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Federal facility (Ammunition, Except For Small Arms), major discharger, Indian Head, Maryland. NPDES permit MD0003158, in force until May 31, 2027. Last 12 months: over a limit 3 times (last January 2026), 25 required values missing, 3 of 67 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Chlorine, total residual, daily maximum | .15 mg/L | ≤ .1 mg/L | 50% |
| December 2025 | Chlorine, total residual, daily maximum | .55 mg/L | ≤ .1 mg/L | 450% |
| January 2026 | Chlorine, total residual, daily maximum | .62 mg/L | ≤ .1 mg/L | 520% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temp. diff. between samp. & upstrm deg. F | daily maximum | ≤ 0 deg F | May–Sep |
| Temp. diff. between samp. & upstrm deg. F | daily maximum | ≤ 0 deg F | May–Sep |
| Temp. diff. between samp. & upstrm deg. F | daily maximum | ≤ 0 deg F | May–Sep |
| Temp. diff. between samp. & upstrm deg. F | daily maximum | ≤ 0 deg F | May–Sep |
| Temp. diff. between samp. & upstrm deg. F | daily maximum | ≤ 0 deg F | May–Sep |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | 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] | monthly average | report only (lb/mo) | 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] | monthly average | report only (lb/mo) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year |
| Nitrogen, total [as N] | annual maximum | ≤ 5388 lb/yr | Dec |
| Nitrogen, total [as N] | annual maximum | ≤ 5388 lb/yr | Dec |
| Nitrogen, total [as N] | annual maximum | ≤ 1777 lb/yr | Dec |
| Nitrogen, total [as N] | annual maximum | ≤ 1777 lb/yr | Dec |
| 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] | 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] | 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, 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, 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] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year |
| 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] | 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] | 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 |
| 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 |
| 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] | monthly average | 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] | 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] | daily maximum | 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] | daily maximum | report only (mg/L) | 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] | monthly average | report only (lb/mo) | 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] | monthly average | report only (lb/mo) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year |
| Phosphorus, total [as P] | annual maximum | < 602 lb/yr | Dec |
| Phosphorus, total [as P] | annual maximum | < 602 lb/yr | Dec |
| Phosphorus, total [as P] | annual maximum | ≤ 740 lb/yr | Dec |
| Phosphorus, total [as P] | annual maximum | ≤ 740 lb/yr | Dec |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | May–Oct |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | maximum | ≤ .1 mg/L | all year |
| Chlorine, total residual | maximum | ≤ .1 mg/L | all year |
| Chlorine, total residual | monthly average | ≤ .011 mg/L | all year |
| Chlorine, total residual | monthly average | ≤ .1 mg/L | all year |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year |
| Suspended Solids, Total | daily maximum | ≤ 50 mg/L | all year |
| Temp. difference, summer [deg. F] | daily maximum | ≤ 0 deg F | May–Sep |
| Flow | daily maximum | report only (MGD) | all year |
| Flow | monthly average | report only (MGD) | all year |
| Flow | daily maximum | report only (MGD) | all year |
| Flow | daily maximum | report only (MGD) | all year |
| Flow | monthly average | report only (MGD) | all year |
| Flow | daily maximum | report only (MGD) | all year |
| Flow | monthly average | report only (MGD) | all year |
| Flow | monthly average | report only (MGD) | all year |
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/MD0003158 · MCP: https://passage-data.com/mcp