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Wash Aqueduct-Dalecarlia Plant

Federal facility (Water Supply), major discharger, Washington, the District of Columbia. NPDES permit DC0000019 expired May 31, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 61 days after each period: outfall 002Q form C every 4 months (44 values), outfall 002Q form EC, outfall 006 form I, outfall 008 form I, outfall 009 form I
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 4 reports late

Limits in force (222)

ParameterStatisticLimitMonthsOutfall
Colorper dischargereport only (mg/L)all year002Q
Radioactivityper dischargereport only (Ci/mL)all year002Q
pHmaximum≤ 8.5 SUall year002Q
pHmaximum≤ 8.5 SUall year002Q
pHminimum≥ 6 SUall year002Q
pHminimum≥ 6 SUall year002Q
Solids, total suspendedmonthly average≤ 30 mg/Lall year002Q
Solids, total suspendedmonthly average≤ 30 mg/Lall year002Q
Solids, total suspendeddaily maximum≤ 60 mg/Lall year002Q
Solids, total suspendeddaily maximum≤ 60 mg/Lall year002Q
Solids, total suspendedmonthly averagereport only (lb/d)all year002Q
Solids, total suspendedmonthly averagereport only (lb/d)all year002Q
Solids, total suspendeddaily maximumreport only (lb/d)all year002Q
Solids, total suspendeddaily maximumreport only (lb/d)all year002Q
Oil & Greaseper dischargereport only (mg/L)all year002Q
Nitrogen, total [as N]monthly averagereport only (mg/L)all year002Q
Nitrogen, total [as N]monthly averagereport only (mg/L)all year002Q
Nitrogen, total [as N]daily maximumreport only (mg/L)all year002Q
Nitrogen, total [as N]daily maximumreport only (mg/L)all year002Q
Nitrogen, total [as N]monthly averagereport only (lb/d)all year002Q
Nitrogen, total [as N]monthly averagereport only (lb/d)all year002Q
Nitrogen, total [as N]daily maximumreport only (lb/d)all year002Q
Nitrogen, total [as N]daily maximumreport only (lb/d)all year002Q
Nitrogen, organic total [as N]per dischargereport only (mg/L)all year002Q
Nitrite + Nitrate total [as N]per dischargereport only (mg/L)all year002Q
Phosphorus, total [as P]monthly averagereport only (mg/L)all year002Q
Phosphorus, total [as P]monthly averagereport only (mg/L)all year002Q
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002Q
Phosphorus, total [as P]daily maximumreport only (mg/L)all year002Q
Phosphorus, total [as P]per dischargereport only (mg/L)all year002Q
Phosphorus, total [as P]monthly averagereport only (lb/d)all year002Q
Phosphorus, total [as P]monthly averagereport only (lb/d)all year002Q
Phosphorus, total [as P]daily maximumreport only (lb/d)all year002Q
Phosphorus, total [as P]daily maximumreport only (lb/d)all year002Q
Cyanide, total [as CN]per dischargereport only (ug/L)all year002Q
Sulfite [as SO3]per dischargereport only (mg/L)all year002Q
Sulfide, total [as S]per dischargereport only (mg/L)all year002Q
Magnesium, total [as Mg]per dischargereport only (mg/L)all year002Q
Fluoride, total [as F]per dischargereport only (mg/L)all year002Q
Arsenic, total [as As]per dischargereport only (ug/L)all year002Q
Barium, total [as Ba]per dischargereport only (mg/L)all year002Q
Beryllium, total [as Be]per dischargereport only (ug/L)all year002Q
Cadmium, total [as Cd]per dischargereport only (ug/L)all year002Q
Chromium, total [as Cr]per dischargereport only (ug/L)all year002Q
Cobalt, total [as Co]per dischargereport only (mg/L)all year002Q
Copper, total [as Cu]per dischargereport only (ug/L)all year002Q
Iron, total [as Fe]per dischargereport only (mg/L)all year002Q
Lead, total [as Pb]per dischargereport only (ug/L)all year002Q
Manganese, total [as Mn]per dischargereport only (mg/L)all year002Q
Thallium, total [as Tl]per dischargereport only (ug/L)all year002Q
Molybdenum, total [as Mo]per dischargereport only (mg/L)all year002Q
Nickel, total [as Ni]per dischargereport only (ug/L)all year002Q
Silver, total [as Ag]per dischargereport only (ug/L)all year002Q
Zinc, total [as Zn]per dischargereport only (ug/L)all year002Q
Antimony, total [as Sb]per dischargereport only (ug/L)all year002Q
Tin, total [as Sn]per dischargereport only (mg/L)all year002Q
Aluminum, total [as Al]monthly average≤ 4 mg/Lall year002Q
Aluminum, total [as Al]monthly average≤ 4 mg/Lall year002Q
Aluminum, total [as Al]daily maximum≤ 8 mg/Lall year002Q
Aluminum, total [as Al]daily maximum≤ 8 mg/Lall year002Q
Aluminum, total [as Al]per dischargereport only (mg/L)all year002Q
Selenium, total [as Se]per dischargereport only (ug/L)all year002Q
Titanium, total [as Ti]per dischargereport only (mg/L)all year002Q
Dichloromethaneper dischargereport only (ug/L)all year002Q
Dichlorobromomethaneper dischargereport only (ug/L)all year002Q
Carbon tetrachlorideper dischargereport only (ug/L)all year002Q
1,2-Dichloroethaneper dischargereport only (ug/L)all year002Q
Bromoformper dischargereport only (ug/L)all year002Q
Chloroformmonthly averagereport only (mg/L)all year002Q
Chloroformmonthly averagereport only (mg/L)all year002Q
Chloroformdaily maximumreport only (mg/L)all year002Q
Chloroformdaily maximumreport only (mg/L)all year002Q
Chloroformper dischargereport only (ug/L)all year002Q
Tolueneper dischargereport only (ug/L)all year002Q
Benzeneper dischargereport only (ug/L)all year002Q
Acenaphthyleneper dischargereport only (ug/L)all year002Q
Acenaphtheneper dischargereport only (ug/L)all year002Q
Acroleinper dischargereport only (ug/L)all year002Q
Acrylonitrileper dischargereport only (ug/L)all year002Q
Anthraceneper dischargereport only (ug/L)all year002Q
Benzo[k]fluorantheneper dischargereport only (ug/L)all year002Q
Benzo[a]pyreneper dischargereport only (ug/L)all year002Q
Bis[2-chloroethyl] etherper dischargereport only (ug/L)all year002Q
Bis[2-chloroethoxy]methaneper dischargereport only (ug/L)all year002Q
Bis[2-chloroisopropyl] etherper dischargereport only (ug/L)all year002Q
Butyl benzyl phthalateper dischargereport only (ug/L)all year002Q
Chlorobenzeneper dischargereport only (ug/L)all year002Q
Chlorodibromomethaneper dischargereport only (ug/L)all year002Q
Chryseneper dischargereport only (ug/L)all year002Q
Diethyl phthalateper dischargereport only (ug/L)all year002Q
Dimethyl phthalateper dischargereport only (ug/L)all year002Q
1,2-Diphenylhydrazineper dischargereport only (ug/L)all year002Q
Endosulfan sulfateper dischargereport only (ug/L)all year002Q
Endrin aldehydeper dischargereport only (ug/L)all year002Q
Ethylbenzeneper dischargereport only (ug/L)all year002Q
Fluoreneper dischargereport only (ug/L)all year002Q
Hexachlorocyclopentadieneper dischargereport only (ug/L)all year002Q
Hexachloroethaneper dischargereport only (ug/L)all year002Q
Indeno[1,2,3-cd]pyreneper dischargereport only (ug/L)all year002Q
Isophoroneper dischargereport only (ug/L)all year002Q
Methyl chloride [Chloromethane]per dischargereport only (ug/L)all year002Q
N-Nitrosodi-N-propylamineper dischargereport only (ug/L)all year002Q
N-Nitrosodiphenylamineper dischargereport only (ug/L)all year002Q
N-Nitrosodimethylamine [NDMA]per dischargereport only (ug/L)all year002Q
Nitrobenzeneper dischargereport only (ug/L)all year002Q
Phenanthreneper dischargereport only (ug/L)all year002Q
Pyreneper dischargereport only (ug/L)all year002Q
Tetrachloroethyleneper dischargereport only (ug/L)all year002Q
1,1-Dichloroethaneper dischargereport only (ug/L)all year002Q
1,1-Dichloroethyleneper dischargereport only (ug/L)all year002Q
1,1,1-Trichloroethaneper dischargereport only (ug/L)all year002Q
1,1,2-Trichloroethaneper dischargereport only (ug/L)all year002Q
1,1,2,2-Tetrachloroethaneper dischargereport only (ug/L)all year002Q
Benzo[ghi]peryleneper dischargereport only (ug/L)all year002Q
Benzo[a]anthraceneper dischargereport only (ug/L)all year002Q
1,2-Dichlorobenzeneper dischargereport only (ug/L)all year002Q
1,2-Dichloropropaneper dischargereport only (ug/L)all year002Q
1,2,4-Trichlorobenzeneper dischargereport only (ug/L)all year002Q
Dibenz[a,h]anthraceneper dischargereport only (ug/L)all year002Q
1,3-Dichlorobenzeneper dischargereport only (ug/L)all year002Q
1,4-Dichlorobenzeneper dischargereport only (ug/L)all year002Q
2-Chloroethyl vinyl ether, [mixed]per dischargereport only (ug/L)all year002Q
2-Chloronaphthaleneper dischargereport only (ug/L)all year002Q
2-Chlorophenolper dischargereport only (ug/L)all year002Q
2-Nitrophenolper dischargereport only (ug/L)all year002Q
Di-n-octyl phthalateper dischargereport only (ug/L)all year002Q
2,4-Dichlorophenolper dischargereport only (ug/L)all year002Q
2,4-Dimethylphenolper dischargereport only (ug/L)all year002Q
2,4-Dinitrotolueneper dischargereport only (ug/L)all year002Q
2,4-Dinitrophenolper dischargereport only (ug/L)all year002Q
2,4,6-Trichlorophenolper dischargereport only (ug/L)all year002Q
2,6-Dinitrotolueneper dischargereport only (ug/L)all year002Q
3,3'-Dichlorobenzidineper dischargereport only (ug/L)all year002Q
4-Bromophenyl phenyl etherper dischargereport only (ug/L)all year002Q
4-Chlorophenyl phenyl etherper dischargereport only (ug/L)all year002Q
4-Nitrophenolper dischargereport only (ug/L)all year002Q
4,6-Dinitro-o-cresolper dischargereport only (ug/L)all year002Q
PCB-1016per dischargereport only (ug/L)all year002Q
Phenolper dischargereport only (ug/L)all year002Q
Naphthaleneper dischargereport only (ug/L)all year002Q
Surfactants [MBAS]per dischargereport only (mg/L)all year002Q
1,2-Dichloroetheneper dischargereport only (ug/L)all year002Q
Bromomethaneper dischargereport only (ug/L)all year002Q
Pentachlorophenolper dischargereport only (ug/L)all year002Q
Di[2-ethylhexyl] phthalate [DEHP]per dischargereport only (ug/L)all year002Q
Di-n-butyl phthalateper dischargereport only (ug/L)all year002Q
Benzidineper dischargereport only (ug/L)all year002Q
Vinyl chlorideper dischargereport only (ug/L)all year002Q
Trichloroethyleneper dischargereport only (ug/L)all year002Q
4,4'-DDTper dischargereport only (ug/L)all year002Q
4,4'-DDDper dischargereport only (ug/L)all year002Q
4,4'-DDEper dischargereport only (ug/L)all year002Q
Aldrinper dischargereport only (ug/L)all year002Q
Dieldrinper dischargereport only (ug/L)all year002Q
Endosulfan, totalper dischargereport only (ug/L)all year002Q
Endrinper dischargereport only (ug/L)all year002Q
Toxapheneper dischargereport only (ug/L)all year002Q
Heptachlorper dischargereport only (ug/L)all year002Q
Heptachlor epoxideper dischargereport only (ug/L)all year002Q
PCB-1221per dischargereport only (ug/L)all year002Q
PCB-1232per dischargereport only (ug/L)all year002Q
PCB-1242per dischargereport only (ug/L)all year002Q
PCB-1248per dischargereport only (ug/L)all year002Q
PCB-1254per dischargereport only (ug/L)all year002Q
PCB-1260per dischargereport only (ug/L)all year002Q
Hexachlorobenzeneper dischargereport only (ug/L)all year002Q
Hexachlorobutadieneper dischargereport only (ug/L)all year002Q
Phenolsper dischargereport only (ug/L)all year002Q
Chlorine, total residualmonthly average< .1 mg/Lall year002Q
Chlorine, total residualmonthly average< .1 mg/Lall year002Q
Chlorine, total residualdaily maximum< .1 mg/Lall year002Q
Chlorine, total residualdaily maximum< .1 mg/Lall year002Q
Chlorine, total residualper dischargereport only (mg/L)all year002Q
Chlordaneper dischargereport only (ug/L)all year002Q
Perchlorate [ClO4]monthly averagereport only (mg/L)all year002Q
Perchlorate [ClO4]monthly averagereport only (mg/L)all year002Q
Perchlorate [ClO4]daily maximumreport only (mg/L)all year002Q
Perchlorate [ClO4]daily maximumreport only (mg/L)all year002Q
Bromide [as Br]per dischargereport only (ug/L)all year002Q
Mercury, total [as Hg]per dischargereport only (ug/L)all year002Q
Coliform, fecal generalper dischargereport only (MPN/100mL)all year002Q
1,3-Dichloropropeneper dischargereport only (ug/L)all year002Q
Hexachlorocyclohexane, totalper dischargereport only (ug/L)all year002Q
Benzo[j]fluorantheneper dischargereport only (ug/L)all year002Q
3,4-Benzofluorantheneper dischargereport only (ug/L)all year002Q
Sulfateper dischargereport only (mg/L)all year002Q
Boron, totalper dischargereport only (mg/L)all year002Q
p-Chloro-m-cresolper dischargereport only (ug/L)all year002Q
Chloroethaneper dischargereport only (ug/L)all year002Q
pHminimum≥ 6 SUall year006
pHmaximum≤ 8.5 SUall year006
Solids, total suspendeddaily maximum≤ 60 mg/Lall year006
Solids, total suspendeddaily maximumreport only (lb/d)all year006
Nitrogen, total [as N]daily maximumreport only (mg/L)all year006
Nitrogen, total [as N]daily maximumreport only (lb/d)all year006
Phosphorus, total [as P]daily maximumreport only (mg/L)all year006
Phosphorus, total [as P]daily maximumreport only (lb/d)all year006
Aluminum, total [as Al]daily maximum≤ 2.07 mg/Lall year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Chlorine, total residualdaily maximum< .1 mg/Lall year006
pHminimum≥ 6 SUall year008
pHmaximum≤ 8.5 SUall year008
Solids, total suspendeddaily maximum≤ 60 mg/Lall year008
Solids, total suspendeddaily maximumreport only (lb/d)all year008
Nitrogen, total [as N]daily maximumreport only (mg/L)all year008
Nitrogen, total [as N]daily maximumreport only (lb/d)all year008
Phosphorus, total [as P]daily maximumreport only (mg/L)all year008
Phosphorus, total [as P]daily maximumreport only (lb/d)all year008
Aluminum, total [as Al]daily maximum≤ 1.7 mg/Lall year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
Chlorine, total residualdaily maximum< .1 mg/Lall year008
pHminimum≥ 6 SUall year009
pHmaximum≤ 8.5 SUall year009
Solids, total suspendeddaily maximum≤ 60 mg/Lall year009
Solids, total suspendeddaily maximumreport only (lb/d)all year009
Nitrogen, total [as N]daily maximumreport only (mg/L)all year009
Nitrogen, total [as N]daily maximumreport only (lb/d)all year009
Phosphorus, total [as P]daily maximumreport only (mg/L)all year009
Phosphorus, total [as P]daily maximumreport only (lb/d)all year009
Aluminum, total [as Al]daily maximum≤ 1.7 mg/Lall year009
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year009
Chlorine, total residualdaily maximum< .1 mg/Lall year009

How strict are these limits?

Cited limits by parameter: the District of Columbia's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/DC0000019 · MCP: https://passage-data.com/mcp