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Sewage treatment plant, major discharger, Washington, the District of Columbia. NPDES permit DC0021199 expired Aug 25, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | monthly average | report only (SU) | all year | 001 |
| pH | weekly average | report only (SU) | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | weekly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | weekly average | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | report only (mg/L) | all year | 001 |
| Chlorine, total residual | weekly average | report only (mg/L) | all year | 001 |
| E. coli, colony forming units [CFU] | monthly average | report only (CFU/100mL) | all year | 001 |
| E. coli, colony forming units [CFU] | weekly average | report only (CFU/100mL) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (mg/L) | all year | 001 |
| Oxygen, dissolved [DO] | minimum | ≥ 4 mg/L | all year | 002 |
| Oxygen, dissolved [DO] | daily average minimum | ≥ 5 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 8.5 SU | all year | 002 |
| Alkalinity, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002 |
| Alkalinity, total [as CaCO3] | weekly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | monthly average | ≤ 6.1 mg/L | all year | 002 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | monthly average | ≤ 19603 lb/d | all year | 002 |
| Solids, total suspended | weekly average | ≤ 29404 lb/d | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | weekly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 002 |
| Nitrogen, total [as N] | weekly average | report only (lb/d) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | weekly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | ≤ .17 mg/L | all year | 002 |
| Phosphorus, total [as P] | weekly average | ≤ .34 mg/L | all year | 002 |
| Phosphorus, total [as P] | monthly average | ≤ 530 lb/d | all year | 002 |
| Phosphorus, total [as P] | weekly average | ≤ 1080 lb/d | all year | 002 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | weekly average | report only (mg/L) | all year | 002 |
| Cadmium, dissolved [as Cd] | monthly average | report only (ug/L) | all year | 002 |
| Cadmium, dissolved [as Cd] | weekly average | report only (ug/L) | all year | 002 |
| Copper, dissolved [as Cu] | monthly average | report only (ug/L) | all year | 002 |
| Copper, dissolved [as Cu] | weekly average | report only (ug/L) | all year | 002 |
| Iron, dissolved [as Fe] | monthly average | report only (ug/L) | all year | 002 |
| Iron, dissolved [as Fe] | weekly average | report only (ug/L) | all year | 002 |
| Lead, dissolved [as Pb] | monthly average | report only (ug/L) | all year | 002 |
| Lead, dissolved [as Pb] | weekly average | report only (ug/L) | all year | 002 |
| Nickel, dissolved [as Ni] | monthly average | report only (ug/L) | all year | 002 |
| Nickel, dissolved [as Ni] | weekly average | report only (ug/L) | all year | 002 |
| Zinc, dissolved [as Zn] | monthly average | report only (ug/L) | all year | 002 |
| Zinc, dissolved [as Zn] | weekly average | report only (ug/L) | all year | 002 |
| Nitrogen, ammonia, total [as NH3] | monthly average | ≤ 10.3 mg/L | Feb–Apr | 002 |
| Nitrogen, ammonia, total [as NH3] | monthly average | ≤ 4.1 mg/L | May–Oct | 002 |
| Nitrogen, ammonia, total [as NH3] | monthly average | ≤ 12.8 mg/L | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia, total [as NH3] | weekly average | ≤ 15.4 mg/L | Feb–Apr | 002 |
| Nitrogen, ammonia, total [as NH3] | weekly average | ≤ 6.1 mg/L | May–Oct | 002 |
| Nitrogen, ammonia, total [as NH3] | weekly average | ≤ 19.3 mg/L | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia, total [as NH3] | monthly average | ≤ 32986 lb/d | Feb–Apr | 002 |
| Nitrogen, ammonia, total [as NH3] | monthly average | ≤ 13130 lb/d | May–Oct | 002 |
| Nitrogen, ammonia, total [as NH3] | monthly average | ≤ 40993 lb/d | Jan, Feb, Nov, Dec | 002 |
| Nitrogen, ammonia, total [as NH3] | weekly average | ≤ 49319 lb/d | Feb–Apr | 002 |
| Nitrogen, ammonia, total [as NH3] | weekly average | ≤ 19536 lb/d | May–Oct | 002 |
| Nitrogen, ammonia, total [as NH3] | weekly average | ≤ 61809 lb/d | Jan, Feb, Nov, Dec | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | weekly average | report only (MGD) | all year | 002 |
| Chlorine, total residual | monthly average | ≤ .1 mg/L | all year | 002 |
| E. coli, colony forming units [CFU] | monthly average | ≤ 126 CFU/100mL | all year | 002 |
| E. coli, colony forming units [CFU] | weekly average | report only (CFU/100mL) | all year | 002 |
| Phosphorous, in total orthophosphate | monthly average | report only (mg/L) | all year | 002 |
| Phosphorous, in total orthophosphate | weekly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as NO3] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrate total [as NO3] | weekly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrite total [as NO2] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrite total [as NO2] | weekly average | report only (mg/L) | all year | 002 |
| Mercury, total recoverable | monthly average | report only (ng/L) | all year | 002 |
| Mercury, total recoverable | weekly average | report only (ng/L) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 5 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 7.5 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 16013 lb/d | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 24019 lb/d | all year | 002 |
Cited limits by parameter: the District of Columbia's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/DC0021199 · MCP: https://passage-data.com/mcp