-02-27 1
USGS 383508076540703 CH Bf 151 1986-03-11 1986-03-11 1
USGS 383520076502501 ZEKIAH SWAMP RUN NEAR ST CHARLES, MD 2000-05-04 2000-05-04 1
USGS 383524077094401 CH Bc 5 1952-05-26 1989-10-17 7
USGS 383532077095501 CH Bc 15 1955-04-14 1955-04-14 1
USGS 383533077104002 CH Bb 19 1988-05-18 1991-08-28 7
USGS 383540077090701 CH Bc 49 1988-05-19 1991-08-28 6
USGS 383545077095501 CH Bc 23 1988-05-19 1991-08-28 8
USGS 383548077055201 CH Bc 12 1950-03-28 1950-03-28 1
USGS 383548077091101 CH Bc 72 1988-05-19 1991-08-28 6
USGS 383552077100401 CH Bb 12 1988-05-19 1989-10-20 6
USGS 383553077032401 CH Bd 52 1996-10-08 1996-10-08 1
USGS 383554077085702 CH Bc 70 1988-05-19 1991-08-28 7
USGS 383555076584501 CH Be 13 1952-04-02 1952-04-02 1
USGS 383555077074801 CH Bc 22 1956-01-31 1956-02-07 2
USGS 383556076505201 CH Bf 167 2013-11-12 2013-11-12 1
USGS 383558076524501 CH Bf 145 1981-05-13 1984-10-14 2
USGS 383606077092101 CH Bc 67 1988-05-19 1991-08-28 9
USGS 383610077081001 CH Bc 68 1988-05-19 1991-08-29 6
USGS 383633077083001 CH Bc 24 1988-05-26 1988-05-26 1
USGS 383637076545803 CH Bf 157 1986-09-08 1986-09-08 1
USGS 383645077062401 CH Bc 75 1996-11-24 1996-11-24 1
USGS 383645077062402 CH Bc 80 1996-08-29 1996-08-29 1
USGS 383649076554701 CH Be 48 1982-07-23 1984-10-17 2
USGS 383649076555201 CH Be 63 1988-02-25 1988-02-25 1
USGS 383658076465601 CH Bg 5 1952-04-17 1952-04-17 1
USGS 383706076475401 CH Bg 17 2003-03-04 2003-03-04 1
USGS 383706076575601 CH Be 57 1985-06-12 1985-06-12 1
USGS 383706076575602 CH Be 58 1985-08-28 1985-08-28 1
USGS 383706076575604 CH Be 60 1986-04-23 1986-04-23 1
USGS 383717076500501 CH Bf 164 2016-10-27 2016-10-27 3
USGS 383722076543402 CH Bf 15 1947-01-09 1947-01-09 1
USGS 383722076544001 CH Bf 128 1960-05-12 1960-05-12 1
USGS 383732076531901 CH Bf 142 1978-03-21 1978-03-21 1
USGS 383732076531902 CH Bf 158 1986-09-30 1986-09-30 1
USGS 383742077011101 CH Bd 46 1986-06-26 1986-06-26 1
USGS 383754076541003 CH Bf 130 1961-12-15 1961-12-15 1
USGS 383812077001101 CH Bd 15 1960-05-12 1960-05-12 1
USGS 383819076501302 CH Bf 141 1976-01-07 1976-01-07 1
USGS 383842076562001 CH Be 25 1961-03-10 1961-03-10 1
USGS 383846076512001 CH Bf 166 2013-09-04 2019-05-29 3
USGS 383855076562701 CH Be 41 1984-10-17 1984-10-17 1
USGS 383855076562702 CH Be 42 1984-10-17 1984-10-17 1
USGS 383901076524301 CH Bf 150 1985-07-16 1985-07-16 1
USGS 383903076594301 CH Be 72 2007-05-02 2007-05-02 1
USGS 383903076594302 CH Be 73 2013-04-04 2013-04-04 1
USGS 383904076524702 CH Bf 5 1949-09-15 1949-09-15 1
USGS 383913076510201 CH Bf 144 1984-10-15 1984-10-15 1
USGS 383920076521801 CH Bf 96 1960-05-12 1960-05-12 1
USGS 924017000000003 MD 13R 2022-10-25 2022-10-25 1
USGS 924017000000004 MD 13T 2022-10-25 2022-10-25 2
USGS 924017000000005 MD 15R 2023-03-16 2023-03-16 1
USGS 924017000000006 MD 15T 2023-03-16 2023-03-16 2
  group icon Prince George'S County, Maryland
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 383805076452001 PG Ge 12 1963-06-05 1963-06-05 1
USGS 383833076455601 PG Ge 10 1951-03-06 1951-03-06 1
USGS 383848076495801 PG Ge 18 1978-05-15 1978-05-15 1
USGS 383849076494901 PG Ge 25 2016-10-26 2016-10-26 3
USGS 383940076461502 PG Ge 13 1963-06-06 1963-06-06 1
USGS 384043076503901 PG Fd 63 1954-05-06 1957-01-24 2
USGS 384102076521501 PG Fd 16 1950-03-28 1950-03-28 1
USGS 384148076510901 PG Fd 32 1952-04-17 1952-04-17 1
USGS 384155076504301 PG Fd 34 1951-03-15 1951-03-15 1
  group icon St. Mary'S County, Maryland
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 01661000 CHAPTICO CREEK AT CHAPTICO, MD 1947-06-20 1973-09-12 211
USGS 01661050 ST CLEMENTS CREEK NEAR CLEMENTS, MD 1974-10-25 2002-09-03 124
USGS 01661475 POTOMAC RIVER AT PINEY POINT, MD 1979-09-13 1984-04-18 136
USGS 01661500 ST MARYS RIVER AT GREAT MILLS, MD 1964-05-22 1987-08-24 67
USGS 380212076195000 POTOMAC RIVER AT POINT LOOKOUT 1979-12-18 1984-04-24 45
USGS 380301076192101 SM Gh 1 1947-03-18 1947-03-18 1
USGS 380342076200501 SM Gg 14 1966-11-30 1966-11-30 1
USGS 380640076233901 SM Fg 65 2002-12-04 2002-12-04 1
USGS 380641076215701 SM Fg 48 1967-05-23 1967-05-23 1
USGS 380724076251901 SM Ff 36 1975-10-29 2001-05-15 2
USGS 380724076290001 SM Ff 8 1950-03-07 1950-03-07 1
USGS 380729076285700 POTOMAC RIVER NEAR ST. GEORGES IS. 1983-06-28 1983-08-24 125
USGS 380821076255901 SM Ff 63 1999-08-31 1999-08-31 1
USGS 380823076255501 SM Ff 65 2001-08-07 2008-07-16 2
USGS 380832076304601 SM Fe 27 1967-05-25 1967-05-25 1
USGS 380833076303301 SM Fe 41 2002-12-16 2011-05-18 5
USGS 380833076303601 SM Fe 21 1950-12-13 1950-12-13 1
USGS 380834076303402 SM Fe 31 1978-10-18 1978-10-18 1
USGS 380840076302401 SM Fe 1 1947-01-16 1947-01-16 1
USGS 380851076260701 SM Ff 34 1954-05-18 1958-06-10 3
USGS 380854076261201 SM Ff 21 1954-05-18 1958-06-10 4
USGS 380917076254001 SM Ff 35 1975-08-19 2008-07-16 3
USGS 380956076245601 SM Fg 50 1967-05-22 1967-05-22 1
USGS 381052076253001 SM Ef 80 1988-02-24 1998-10-01 8
USGS 381117076260301 SM Ef 5 1947-01-16 1947-01-16 1
USGS 381125076303901 SM Ee 35 1967-05-23 1967-05-23 1
USGS 381126076304201 SM Ee 34 1967-05-18 1967-05-18 1
USGS 381206076341301 SM Ee 39 1967-05-25 1967-05-25 1
USGS 381300076273701 SM Ef 17 1967-05-25 1967-05-25 1
USGS 381325076271401 SM Ef 53 1967-05-23 1967-05-23 1
USGS 381327076265603 SM Ef 86 2012-08-14 2012-08-14 4
USGS 381332076452201 SM Eb 19 1967-05-18 1967-05-18 1
USGS 381422076303401 SM Ee 38 1967-05-23 1967-05-23 1
USGS 381435076291802 SM Ef 57 1966-11-30 1966-11-30 1
USGS 381436076334401 SM Ee 4 1950-03-28 1950-03-28 1
USGS 381439076405601 SM Ec 15 1967-05-18 1967-05-18 1
USGS 381440076271701 SM Ef 94 2010-03-11 2010-03-11 1
USGS 381451076292901 SM Ef 96 2012-07-31 2022-09-08 7
USGS 381454076403201 SM Ec 10 1950-03-05 1950-03-05 1
USGS 381527076283101 SM Df 71 1979-07-13 1979-07-13 1
USGS 381541076330301 UNNAMED TRIB TO ST MARY'S LAKE NEAR CALLAWAY, MD 2000-05-03 2000-05-03 1
USGS 381548076272101 SM Df 22 1966-06-10 1966-06-10 1
USGS 381548076272102 SM Df 84 1983-01-05 1983-01-05 1
USGS 381552076265001 SM Df 1 1951-10-29 1962-06-24 7
USGS 381558076442801 SM Dc 17 1952-04-02 1952-04-02 1
USGS 381615076270201 SM Df 3 1951-10-29 1962-06-24 7
USGS 381615076364701 SM Dd 63 1980-07-09 1980-07-09 1
USGS 381616076364701 SM Dd 46 1978-10-20 1978-10-20 1
USGS 381616076364703 SM Dd 62 1980-07-01 1980-07-01 1
USGS 381626076393401 SM Dd 72 2001-05-15 2001-05-15 1
USGS 381635076274201 SM Df 6 1951-11-27 1958-06-09 5
USGS 381637076293001 SM Df 53 1967-05-19 1967-05-19 1
USGS 381716076462501 SM Db 24 1950-03-28 1950-03-28 1
USGS 381722076325601 SM De 33 1967-05-22 1967-05-22 1
USGS 381723076375401 SM Dd 30 1967-08-02 1967-08-02 1
USGS 381723076375801 SM Dd 5 1949-03-09 1949-03-09 1
USGS 381745076381201 SM Dd 1 1949-03-09 1949-03-09 1
USGS 381753076310001 SM De 52 2010-03-11 2010-03-11 1
USGS 381800076331101 SM De 60 2010-03-11 2010-03-11 1
USGS 381800076444501 SM Dc 63 2002-12-03 2002-12-03 1
USGS 381807076380001 SM Dd 50 1978-10-26 1978-10-26 1
USGS 381812076473601 SM Db 29 1967-05-17 1967-05-17 1
USGS 381817076392801 SM Dd 12 1950-03-28 1950-03-28 1
USGS 381827076350402 SM Dd 78 2010-03-11 2010-03-11 1
USGS 381833076314901 SM De 32 1967-05-19 1967-05-19 1
USGS 381835076381501 SM Dd 65 1986-07-24 1986-07-24 1
USGS 381848076421901 ST CLEMENTS BAY TRIBUTARY NEAR CLEMENTS, MD 2000-05-03 2000-05-03 1
USGS 381908076331702 SM De 40 1977-09-19 1977-09-19 1
USGS 381909076411401 SM Dc 49 1967-05-18 1967-05-18 1
USGS 381914076331002 SM De 59 2010-03-10 2010-03-10 1
USGS 381921076372601 SM Dd 70 2001-08-24 2002-12-16 2
USGS 381930076431501 SM Dc 12 1950-03-28 1950-03-28 1
USGS 382010076501101 SM Ca 7 1980-08-05 1980-08-05 1
USGS 382015076332501 SM Ce 14 1950-03-28 1950-03-28 1
USGS 382018076333401 SM Ce 20 1967-05-19 1967-05-19 1
USGS 382023076463301 SM Cb 9 1952-04-02 1952-04-02 1
USGS 382121076350301 SM Cd 48 2011-06-14 2011-06-14 4
USGS 382200076470101 SM Cb 1 1947-01-17 1947-01-17 1
USGS 382250076430101 SM Cc 11 1967-05-16 1967-05-16 1
USGS 382259076502601 SM Ca 3 1967-05-17 1967-05-17 1
USGS 382309076432001 SM Cc 6 1950-03-28 1950-03-28 1
USGS 382426076464302 SM Cb 19 1980-08-05 1980-08-05 1
USGS 382600076484101 SM Bb 10 1952-04-17 1952-04-17 1
USGS 382621076445301 SM Bc 41 2010-03-10 2010-03-10 1
USGS 382656076451201 SM Bb 13 1967-05-16 1967-05-16 1
USGS 382821076463501 SM Bb 1 1947-01-17 1947-01-17 1
USGS 382838076470101 SM Bb 15 1979-07-19 1979-07-19 1
USGS 382838076470102 SM Bb 22 1980-07-01 1980-07-01 1
USGS 382841076464401 SM Bb 27 1985-07-25 1985-07-25 1
  group icon Wicomico County, Maryland
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 381650075491801 WI Dc 32 1983-01-05 1983-01-05 1
  group icon King George County, Virginia
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 01660802 GAMBO CREEK AT BLANDY BOULEVARD NR DAHLGREN, VA 1993-05-17 1993-05-17 1
USGS 01660804 GAMBO CREEK AT BAGBY ROAD AT DAHLGREN, VA 1993-05-17 1993-05-17 1
USGS 01660806 GAMBO CREEK AT TISDALE ROAD AT DAHLGREN, VA 1993-05-17 1993-05-17 1
USGS 01660809 MACHODOC CREEK AB WOOD ISLAND NEAR DAHLGREN, VA 1994-07-20 1994-07-20 1
USGS 01660811 UPPER MACHODAC CR AB BABER POINT AT DAHLGREN, VA 1994-07-20 1994-07-20 1
USGS 01660812 BLACK MARSH NEAR MOUTH NEAR DAHLGREN, VA 1994-07-20 1994-07-20 1
USGS 381536077095201 53Q 21 1998-06-23 1998-06-23 1
USGS 381725077024501 54Q 73 1994-06-24 1994-06-24 1
USGS 381729077021001 54Q 75 1994-06-28 1994-06-28 1
USGS 381732077021201 54Q 74 1994-06-28 1994-06-28 1
USGS 381734077014501 54Q 76 1994-06-15 1994-06-15 1
USGS 381736077013801 54Q 77 1994-06-15 1994-06-15 1
USGS 381737077024601 54Q 55 1994-06-22 1994-06-22 1
USGS 381737077024602 54Q 56 1994-06-22 1994-06-22 1
USGS 381746077020001 54Q 57 1994-06-27 1994-06-27 1
USGS 381746077020002 54Q 58 1994-06-27 1994-06-27 1
USGS 381758077023001 54Q 63 1994-06-30 1994-06-30 1
USGS 381758077023002 54Q 64 1994-06-29 1994-06-29 1
USGS 381759077011401 54Q 59 1994-06-14 1994-06-14 1
USGS 381759077011402 54Q 60 1994-06-14 1994-06-14 1
USGS 381759077025701 54Q 72 1994-06-20 1994-06-20 1
USGS 381812077015201 54Q 78 1994-06-16 1994-06-16 1
USGS 381814077030301 54Q 61 1994-07-05 1994-07-05 1
USGS 381814077030302 54Q 62 1994-07-05 1994-07-05 1
USGS 381817077023101 54Q 80 1994-06-21 1994-06-21 1
USGS 381820077024501 54Q 81 1994-06-21 1994-06-21 1
USGS 381825077021101 54Q 79 1994-06-16 1994-06-16 1
USGS 381829077040101 54Q 67 1994-06-30 1994-06-30 1
USGS 381829077040102 54Q 68 1994-06-30 1994-06-30 1
USGS 381830077024501 54Q 82 1994-06-24 1994-06-24 1
USGS 381830077031801 54Q 71 1994-06-20 1994-06-20 1
USGS 381835077015601 54Q 65 1994-06-17 1994-06-17 1
USGS 381835077015602 54Q 66 1994-06-17 1994-06-17 1
USGS 381857077032701 54Q 69 1994-06-23 1994-06-23 1
USGS 381857077032702 54Q 70 1994-06-23 1994-06-23 1
USGS 381915077020301 54Q 23 1993-05-27 1993-05-27 1
USGS 381915077020302 54Q 24 1993-05-26 1993-05-26 1
USGS 381915077020303 54Q 48 1993-05-25 1993-05-25 1
USGS 381926077021701 54Q 50 1993-05-25 1993-05-25 1
USGS 381926077023201 54Q 49 1993-05-25 1993-05-25 1
USGS 381937077024801 54Q 51 1993-05-24 1993-05-24 1
USGS 381946077014201 54Q 46 1993-05-21 1993-05-21 1
USGS 381946077015901 54Q 44 1993-05-20 1993-05-20 1
USGS 381949077013101 54Q 45 1993-05-21 1993-05-21 1
USGS 381954077024901 54Q 52 1993-05-24 1993-05-24 1
USGS 382004077015701 54Q 43 1993-05-21 1993-05-21 1
USGS 382010077020001 54Q 47 1993-05-19 1993-05-19 1
USGS 382014077020101 54Q 42 1993-05-20 1993-05-20 1
USGS 382017077030401 54Q 25 1993-05-25 1993-05-25 1
USGS 382027077020201 54Q 41 1993-05-20 1993-05-20 1
USGS 382031077030101 54Q 26 1993-05-25 1993-05-25 1
USGS 382042077011901 54Q 37 1993-05-24 1993-05-24 1
USGS 382042077022401 54Q 40 1993-05-20 1993-05-20 1
USGS 382046077035501 54Q 91 1998-06-25 1998-06-25 1
USGS 382048077015201 54Q 38 1993-05-17 1993-06-29 2
USGS 382054077024201 54Q 39 1993-05-21 1993-05-21 1
USGS 382055077011301 54Q 36 1993-05-17 1993-05-17 1
USGS 382055077025901 54Q 27 1993-05-24 1993-05-24 1
USGS 382103077025401 54Q 19 1993-05-27 1993-05-27 1
USGS 382103077025402 54Q 20 1993-05-26 1993-05-26 1
USGS 382103077025403 54Q 28 1993-05-21 1993-05-21 1
USGS 382112077024401 54Q 29 1993-05-19 1993-05-19 1
USGS 382113077024101 54Q 53 1993-05-19 1993-05-19 1
USGS 382116077023501 54Q 30 1993-05-19 1993-05-19 1
USGS 382123077020501 54Q 31 1993-05-18 1993-05-18 1
USGS 382127077013301 54Q 32 1993-05-18 1993-05-18 1
USGS 382129077005801 54Q 21 1993-05-27 1993-05-27 1
USGS 382129077005802 54Q 22 1993-05-26 1993-05-26 1
USGS 382129077005803 54Q 34 1993-05-18 1993-05-18 1
USGS 382130077010801 54Q 33 1993-05-24 1993-05-24 1
USGS 382131077005501 54Q 35 1993-05-18 1993-05-18 1
USGS 382243077034601 54R 3 1975-03-04 1975-03-04 1
USGS 382341077032401 54R 2 1980-02-11 1980-02-11 1
  group icon Northumberland County, Virginia
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 0166153510 UNNAMED TRIB TO MILL CREEK NEAR LOTTSBURG, VA 2000-05-09 2000-05-09 1
USGS 375716076255401 59M 6 1998-09-10 1998-09-10 1
USGS 375729076245001 59M 4 1948-06-08 1953-05-15 2
USGS 375743076311401 58M 3 1979-12-05 1979-12-05 1
USGS 375744076335001 58M 4 1998-07-07 1998-07-07 1
USGS 375755076252001 59M 1 1918-07-02 1918-07-02 1
USGS 375806076333201 58M 1 1946-03-01 1979-12-05 4
USGS 375946076275001 59M 2 1918-07-05 1979-12-05 3
USGS 375947076275301 59M 3 1918-07-05 1918-07-05 1
USGS 380008076274801 59N 1 1975-10-09 1975-10-09 1
USGS 380103076315901 58N 5 2013-09-18 2013-09-18 3
  group icon Prince William County, Virginia
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 01658425 QUANTICO CR TRIB NO 3 NR INDEPENDENT HILL, VA 1983-03-30 1983-03-30 1
USGS 01658430 QUANTICO CR AT TRAIL NR INDEPENDENT HILL, VA 1983-03-30 1983-03-30 1
USGS 01658450 QUANTICO CR AT BURMA RD NR INDEPENDENT HILL, VA 1973-03-28 1984-03-29 23
USGS 01658460 QUANTICO CREEK BELOW CAMP 4 NEAR DUMFRIES, VA 1983-03-17 1983-11-17 14
USGS 01658475 QUANTICO CREEK AB PYRITE MINE NR DUMFRIES, VA 1974-11-08 1983-10-26 15
USGS 01658480 QUANTICO CREEK NEAR DUMFRIES, VA 1973-03-28 1985-06-26 41
USGS 01658500 S F QUANTICO CREEK NEAR INDEPENDENT HILL, VA 1951-08-01 2024-03-07 7351
USGS 01658510 S F QUANTICO CR TRIB 7 NR INDEPENDENT HILL, VA 1983-04-19 1983-05-25 2
USGS 01658530 S F QUANTICO CREEK AT MAWAVI RD NEAR JOPLIN, VA 1983-08-23 1985-06-25 32
USGS 01658540 S F QUANTICO CR TRIB NO 8 AT MOUTH NR JOPLIN, VA 1983-04-19 1983-10-18 7
USGS 01658550 S F QUANTICO CREEK AT CAMP 5, NEAR JOPLIN, VA 1983-04-19 1985-06-25 36
USGS 01658601 S F QUANTICO CR TRIB 1 AT TRAIL 10 NR JOPLIN, VA 1983-04-19 1984-03-20 11
USGS 01658602 S F QUANTICO CREEK TRIB 1 AT MOUTH NR JOPLIN, VA 1983-11-16 1985-03-27 5
USGS 01658603 S F QUANTICO CREEK BELOW TRIB 1 NEAR JOPLIN, VA 1983-04-19 1985-06-25 37
USGS 01658605 S F QUANTICO CR TRIB NO 2 AT MOUTH NR JOPLIN, VA 1985-02-02 1985-03-27 4
USGS 01658608 S F QUANTICO CR TRIB NO 4 AT MOUTH NR JOPLIN, VA 1983-11-15 1985-03-26 6
USGS 01658610 S F QUANTICO CREEK AT PARK RD NEAR JOPLIN, VA 1983-04-19 1985-06-25 40
USGS 01658612 S F QUANTICO CR TRIB NO 3 AT MOUTH NR JOPLIN, VA 1983-11-15 1985-03-26 4
USGS 01658615 MARY BIRD BRANCH AT TAYLOR FARM RD NR JOPLIN, VA 1983-03-30 1983-12-14 8
USGS 01658618 MARY BIRD BRANCH AT MOUTH NEAR DUMFRIES, VA 1985-02-01 1985-03-26 3
USGS 01658625 S F QUANTICO CREEK TRIB NO 5 NEAR DUMFRIES, VA 1983-04-19 1985-06-25 33
USGS 01658630 S F QUANTICO CREEK AT ORENDA RD NR DUMFRIES, VA 1985-02-01 1985-02-13 2
USGS 01658635 S F QUANTICO CR TRIB 6 AT MOUTH NR DUMFRIES, VA 1985-03-26 1985-03-26 1
USGS 01658650 S F QUANTICO CREEK NEAR DUMFRIES, VA 1973-03-28 1985-06-26 42
USGS 01658651 S F QUANTICO CREEK TRIB NO 7 NEAR DUMFRIES, VA 1983-03-29 1983-03-29 1
USGS 01658653 QUANTICO CR TRIB 1 AT PRIV RD NR DUMFRIES, VA 1985-02-01 1985-03-28 3
USGS 01658698 LITTLE CREEK AT MOCKING BIRD RD AT TRIANGLE, VA 1999-04-08 2001-06-11 36
USGS 01658705 LITTLE CREEK AT GEIGER ROAD AT QUANTICO, VA 1999-04-08 2001-06-11 37
USGS 01658710 POTOMAC RIVER AT QUANTICO, VA 1979-08-02 1983-08-31 160
USGS 01659000 N BRANCH CHOPAWAMSIC CR NR INDEPENDENT HILL, VA 1951-08-01 2011-09-28 2584
USGS 01660110 CHOPAWAMSIC CREEK AT I-95 NEAR JOPLIN, VA 1996-02-07 2001-12-12 75
USGS 383023077183201 52S 44 1991-08-12 1991-08-12 1
USGS 383330077204801 52S 30 1975-04-09 1991-08-19 2
USGS 383332077155401 52S 51 1991-08-15 1991-08-15 1
USGS 383337077155301 52S 52 1991-08-21 1991-08-21 1
USGS 383343077220601 52S 3 1968-07-26 1968-07-26 1
USGS 383359077164201 52S 47 1991-08-15 1991-08-15 1
USGS 383431077210101 PRINCE WILLIAM FOREST PARK PYRITE MINE 1983-05-25 1983-05-25 1
USGS 383436077212901 PRW371 2006-07-18 2006-07-18 1
USGS 383436077214001 PRW370 2006-07-18 2006-07-18 1
USGS 383441077250601 51S 2 1968-06-25 1968-06-25 2
USGS 383442077252601 PRW101 2006-07-19 2006-07-19 1
USGS 383456077224901 PRW247 2006-07-10 2006-07-10 1
USGS 383458077250801 PRW114 2006-07-18 2006-07-18 1
USGS 383505077242801 PRW424 2006-07-18 2006-07-18 1
USGS 383506077225101 51S 9 1975-08-27 1975-08-27 1
USGS 383512077243601 PRW127 2006-07-18 2006-07-18 1
USGS 383514077242601 51S 13 2003-07-15 2011-08-17 9
USGS 383521077221001 PRW262 2006-07-10 2006-07-10 1
USGS 383528077221001 PRW263 2006-07-19 2006-07-19 1
USGS 383534077210601 PRW331 2006-07-19 2006-07-19 1
USGS 383542077240001 PRW227 2006-07-11 2006-07-11 1
USGS 383543077241601 PRW226 2006-07-11 2006-07-11 1
USGS 383551077221601 52S 29 1975-09-11 1975-09-11 1
USGS 383614077212401 PRW301 2006-07-19 2006-07-19 1
USGS 383624077213101 52S 1 1968-07-26 1968-07-26 1
USGS 383635077243901 PRW157 2006-07-19 2006-07-19 1
USGS 383638077221201 PRW315 2006-07-11 2006-07-11 1
USGS 383639077222201 PRW314 2006-07-11 2006-07-11 1
USGS 383644077220301 VA-ForestParksHS-2 2015-07-22 2015-07-22 1
USGS 383653077203701 51S 18 2003-08-12 2015-07-16 2
USGS 383655077251301 PRW146 2006-07-10 2006-07-10 1
USGS 383657077255101 PRW516 2006-07-10 2006-07-10 1
USGS 383659077215501 51S 16 2003-07-16 2015-07-22 2
USGS 383706077210801 51S 17 2003-07-17 2015-08-26 2
USGS 383710077222301 51S 15 2003-07-16 2003-07-16 3
USGS 383712077253401 PRW172 2006-07-10 2006-07-10 1
USGS 383750077231201 51S 14 2003-07-14 2015-08-26 2
  group icon Stafford County, Virginia
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 01659500 M BRANCH CHOPAWAMSIC CREEK NR GARRISONVILLE, VA 2008-11-19 2009-08-26 5
USGS 01659700 BRECKENRIDGE RES AB SB CHOP CR NR JOPLIN, VA 2008-09-24 2009-08-25 14
USGS 01660000 S BRANCH CHOPAWAMSIC CREEK NR GARRISONVILLE, VA 2008-11-19 2009-08-26 5
USGS 01660020 BRECKENRIDGE RES BL SB CHOP CR NR JOPLIN, VA 2008-09-24 2009-08-25 14
USGS 01660030 BRECKENRIDGE RESERVOIR ABOVE DAM NEAR JOPLIN, VA 2008-09-24 2009-08-25 14
USGS 01660350 AQUIA CREEK AT ROUTE 610 NEAR GARRISONVILLE, VA 1994-08-23 1994-08-23 1
USGS 01660360 CANNON CREEK NR COUNTYLINE NR SOMERVILLE, VA 1995-08-01 1995-08-01 1
USGS 01660365 CANNON CREEK NR R6 POND NR SOMERVILLE, VA 1995-08-01 1995-08-01 1
USGS 01660370 CANNON CREEK TRIB NR GARRISONVILLE ESTATES, VA 1995-07-31 1995-07-31 1
USGS 01660375 CANNON CR BL RT 644 NR GARRISONVILLE ESTATES, VA 1995-07-31 1995-07-31 1
USGS 01660380 CANNON CREEK NEAR GARRISONVILLE, VA 1994-09-27 1996-12-16 464
USGS 01660385 AQUIA CREEK AT RT 643 NR GARRISONVILLE ESTATES, VA 1994-09-27 1995-08-02 5
USGS 01660400 AQUIA CREEK NEAR GARRISONVILLE, VA 1995-08-02 2008-07-09 11
USGS 01660440 UPPER NORTH BRANCH LUNGA RES NR GARRISONVILLE, VA 2004-09-14 2005-08-12 13
USGS 01660450 LOWER NORTH BRANCH LUNGA RES NR GARRISONVILLE, VA 2004-09-14 2005-08-12 13
USGS 01660470 UPPER SOUTH BRANCH LUNGA RES NR GARRISONVILLE, VA 2004-09-14 2005-08-12 13
USGS 01660480 LOWER SOUTH BRANCH LUNGA RES NR GARRISONVILLE, VA 2004-09-15 2005-08-12 11
USGS 01660489 LUNGA RES AT WATER INTAKE NEAR GARRISONVILLE, VA 2004-09-15 2005-08-12 11
USGS 01660490 LUNGA RESERVOIR AT SPILLWAY NEAR GARRISONVILLE, VA 2004-09-15 2005-08-12 13
USGS 01660500 BEAVERDAM RUN NEAR GARRISONVILLE, VA 1951-08-01 2000-12-19 1261
USGS 382533077191901 52R 4 1974-10-07 1974-10-07 1
USGS 382706077285801 51R 6 1994-08-31 2014-11-18 6
USGS 382805077255801 51R 7 2003-07-15 2015-07-15 4
USGS 951179000000001 VA 3R 2023-03-16 2023-03-16 1
USGS 951179000000002 VA 3T 2023-03-16 2023-03-16 2
  group icon Westmoreland County, Virginia
Agency Site Number Site Name Period of Record
Begin Date End Date Samples
USGS 01660860 BRIDGES CREEK AT MOUTH NEAR WAKEFIELD, VA 1998-12-15 1999-06-15 3
USGS 01660870 FOX HALL SWAMP NEAR POTOMAC MILLS, VA 1991-07-26 1991-07-26 1
USGS 0166087510 CANAL SWAMP AT BAYNESVILLE, VA 2000-05-15 2000-05-15 1
USGS 0166087750 POPES CREEK AT POINT OF PT NEAR WAKEFIELD, VA 1998-10-07 1999-06-14 4
USGS 0166087760 POPES CREEK AT BURNT HOUSE PT NEAR WAKEFIELD, VA 1998-10-07 1999-06-14 4
USGS 0166087770 DANCING MARSH NEAR WAKEFIELD, VA 1998-10-06 1999-06-15 4
USGS 0166111050 POOR JACK CREEK NEAR MONTROSS, VA 2000-05-15 2000-05-15 1
USGS 0166117050 MARSHAL CREEK NEAR WARSAW, VA 2000-05-09 2000-05-09 1
USGS 380147076351201 58N 2 1946-05-01 2013-09-17 6
USGS 380553076440501 57N 2 1946-08-16 1953-05-20 3
USGS 380928077001301 54P 1 1944-10-12 1944-10-12 1
USGS 380945076520601 56P 1 1975-04-24 2016-06-07 2
USGS 380953076523701 55P 2 1974-10-07 1974-10-07 1
USGS 381022076524301 55P 18 2016-06-07 2016-06-07 1
USGS 381108076551101 55PS 1 1998-10-06 1999-06-15 3
USGS 381110076550201 55P 6 1933-10-12 1933-10-12 1
USGS 381110076550401 55P 4 1974-06-07 1974-09-26 2
USGS 381122076553101 55P 3 1974-07-24 1979-12-05 4
USGS 381148076550801 55P 1 1974-10-07 1974-10-07 1
USGS 381158076575301 55P 11 1998-09-10 1998-09-10 1
USGS 381359076574001 55P 8 1977-01-28 1977-01-28 1
USGS 381430076574901 55P 7 1975-12-18 1975-12-18 1
USGS 381506076575901 55Q 4 1975-12-18 1975-12-18 1
USGS 381530076584401 55Q 2 1980-02-11 1980-02-11 1
USGS 381531076583001 55Q 6 2013-09-30 2022-02-23 4
USGS 381617076591401 55Q 5 1977-01-28 1977-01-28 1