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Steam And Air-Conditioning Supply, Baltimore, Maryland. NPDES permit MD0071196, in force until Aug 31, 2027. Last 12 months: over a limit 8 times (last November 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 001 | Copper, total [as Cu], daily maximum | .14 mg/L | ≤ .013 mg/L | 977% |
| October 2025 | 001 | Copper, total [as Cu], monthly average | .14 mg/L | ≤ .009 mg/L | 1456% |
| October 2025 | 002 | Copper, total [as Cu], daily maximum | .14 mg/L | ≤ .013 mg/L | 977% |
| October 2025 | 002 | Copper, total [as Cu], monthly average | .14 mg/L | ≤ .009 mg/L | 1456% |
| November 2025 | 001 | Copper, total [as Cu], daily maximum | .11 mg/L | ≤ .013 mg/L | 746% |
| November 2025 | 001 | Copper, total [as Cu], monthly average | .11 mg/L | ≤ .009 mg/L | 1122% |
| November 2025 | 002 | Copper, total [as Cu], daily maximum | .1 mg/L | ≤ .013 mg/L | 669% |
| November 2025 | 002 | Copper, total [as Cu], monthly average | .1 mg/L | ≤ .009 mg/L | 1011% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Phosphorus, total [as P] | monthly 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] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, dissolved [as Cu] | monthly average | report only (mg/L) | all year | 001 |
| Copper, dissolved [as Cu] | monthly average | report only (mg/L) | all year | 001 |
| Copper, dissolved [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, dissolved [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ .009 mg/L | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ .009 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .013 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .013 mg/L | all year | 001 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | all year | 001 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | all year | 001 |
| Chlorine, total residual | monthly average | < .1 mg/L | all year | 001 |
| Chlorine, total residual | monthly average | < .1 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | < .1 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | < .1 mg/L | all year | 001 |
| Flow | monthly average | report only (MGD) | all year | 001 |
| Flow | monthly average | report only (MGD) | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Copper, dissolved [as Cu] | monthly average | report only (mg/L) | all year | 002 |
| Copper, dissolved [as Cu] | monthly average | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | ≤ .009 mg/L | all year | 002 |
| Copper, total [as Cu] | monthly average | ≤ .009 mg/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ .013 mg/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ .013 mg/L | all year | 002 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | all year | 002 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | monthly average | ≤ .1 mg/L | all year | 002 |
| Chlorine, total residual | monthly average | ≤ .1 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year | 002 |
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/MD0071196 · MCP: https://passage-data.com/mcp