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Sewerage Systems, Willards, Maryland. NPDES permit MD0051632 expired Feb 28, 2025; its limits still apply. Last 12 months: over a limit once (last March 2026), 2 required values missing, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | E. coli, maximum monthly geometric mean | 349 MPN/100mL | ≤ 126 MPN/100mL | 177% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year |
| Oxygen, dissolved [DO] | minimum | ≥ 5 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 15 mg/L | May–Sep |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 23 mg/L | May–Sep |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 25 lb/d | May–Sep |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 50 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 38 lb/d | May–Sep |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 75 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 8.5 SU | all year |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | maximum monthly average | ≤ 50 lb/d | all year |
| Solids, total suspended | maximum weekly average | ≤ 75 lb/d | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | annual maximum | report only (lb/yr) | all year |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year |
| Nitrogen, organic 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, Kjeldahl, total [as N] | maximum monthly average | ≤ 10 mg/L | May–Sep |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | maximum weekly average | ≤ 15 mg/L | May–Sep |
| Nitrogen, Kjeldahl, total [as N] | maximum monthly average | ≤ 17 lb/d | May–Sep |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Nitrogen, Kjeldahl, total [as N] | maximum weekly average | ≤ 25 lb/d | May–Sep |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | annual maximum | report only (lb/yr) | all year |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | 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 |
| Chlorine, total residual | maximum | ≤ .1 mg/L | all year |
| E. coli | maximum monthly geometric mean | ≤ 126 MPN/100mL | all year |
| Flow, total | total | report only (Mgal/mo) | 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/MD0051632 · MCP: https://passage-data.com/mcp