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Electric Services, major discharger, Charles County, Maryland. NPDES permit MD0002674, in force until Oct 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 001 |
| Oil & Grease | maximum monthly average | ≤ 15 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | all year | 001 |
| Arsenic, total [as As] | monthly average | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | 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 | daily maximum | report only (MGD) | all year | 001 |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 30 mg/L | Mar, Jun, Sep, Dec | 108 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | Mar, Jun, Sep, Dec | 108 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 108 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 108 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 108 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 108 |
| Nitrogen, total [as N] | monthly load | report only (lb/mo) | all year | 108 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 108 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 108 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 108 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 108 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 108 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 108 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 108 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 108 |
| Phosphorus, total [as P] | monthly load | report only (lb/mo) | all year | 108 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 108 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 108 |
| Coliform, fecal general | maximum monthly geometric mean | ≤ 14 MPN/100mL | all year | 108 |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year | 109 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 109 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 109 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 109 |
| pH | minimum | ≥ 6.5 SU | all year | 110 |
| pH | maximum | ≤ 8.5 SU | all year | 110 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 110 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 110 |
| Oil & Grease | maximum monthly average | ≤ 15 mg/L | Mar, Jun, Sep, Dec | 110 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | Mar, Jun, Sep, Dec | 110 |
| Arsenic, total [as As] | monthly average | report only (mg/L) | all year | 110 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 110 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 110 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 110 |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year | 110 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 110 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 111 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 111 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 112 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 112 |
| Nitrogen, total [as N] | monthly load | report only (lb/mo) | all year | 112 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 112 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 112 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 112 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 112 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 112 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 112 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 112 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 112 |
| Phosphorus, total [as P] | monthly load | report only (lb/mo) | all year | 112 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 112 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 112 |
| pH | minimum | ≥ 6 SU | all year | 801 |
| pH | daily maximum | ≤ 9 SU | all year | 801 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 801 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 801 |
| Oil & Grease | maximum monthly average | ≤ 15 mg/L | Mar, Jun, Sep, Dec | 801 |
| Oil & Grease | daily maximum | ≤ 20 mg/L | Mar, Jun, Sep, Dec | 801 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 801 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 801 |
| Nitrogen, total [as N] | annual maximum | ≤ 394 lb/yr | all year | 801 |
| Nitrogen, total [as N] | monthly load | report only (lb/d) | all year | 801 |
| Nitrogen, total [as N] | monthly average | report only (lb/mo) | all year | 801 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 801 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 801 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 801 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 801 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 801 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 801 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 801 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 801 |
| Phosphorus, total [as P] | monthly load | report only (lb/mo) | all year | 801 |
| Phosphorus, total [as P] | annual maximum | ≤ 118.7 lb/yr | all year | 801 |
| Phosphorus, total [as P] | monthly average | report only (lb/mo) | all year | 801 |
| Arsenic | monthly average | report only (ug/L) | all year | 801 |
| Arsenic | daily maximum | report only (ug/L) | all year | 801 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 801 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 801 |
| Mercury, total [as Hg] | monthly average | report only (ug/L) | all year | 801 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 801 |
Cited limits by parameter: Maryland's rules and the federal ones.
Same industry: the 8 Electric Services permits in Maryland.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MD0002674 · MCP: https://passage-data.com/mcp