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Industrial or other facility, Baltimore, Maryland. NPDES permit MDDRG3890, in force until Nov 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | maximum monthly average | ≤ 75 mg/L | all year |
| Solids, total suspended | maximum monthly average | ≤ 75 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 150 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 150 mg/L | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/yr) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/yr) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/mo) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/mo) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/yr) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/yr) | all year |
| Nitrogen, total [as N] | annual maximum | report only (lb/mo) | all year |
| Nitrogen, total [as N] | annual maximum | report only (lb/mo) | all year |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .3 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .3 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/yr) | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/yr) | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/mo) | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/mo) | all year |
| Phosphorus, total [as P] | annual maximum | report only (lb/yr) | all year |
| Phosphorus, total [as P] | annual maximum | report only (lb/yr) | all year |
| Phosphorus, total [as P] | annual maximum | report only (lb/mo) | all year |
| Phosphorus, total [as P] | annual maximum | report only (lb/mo) | all year |
| Copper, total [as Cu] | maximum monthly average | ≤ 3.1 ug/L | all year |
| Copper, total [as Cu] | maximum monthly average | ≤ 3.1 ug/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ 4.8 ug/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ 4.8 ug/L | all year |
| Lead, total [as Pb] | maximum monthly average | ≤ 8.1 ug/L | all year |
| Lead, total [as Pb] | maximum monthly average | ≤ 8.1 ug/L | all year |
| Lead, total [as Pb] | daily maximum | ≤ 210 ug/L | all year |
| Lead, total [as Pb] | daily maximum | ≤ 210 ug/L | all year |
| Zinc, total [as Zn] | maximum monthly average | ≤ 81 ug/L | all year |
| Zinc, total [as Zn] | maximum monthly average | ≤ 81 ug/L | all year |
| Zinc, total [as Zn] | daily maximum | ≤ 90 ug/L | all year |
| Zinc, total [as Zn] | daily maximum | ≤ 90 ug/L | all year |
| PCB, total, scan effluent | daily maximum | report only (ug/L) | all year |
| PCB, total, scan effluent | daily maximum | report only (ug/L) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (Mgal/6mo) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (Mgal/6mo) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (Mgal/6mo) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (Mgal/6mo) | all year |
| Chlordane | daily maximum | report only (ug/L) | all year |
| Chlordane | daily maximum | report only (ug/L) | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Lead, total [as Pb], daily maximum | 0.21 ug/L | tighter | — | — |
| Lead, total [as Pb], maximum monthly average | 0.21 ug/L | tighter | — | — |
| Zinc, total [as Zn], daily maximum | 0.57 ug/L | tighter | — | — |
| Zinc, total [as Zn], maximum monthly average | 0.57 ug/L | tighter | — | — |
Cited limits by parameter: Maryland'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/MDDRG3890 · MCP: https://passage-data.com/mcp