WASHINGTON AQUEDUCT, Washington, DC: NPDES DC0000019 discharge permit, effluent exceedances, inspections, penalties

WASHINGTON AQUEDUCT, Washington, District of Columbia: Individual permit DC0000019, held by WASH AQUEDUCT-DALECARLIA PLANT; Administratively continued; issued October 20, 2008, term to November 19, 2013; discharges to POTOMAC RIVER.

1 of the 12 pollutants listed for NPDES DC0000019 have no violation or effluent exceedance.

• Solids, total suspended: 16 limits, 190 violations of any kind, 172 effluent exceedances, latest September 30, 2024, largest 1,335,333% over the limit.
• Aluminum, total [as Al]: 14 limits, 178 violations of any kind, 168 effluent exceedances, latest September 30, 2024, largest 959,900% over the limit.
• Solids, suspended percent removal: 3 limits, 88 violations of any kind, 85 effluent exceedances, latest February 28, 2015, largest 567% over the limit.
• Iron, total recoverable: 14 limits, 44 violations of any kind, 38 effluent exceedances, latest February 28, 2015, largest 30,321% over the limit.
• Copper, total [as Cu]: 6 limits, 42 violations of any kind, 38 effluent exceedances, latest February 28, 2015, largest 23,488% over the limit.
• Chlorine, total residual: 6 limits, 15 violations of any kind, 8 effluent exceedances, latest March 31, 2023, largest 3,100% over the limit.
• pH: 16 limits, 21 violations of any kind, 1 effluent exceedance, latest August 31, 2003.
• Iron, dissolved [as Fe]: 18 limits, 84 violations of any kind.
• Flow, in conduit or thru treatment plant: 18 limits, 84 violations of any kind.
• Copper, dissolved [as Cu]: 6 limits, 4 violations of any kind.
• Perchlorate [ClO4]: 2 limits, 1 violation of any kind.
• Chloroform: 2 limits.

• June 25, 2026: Effluent Violations - Unapproved Bypass (EP6).
• June 25, 2026: Evaluation (S).
• June 22, 2026: Effluent Violations - Unapproved Bypass (EP6).
• June 22, 2026: Evaluation (S).
• May 12, 2026: Effluent Violations - Unapproved Bypass (EP6).
• May 12, 2026: Evaluation (S).
• May 21, 2018: Effluent Violations - Numeric effluent violation (EP6).
• July 17, 2017: Effluent Violations - Numeric effluent violation (EP6).

Other permits held by WASH AQUEDUCT-DALECARLIA PLANT

• WASH AQUEDUCT-DALECARLIA PLANT, Washington: DCL000019, issued 2021-01-01

WASHINGTON AQUEDUCT among its neighbors

47 discharge permits are in the Nichols Run-Potomac River subwatershed (HUC 020700081005); DC0000019 is one. Its county: 242, 4 major; DC0000019 is major permit.

Other permits in the Nichols Run-Potomac River subwatershed (HUC 020700081005)

• 119 COMMONAGE DRIVE, Great Falls: VAR10T604, minor, term to 2024-06-30
• 3900 NEBRASKA AVENUE NW, Washington: DCR1000DX, minor, term to 2027-02-16
• 4201 ALBEMARLE STREET NW, Washington: 03R10I014, minor, term to 2027-02-16
• 4425-4469 TINDALL STREET NW, Washington: DCR1000CQ, minor, term to 2027-02-16
• 4800 WOODWAY LANE, NW, Washington: DCR100041, minor, term to 2022-02-15
• 495 EXPRESS LANES NORTHERN EXTENSION, Mclean: VAR10R056, minor, term to 2024-06-30
• 661 MINE RIDGE ROAD, Falls Church: VAR10T417, minor, term to 2024-06-30
• 7940 JONES BRANCH DRIVE, Mclean: VAR10T873, minor, term to 2024-06-30
• ACADIA, Mclean: VAR10U424, minor, term to 2029-06-30
• ARBOR ROW BLOCK C-2, Mclean: VAR10X315, minor, term to 2029-06-30