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Sewage treatment plant, Galena, Maryland. NPDES permit MD0020605, in force until May 31, 2027. Last 12 months: over a limit 10 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | Solids, total suspended, maximum monthly average | 18.5 mg/L | ≤ 16 mg/L | 16% |
| November 2025 | Solids, total suspended, maximum weekly average | 26.15 lb/d | ≤ 23 lb/d | 14% |
| November 2025 | Solids, total suspended, maximum weekly average | 64 mg/L | ≤ 24 mg/L | 167% |
| December 2025 | BOD, 5-day, 20 deg. C, maximum monthly average | 19.5 mg/L | ≤ 16 mg/L | 22% |
| December 2025 | BOD, 5-day, 20 deg. C, maximum weekly average | 30 mg/L | ≤ 24 mg/L | 25% |
| December 2025 | Nitrogen, ammonia total [as N], maximum monthly average | 14.22 lb/d | ≤ 4.5 lb/d | 216% |
| December 2025 | Nitrogen, ammonia total [as N], maximum monthly average | 71.25 mg/L | ≤ 4.9 mg/L | 1354% |
| January 2026 | BOD, 5-day, 20 deg. C, maximum weekly average | 27 mg/L | ≤ 24 mg/L | 13% |
| January 2026 | Nitrogen, ammonia total [as N], maximum monthly average | 13.83 mg/L | ≤ 4.9 mg/L | 182% |
| February 2026 | Nitrogen, ammonia total [as N], maximum monthly average | 5.43 mg/L | ≤ 4.9 mg/L | 11% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year | 002 |
| Oxygen, dissolved [DO] | minimum weekly average | ≥ 6 mg/L | Feb–May | 002 |
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 5.5 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 16 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 24 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 15 lb/d | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 23 lb/d | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 8.5 SU | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 16 mg/L | all year | 002 |
| Solids, total suspended | maximum weekly average | ≤ 24 mg/L | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 15 lb/d | all year | 002 |
| Solids, total suspended | maximum weekly average | ≤ 23 lb/d | all year | 002 |
| Solids, total suspended | cumulative total | ≤ 5482 lb/yr | all year | 002 |
| Solids, total suspended | monthly total | report only (lb/mo) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 002 |
| Nitrogen, total [as N] | cumulative total | ≤ 1339 lb/yr | all year | 002 |
| Nitrogen, total [as N] | annual total | report only (lb/yr) | all year | 002 |
| Nitrogen, total [as N] | annual total | report only (lb/yr) | all year | 002 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.1 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 4.9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.9 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 4.5 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, Kjeldahl, dissolved [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | 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] | cumulative total | ≤ 101 lb/yr | all year | 002 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 002 |
| Phosphorus, total [as P] | annual total | report only (lb/yr) | all year | 002 |
| Phosphorus, total [as P] | annual total | report only (lb/yr) | all year | 002 |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | 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 |
| Chlorine, total residual | maximum | ≤ .1 mg/L | all year | 002 |
| Enterococci | maximum | ≤ 35 MPN/100mL | all year | 002 |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | all year | 002 |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year | 002 |
| Flow, total | total | report only (Mgal/mo) | all year | 002 |
| Flow, total | annual total | report only (Mgal/yr) | all year | 002 |
| Flow, total | annual total | report only (Mgal/yr) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 101 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 101 |
| Solids, total suspended | cumulative total | report only (lb/yr) | all year | TRAD |
| Solids, total suspended | cumulative total | report only (lb/yr) | all year | TRAD |
| Nitrogen, total [as N] | cumulative total | report only (lb/yr) | all year | TRAD |
| Nitrogen, total [as N] | cumulative total | report only (lb/yr) | all year | TRAD |
| Phosphorus, total [as P] | cumulative total | report only (lb/yr) | all year | TRAD |
| Phosphorus, total [as P] | cumulative total | report only (lb/yr) | all year | TRAD |
| Flow | year-to-date total | report only (Mgal/yr) | all year | TRAD |
Cited limits by parameter: Maryland's rules and the federal ones.
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