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Water Science for Maryland, Delaware and the District of Columbia

Home >> Water Data >> Groundwater >> Water-Table Wells >> DC Metro Groundwater Wells

Conditions as of June 30, 2007

LOCAL NUMBER	WELL DEPTH	AQUIFER	PERIOD OF RECORD
49U 1	345 ft	Waterfall Formation of Early Jurassic age	from October, 1968
49V 1	165 ft	Turkey Run Formation of Early Jurassic age	from November, 1968
49Y 1 SOW 022	516 ft	Bedrock of Precambrian or Cambrian age	from September, 1969
50W 4C	535 ft	Slightly metamorphosed Balls Bluff Formation of Late Triassic age	from October, 1977
51S 7	490 ft	Lunga Reservoir Formation of Cambrian age	from September 1973 to November 1975, December 1977 to current year
52V 2D	205 ft	Manassas Sandstone of Triassic age	from October, 1976
54V 3	50 ft	Terrace gravels of Holocene age and sand of Early Cretaceous age	from January, 1958
FR Af 27	365 ft	Gettysburg Shale of Upper Triassic age	from April, 1982
FR Bd 96	189 ft	Catoctin Metabasalt of Precambrian age	from April, 1982
FR Cg 1	42.5 ft	Ijamsville Formation of Paleozoic age	from July, 1946
FR Df 35	302 ft	Sams Creek Metabasalt of Paleozoic age	from May, 1982
MO Cb 26	885 ft	Manassas Sandstone, Poolesville Member of Upper Triassic age	from February, 1991
MO Cc 14	46 ft	Ijamsville Formation of Paleozoic age	from November, 1952
MO Ec 10	855 ft	Balls Bluff Siltstone of Upper Triassic age	from September 1990
MO Eh 20	102.9 ft	Loch Raven Formation of Cambrian Age	from March, 1955
PG Bc 16	27.4 ft	Patuxent Formation of Lower Cretaceous age	from September, 1962

49U1

WELL NUMBER	49U1
SITE ID	384931077420301
LOCATION	Lat 38°49´30", long 77°42´08", Hydrologic Unit 02070010, 500 ft. north of State Highway 55, 0.8 mi. east of Thoroughfare Gap
AQUIFER	Waterfall Formation of Early Jurassic age
INSTRUMENTATION	Occasional measurement with chalked tape by USGS personnel. Prior to February 1980, continuous strip-chart recorder
CHARACTERISTICS	Drilled observation water well, diameter 7 in., depth 345 ft., cased to 20 ft., open hole 20 to 345 ft.
DATUM	Elevation of land-surface datum is 383 ft. above sea level, from topographic map. Measuring point: Top of casing, 2.0 ft. above land-surface datum
REMARKS
PERIOD OF RECORD	October 1968 to current year
EXTREMES FOR RECORD	Highest water level recorded, 2.59 ft. below land-surface datum, March 19, 1975; lowest measured, 10.33 ft. below land-surface datum, Oct. 14, 1988
COOPERATORS	Virginia Department of Environmental Quality - Water Division
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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49V1

WELL NUMBER	49V 1
SITE ID	385607077381101
LOCATION	Lat 38°56´07", long 77°38´11", Hydrologic Unit 02070010, near intersection of State Highways 600 and 615, 2.8 miles south of Aldie
AQUIFER	Turkey Run Formation of Early Jurassic age
INSTRUMENTATION	Occasional measurement with chalked tape by USGS personnel. June 19, 1979 to Oct. 1, 1995, digital recorder 60-minute punch.
CHARACTERISTICS	Drilled observation water well, diameter 7 in., depth 165 ft., cased to 10 ft., open hole 10 to 165 ft.
DATUM	Elevation of land-surface datum is 420 ft. above sea level, from topographic map. Measuring point: Top of casing, 1.0 ft. above land-surface datum
REMARKS
PERIOD OF RECORD	November 1968 to current year
EXTREMES FOR RECORD	Highest water level recorded, 6.85 ft. below land-surface datum, October 12, 1979; lowest measured, 13.09 ft. below land-surface datum, Sep. 16, 1991
COOPERATORS	Virginia Department of Environmental Quality - Water Division
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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49Y 1 SOW 022

WELL NUMBER	49Y 1 SOW 022
SITE ID	391542077423801
LOCATION	Lat 39°15´42", long 77°42´38", Hydrologic Unit 02070008, 4.2 miles southeast of Harpers Ferry.
AQUIFER	Bedrock of Precambrian or Cambrian age
INSTRUMENTATION	Occasional measurement with chalked tape by Virginia Department of Environmental Quality - Water Division personnel. October 1, 1985 to Oct. 1, 1996, bimonthly measuremment with chalked tape.
CHARACTERISTICS	Drilled unused water well, diameter 6.5 in., depth 516 ft., cased to 45 ft., open hole 45 to 516 ft.
DATUM	Elevation of land-surface datum is 1100 ft. above sea level, from topographic map. Measuring point: Top of casing, at land-surface datum
REMARKS	Records provided by the Virginia Department of Environmental Quality - Water Division
PERIOD OF RECORD	September 1969 to current year
EXTREMES FOR RECORD	Highest water level recorded, 48 ft. below land-surface datum, June 22, 1972; lowest measured, 61.80 ft. below land-surface datum, Dec. 2, 1992
COOPERATORS	Virginia Department of Environmental Quality - Water Division
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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50W 4C

WELL NUMBER	50W 4C
SITE ID	390623077314201
LOCATION	Lat 39°06´23", long 77°31´42", Hydrologic Unit 02070008, under water tower 500 ft. east of State Highway 7, 0.75 mi. east of Leesburg
AQUIFER	Slightly metamorphosed Balls Bluff Formation of the Late Triassic age
INSTRUMENTATION	Monthly measurement with chalked tape by USGS personnel
CHARACTERISTICS	Drilled unused water well, diameter 6 in., depth 535 ft., cased to 6 ft., open hole 6 to 535 ft.
DATUM	Elevation of land-surface datum is 400 ft. above sea level, from topographic map. Measuring point: Top of casing, 2.0 ft. above land-surface datum
REMARKS
PERIOD OF RECORD	October 1977 to current year
EXTREMES FOR RECORD	Highest water level recorded, 28.13 ft. below land-surface datum, April 3, 1997; lowest measured, 49.06 ft. below land-surface datum, Nov. 27, 1985
COOPERATORS	Virginia Department of Environmental Quality - Water Division
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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51S 7

WELL NUMBER	51S 7
SITE ID	383423077245901
LOCATION	Lat 38°34´23", long 77°24´59", Hydrologic Unit 02070011, in Prince William Forest Park
AQUIFER	Lunga Reservoir Formation of Cambrian age
INSTRUMENTATION	Occasional measurement with chalked tape by USGS personnel
CHARACTERISTICS	Drilled observation water well, diameter 6 in., depth 490 ft., cased to 50 ft., open hole 50 to 490 ft.
DATUM	Elevation of land-surface datum is 295 ft. above sea level, from topographic map. Measuring point: Top of casing, 2.0 ft. above land-surface datum
REMARKS
PERIOD OF RECORD	September 1973 to November 1975, December 1977 to current year. Unpublished records available prior to December 1977 in files of the Geological Survey
EXTREMES FOR RECORD	Highest water level recorded, 1.00 ft. above land-surface datum, March 29, 1994; lowest measured, 12.95 ft. below land-surface datum, Nov. 16,17, 1988
COOPERATORS	Virginia Department of Environmental Quality - Water Division
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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52V 2D

WELL NUMBER	52V 2D
SITE ID	385638077220101
LOCATION	Lat 38°56´58", long 77°22´01", Hydrologic Unit 02070008, at USGS National Center in Reston
AQUIFER	Manassas Sandstone of Triassic age
INSTRUMENTATION	Satellite data collection platform 15-minute record interval
CHARACTERISTICS	Drilled observation water well, diameter 8 in., depth 205 ft., cased to 35 ft., open hole 35 to 205 ft.
DATUM	Elevation of land-surface datum is 390 ft. above sea level, from topographic map. Measuring point: Top of casing, 2.0 ft. above land-surface datum
REMARKS
PERIOD OF RECORD	October 1976 to current year
EXTREMES FOR RECORD	Highest water level recorded, 6.47 ft. below land-surface datum, March 30, 1984; lowest measured, 24.92 ft. below land-surface datum, Dec. 7-8, 1998
COOPERATORS
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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54V 3

WELL NUMBER	54V 3
SITE ID	385253077042301
LOCATION	Lat 38°52´53", long 77°04´23", Hydrologic Unit 02070010, at Arlington National Cemetery in Arlington , VA
AQUIFER	Terrace gravels of Holocene age and sand of Early Cretaceous age
INSTRUMENTATION	Occasional measurement with chalked tape by USGS personnel
CHARACTERISTICS	Dug unused water well, diameter 48 in., depth 50 ft.
DATUM	Elevation of land-surface datum is 205 ft. above sea level, from topographic map. Measuring point: Top of brick and stone casing, 3.0 ft. above land-surface datum
REMARKS
PERIOD OF RECORD	January 1958 to current year
EXTREMES FOR RECORD	Highest water level recorded, 40.34 ft. below land-surface datum,June 26, 1978; lowest measured, 45.28 ft. below land-surface datum, Nov. 28, 1988
COOPERATORS	Virginia Department of Environmental Quality - Water Division
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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FR Af 27

WELL NUMBER	FR Af 27
SITE ID	394200077190701
LOCATION	Lat 39°42'00", long 77°19'07", Hydrologic Unit 02070009, 0.3 mi southwest of U.S. Rt. 15 and MD Rt. 140, Emmitsburg
AQUIFER	Gettysburg Shale of Upper Triassic age.
INSTRUMENTATION	Monthly measurements with chalked steel tape by U.S. Geological Survey personnel
CHARACTERISTICS	Drilled, observation, artesian well, depth 365 ft; casing diameter 6 in., to 41 ft; open hole
DATUM	Elevation of land surface is 385 ft above sea level, from topographic map. Measuring point: Top of casing, 0.81 ft above land surface
REMARKS	Maryland Water-Level Network observation well
PERIOD OF RECORD	April 1982 to current year
EXTREMES FOR RECORD	Highest water level measured, 0.69 ft above land surface, July 31, 1996; lowest measured, 5.90 ft below land surface, July 16, 1999, and Aug. 12, 1999
COOPERATORS	Maryland Geological Survey
Download the data for the entire period of record for this well NOTE: October 2002 to current data are provisional and subject to change

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FR Bd 96

Real-Time Data (current conditions)
WELL NUMBER	BA Ea 18
SITE ID	392045076512501
LOCATION	Lat 39°20´45", long 76°51´25", Hydrologic Unit 02060003, at Granite Owner: Maryland National Guard (U.S. Army).
AQUIFER	Woodstock Granite of Paleozoic age. Aquifer code: 300WDCK.
INSTRUMENTATION	Monthly measurements with electric tape by U.S. Geological Survey personnel.
CHARACTERISTICS	Drilled, unused, water-table well, depth 250 ft; casing diameter 10 in., to 50.7 ft; casing diameter 6 in. with depth to 71.3 ft; open hole.
DATUM	Altitude of land surface is 491 ft above National Geodetic Vertical Datum of 1929, from topographic map. Measuring point: Top of casing, 1.5 ft above land surface.
REMARKS	Maryland Water-Level Network observation well.
PERIOD OF RECORD	March 1956 to current year.
EXTREMES FOR RECORD	Highest water level measured, 13.94 ft below land surface, June 24, 1972; lowest measured, 27.57 ft below land surface, September 13, 1966.
COOPERATORS	Maryland Geological Survey

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FR Cg 1

WELL NUMBER	FR Cg 1
SITE ID	393156077135701
LOCATION	Lat 39°31'56", long 77°13'57", Hydrologic Unit 02070009, at Johnsville
AQUIFER	Ijamsville Formation of Paleozoic age.
INSTRUMENTATION	Monthly measurements with chalked steel tape by U.S. Geological Survey personnel
CHARACTERISTICS	Dug, stone-lined, domestic, water-table well, depth 42.5 ft; diameter 36 in.
DATUM	Elevation of land surface is 600 ft above sea level, from topographic map - measuring point: Top of wooden well cover, 0.60 ft above land surface
REMARKS	Maryland Water-Level Network observation well
PERIOD OF RECORD	July 1946 to current year
EXTREMES FOR RECORD	Highest water level measured, 28.63 ft below land surface, Sept. 29, 1975; lowest measured, 42.02 ft below land surface, Oct. 5, 1982
COOPERATORS	Maryland Geological Survey
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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FR Df 35

WELL NUMBER	FR Df 35
SITE ID	392517077190401
LOCATION	Lat 39°25'17", long 77°19'04", Hydrologic Unit 02070009, north of Eaglehead Drive, near Lake Linganore
AQUIFER	Sams Creek Metabasalt of Paleozoic age
INSTRUMENTATION	Monthly measurements with chalked steel tape by U.S. Geological Survey personnel
CHARACTERISTICS	Drilled, unused, water-table well, depth 302 ft, casing diameter 6 in., to 26 ft, open hole
DATUM	Elevation of land surface is 570 ft above sea level, from topographic map - measuring point: Top of casing, 1.00 ft above land surface
REMARKS	Maryland Water-Level Network observation well
PERIOD OF RECORD	May 1982 to current year
EXTREMES FOR RECORD	Highest water level measured, 44.09 ft below land surface, May 14, 1998; lowest measured, 62.27 ft below land surface, Feb. 9, 1989
COOPERATORS	Maryland Geological Survey
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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MO Cb 26

WELL NUMBER	MO Cb 26
SITE ID	391142077280601
LOCATION	Lat 39°11'42", long 77°28'06", Hydrologic Unit 02070008, 2 mi southwest of Dickerson, at Dickerson Regional Park
AQUIFER	Manassas Sandstone, Poolesville Member of Upper Triassic age
INSTRUMENTATION	Monthly measurements with electric steel tape by U.S. Geological Survey personnel
CHARACTERISTICS	Drilled, observation, artesian well, depth 885 ft; casing diameter 6 in., to 38 ft; open hole
DATUM	Elevation of land surface is 220 ft above sea level - measuring point: Top of casing 8.60 ft above land surface
REMARKS	Maryland Water-Level Network observation well
PERIOD OF RECORD	February 1991 to current year
EXTREMES FOR RECORD	Highest water level, flowing on Jan. 3, 1991, April 3, 1991, April 5, 1993, May 3, 1993, March 7, 1994, April 5, 1994, May 10, 1994, Jan. 29, 1996, Feb. 15, 1996, March 12, 1996, April 11, 1996, May 6, 1996, June 5, 1996, July 2, 1996, Aug. 1, 1996, Oct. 10, 1996, Nov. 4, 1996, Dec. 3, 1996, Jan. 2, 1997, Feb. 3, 1997, March 13, 1997, April 10, 1997, Feb. 3, 1998, March 2, 1998, April 2, 1998, May 11, 1998, and April 13, 2000; lowest measured, 3.97 ft above land surface, Sept. 8, 1999.
COOPERATORS	Maryland Geological Survey
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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MO Cc 14

WELL NUMBER	MO Cc 14
SITE ID	391314077224201
LOCATION	Lat 39°13´14", long 76°22´42", Hydrologic Unit 02070008, at Barnesville
AQUIFER	Ijamsville Formation of Paleozoic age
INSTRUMENTATION	Monthly measurements with electric tape by U.S. Geological Survey personnel.
CHARACTERISTICS	Dug, stone-lined, unused water-table well, depth 46 ft; casing diameter 60 to 24 in.
DATUM	Elevation of land surface is 560 ft above sea level, from topographic map. Measuring point: Top of wooden well cover, 3.00 ft avove land surface.
REMARKS	Maryland Water-Level Network observation well.
PERIOD OF RECORD	November 1952 to current year.
EXTREMES FOR RECORD	Highest water level measured, 18.00 ft below land surface, April 5, 1993; lowest measured, dry, on Dec. 2, 1957, Dec. 6, 1965, Jan. 3, 1966, Feb. 2, 1966.
COOPERATORS	Maryland Geological Survey
Download the data for the entire period of record for this well NOTE: October 2002 to current data are provisional and subject to change

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MO Ec 10

WELL NUMBER	MO Ec 10
SITE ID	390451077245901
LOCATION	Lat 39°04'51", long 77°24'59", Hydrologic Unit 02070008, 3 mi southeast of Poolesville nr Sycamore Landing Road at McKee Besher Wildlife Management Area
AQUIFER	Balls Bluff Siltstone of Upper Triassic age
INSTRUMENTATION	Monthly measurements with electric tape by U.S. Geological Survey personnel
CHARACTERISTICS	Drilled, observation, artesian well, depth 855 ft; casing diameter 8 in., to 26 ft; open hole
DATUM	Elevation of land surface is 200 ft above sea level - measuring point: Top of casing, 1.70 ft above land surface
REMARKS	Maryland Water-Level Network observation well
PERIOD OF RECORD	September 1990 to current year
EXTREMES FOR RECORD	Highest water level measured, 4.70 ft below land surface, Jan. 29, 1996; lowest measured, 14.52 ft below land surface, July 8, 1992
COOPERATORS	Maryland Geological Survey
Download the data for the entire period of record for this well * NOTE: October 2002 to current data are provisional and subject to change

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MO Eh 20

WELL NAME	MO Eh 20
SITE ID	390434076573002
LOCATION	Lat 39°04´34", long 76°57´30", Hydrologic Unit 02070010, at MD Rt. 196 and Fairland Rd., Fairland
AQUIFER	Loch Raven Formation of Cambrian Age
INSTRUMENTATION	Monthly measurements with chalked steel tape by U.S. Geological Survey personnel.
CHARACTERISTICS	Drilled, unused, water-table well, depth 102.9 ft; casing diameter 6 in., to 50 ft; open hole.
DATUM	Elevation of land surface is 405 ft above National Geodetic Vertical Datum of 1929, from topographic map. Measuring point: Top of casing at land-surface datum.
REMARKS	Maryland Water-Level Network observation well.
PERIOD OF RECORD	March 1955 to current year.
EXTREMES FOR RECORD	Highest water level measured, 4.39 ft below land surface, June 25, 1972; lowest measured, 16.67 ft below land surface, Aug. 30, 1999.
COOPERATORS	Maryland Geological Survey
Download the data for the entire period of record for this well NOTE: October 2002 to current data are provisional and subject to change

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PG Bc 16

WELL NAME	PG Bc 16
SITE ID	390151076561501
LOCATION	Lat 39°01´51", long 76°56´15", Hydrologic Unit 02070010, at National Agricultural Research Center, Beltsville
AQUIFER	Patuxent Formation of Lower Cretaceous age
INSTRUMENTATION	Monthly measurements with electric tape by U.S. Geological Survey personnel. Equipped with water-level recorder from Oct. 31, 1962 to Feb. 9, 1965.
CHARACTERISTICS	Dug brick-lined, unused, water-table well, measured depth 27.4 ft; casing diameter 40 in.
DATUM	Elevation of land surface is 190 ft above National Geodetic Vertical Datum of 1929, from topographic map. Measuring point: Top of steel cover, 0.10 ft above land surface.
REMARKS	Maryland Water-Level Network observation well.
PERIOD OF RECORD	September 1962 to current year.
EXTREMES FOR RECORD	Highest water level measured, 17.26 ft below land surface, July 6, 1972; lowest measured, 26.46 ft below land surface, July 8, 1981.
COOPERATORS	Maryland Geological Survey
Download the data for the entire period of record for this well NOTE: October 2002 to current data are provisional and subject to change

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