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Cement, Hydraulic, Union Bridge, Maryland. NPDES permit MD0000779, in force until Oct 31, 2027. 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 | 011 |
| pH | minimum | ≥ 6.5 SU | all year | 011 |
| pH | maximum | ≤ 8.5 SU | all year | 011 |
| pH | maximum | ≤ 8.5 SU | all year | 011 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 011 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 011 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 011 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 011 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 011 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 011 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrogen, organic total [as N] | monthly average | report only (lb/d) | all year | 011 |
| Nitrogen, organic total [as N] | monthly average | report only (lb/d) | all year | 011 |
| Nitrogen, organic total [as N] | daily maximum | report only (lb/d) | all year | 011 |
| Nitrogen, organic total [as N] | daily maximum | report only (lb/d) | all year | 011 |
| Ammonia nitrogen, total, [as N] 30 day | monthly average | report only (mg/L) | all year | 011 |
| Ammonia nitrogen, total, [as N] 30 day | monthly average | report only (mg/L) | all year | 011 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (mg/L) | all year | 011 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (mg/L) | all year | 011 |
| Ammonia nitrogen, total, [as N] 30 day | monthly average | report only (lb/d) | all year | 011 |
| Ammonia nitrogen, total, [as N] 30 day | monthly average | report only (lb/d) | all year | 011 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (lb/d) | all year | 011 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (lb/d) | all year | 011 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 011 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 011 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year | 011 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year | 011 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 011 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 011 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 011 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 011 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (lb/d) | all year | 011 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (lb/d) | all year | 011 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 011 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 011 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 011 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 011 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 011 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 011 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 011 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 011 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| pH | minimum | ≥ 6.5 SU | all year | 012 |
| pH | minimum | ≥ 6.5 SU | all year | 012 |
| pH | maximum | ≤ 8.5 SU | all year | 012 |
| pH | maximum | ≤ 8.5 SU | all year | 012 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 012 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 012 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 012 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 012 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 012 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 012 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 012 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 012 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 012 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 012 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 012 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 012 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 012 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 012 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 012 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 012 |
| Nitrogen, organic total [as N] | monthly average | report only (lb/d) | all year | 012 |
| Nitrogen, organic total [as N] | monthly average | report only (lb/d) | all year | 012 |
| Nitrogen, organic total [as N] | daily maximum | report only (lb/d) | all year | 012 |
| Nitrogen, organic total [as N] | daily maximum | report only (lb/d) | all year | 012 |
| Ammonia nitrogen, total, [as N] 30 day | monthly average | report only (mg/L) | all year | 012 |
| Ammonia nitrogen, total, [as N] 30 day | monthly average | report only (mg/L) | all year | 012 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (mg/L) | all year | 012 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (mg/L) | all year | 012 |
| Ammonia nitrogen, total, [as N] 30 day | monthly average | report only (lb/d) | all year | 012 |
| Ammonia nitrogen, total, [as N] 30 day | monthly average | report only (lb/d) | all year | 012 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (lb/d) | all year | 012 |
| Ammonia nitrogen, total, [as N] 30 day | daily maximum | report only (lb/d) | all year | 012 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 012 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 012 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 012 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 012 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 012 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 012 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year | 012 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | all year | 012 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 012 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 012 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 012 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 012 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 012 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 012 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (lb/d) | all year | 012 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (lb/d) | all year | 012 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 012 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 012 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 012 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 012 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 012 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 012 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 012 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 012 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | all year | 012 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | all year | 012 |
| Flow | monthly average | report only (MGD) | all year | 012 |
| Flow | monthly average | report only (MGD) | all year | 012 |
| Flow | daily maximum | report only (MGD) | all year | 012 |
| Flow | daily maximum | report only (MGD) | all year | 012 |
Cited limits by parameter: Maryland's rules and the federal ones.
Same industry: the 3 Stone, Clay, Glass and Concrete Products 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/MD0000779 · MCP: https://passage-data.com/mcp