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Sewage treatment plant, Manchester, Maryland. NPDES permit MD0022578, in force until Feb 28, 2027. Last 12 months: over a limit 27 times (last August 2026), 1 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| December 2025 | 001 | BOD, 5-day, 20 deg. C, maximum weekly average | 189.4 lb/d | ≤ 188 lb/d | 1% |
| December 2025 | 001 | BOD, 5-day, 20 deg. C, maximum weekly average | 74 mg/L | ≤ 45 mg/L | 64% |
| December 2025 | 001 | E. coli, maximum monthly geometric mean | 145 MPN/100mL | ≤ 126 MPN/100mL | 15% |
| December 2025 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 17 mg/L | ≤ 4.6 mg/L | 270% |
| December 2025 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 43.8 lb/d | ≤ 19 lb/d | 131% |
| December 2025 | 001 | Nitrogen, ammonia total [as N], maximum daily average | 37 mg/L | ≤ 14 mg/L | 164% |
| December 2025 | 001 | Nitrogen, ammonia total [as N], maximum daily average | 88.2 lb/d | ≤ 58 lb/d | 52% |
| January 2026 | 001 | E. coli, maximum monthly geometric mean | 228 MPN/100mL | ≤ 126 MPN/100mL | 81% |
| January 2026 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 14 mg/L | ≤ 4.6 mg/L | 204% |
| January 2026 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 34.2 lb/d | ≤ 19 lb/d | 80% |
| January 2026 | 001 | Nitrogen, ammonia total [as N], maximum daily average | 19 mg/L | ≤ 14 mg/L | 36% |
| January 2026 | 001 | Solids, total suspended, maximum weekly average | 45.5 mg/L | ≤ 45 mg/L | 1% |
| February 2026 | 001 | E. coli, maximum monthly geometric mean | 2353 MPN/100mL | ≤ 126 MPN/100mL | 1767% |
| February 2026 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 18.1 mg/L | ≤ 4.6 mg/L | 293% |
| February 2026 | 001 | Nitrogen, ammonia total [as N], maximum monthly average | 44.3 lb/d | ≤ 19 lb/d | 133% |
| February 2026 | 001 | Nitrogen, ammonia total [as N], maximum daily average | 23 mg/L | ≤ 14 mg/L | 64% |
| February 2026 | 001 | Nitrogen, ammonia total [as N], maximum daily average | 68.1 lb/d | ≤ 58 lb/d | 17% |
| February 2026 | 001 | Oxygen, dissolved [DO], instantaneous minimum | 5.2 mg/L | ≥ 6 mg/L | 13% |
| February 2026 | 001 | Phosphorus, total [as P], maximum monthly average | 1.4 mg/L | ≤ 1 mg/L | 40% |
| February 2026 | 001 | Solids, total suspended, maximum weekly average | 47.5 mg/L | ≤ 45 mg/L | 6% |
| February 2026 | 001 | pH, minimum | 6.3 SU | ≥ 6.5 SU | — |
| February 2026 | MWS | Nitrogen, total [as N], average | 10.43 mg/L | ≤ 10 mg/L | 4% |
| March 2026 | 002 | pH, minimum | 6.4 SU | ≥ 6.5 SU | — |
| April 2026 | 002 | pH, minimum | 6.4 SU | ≥ 6.5 SU | — |
| May 2026 | 002 | pH, minimum | 6.4 SU | ≥ 6.5 SU | — |
| August 2026 | 002 | BOD, 5-day, 20 deg. C, monthly average | 70.7 mg/L | ≤ 70 mg/L | 1% |
| August 2026 | 002 | Coliform, fecal general, maximum monthly geometric mean | 873 MPN/100mL | ≤ 200 MPN/100mL | 337% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | maximum daily average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jan, Feb, Mar, Dec | 001 |
| Temperature, water deg. fahrenheit | maximum daily average | report only (deg F) | Jan, Feb, Mar, Dec | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jan, Feb, Mar, Dec | 001 |
| Temperature, water deg. fahrenheit | maximum daily average | report only (deg F) | Jan, Feb, Mar, Dec | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 125 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 188 lb/d | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 125 lb/d | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 188 lb/d | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Dec | 001 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | Jan, Feb, Mar, Dec | 001 |
| Nitrogen, total [as N] | cumulative total | report only (lb/yr) | all year | 001 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 4.6 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 14 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 19 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 58 lb/d | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | maximum monthly average | ≤ 1 mg/L | all year | 001 |
| Phosphorus, total [as P] | maximum weekly average | ≤ 1.5 mg/L | all year | 001 |
| Phosphorus, total [as P] | maximum monthly average | ≤ 4.2 lb/d | all year | 001 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | Jan, Feb, Mar, Dec | 001 |
| Phosphorus, total [as P] | cumulative total | report only (lb/yr) | all year | 001 |
| Phosphorus, total [as P] | maximum weekly average | ≤ 6.3 lb/d | all year | 001 |
| Phosphorus, total [as P] | annual maximum | report only (lb/yr) | Jan, Feb, Mar, Dec | 001 |
| Phosphorus, total [as P] | cumulative total | report only (lb/yr) | Jan, Feb, Mar, Dec | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| E. coli | maximum monthly geometric mean | ≤ 126 MPN/100mL | all year | 001 |
| Phosphorous, in total orthophosphate | monthly average | report only (mg/L) | all year | 001 |
| Flow, total | total | report only (Mgal/mo) | Jan, Feb, Mar, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 70 mg/L | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 8.5 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 90 mg/L | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | Mar–Nov | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Mar–Nov | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Mar–Nov | 002 |
| Flow, in conduit or thru treatment plant | annual average | ≤ .5 MGD | Mar–Nov | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Coliform, fecal general | maximum monthly geometric mean | ≤ 200 MPN/100mL | all year | 002 |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| pH | average | report only (SU) | all year | MWS |
| Nitrogen, total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrite total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrate total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, nitrate total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, nitrate total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, nitrate total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, nitrate total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, nitrate total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, nitrate total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, nitrate total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, nitrate total [as N] | average | ≤ 10 mg/L | all year | MWS |
| Nitrogen, nitrate total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrate total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrate total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrate total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, nitrate total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Nitrogen, Kjeldahl, total [as N] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Phosphate, total [as PO4] | average | report only (mg/L) | all year | MWS |
| Chloride [as Cl] | average | ≤ 250 mg/L | all year | MWS |
| Chloride [as Cl] | average | ≤ 250 mg/L | all year | MWS |
| Chloride [as Cl] | average | ≤ 250 mg/L | all year | MWS |
| Chloride [as Cl] | average | ≤ 250 mg/L | all year | MWS |
| Chloride [as Cl] | average | ≤ 250 mg/L | all year | MWS |
| Chloride [as Cl] | average | ≤ 250 mg/L | all year | MWS |
| Chloride [as Cl] | average | ≤ 250 mg/L | all year | MWS |
| Chloride [as Cl] | average | ≤ 250 mg/L | all year | MWS |
| Chloride [as Cl] | average | ≤ 250 mg/L | all year | MWS |
| Chloride [as Cl] | average | report only (mg/L) | all year | MWS |
| Chloride [as Cl] | average | report only (mg/L) | all year | MWS |
| Chloride [as Cl] | average | report only (mg/L) | all year | MWS |
| Chloride [as Cl] | average | report only (mg/L) | all year | MWS |
| Chloride [as Cl] | average | report only (mg/L) | all year | MWS |
| Solids, total dissolved | average | ≤ 500 mg/L | all year | MWS |
| Solids, total dissolved | average | ≤ 500 mg/L | all year | MWS |
| Solids, total dissolved | average | ≤ 500 mg/L | all year | MWS |
| Solids, total dissolved | average | ≤ 500 mg/L | all year | MWS |
| Solids, total dissolved | average | ≤ 500 mg/L | all year | MWS |
| Solids, total dissolved | average | ≤ 500 mg/L | all year | MWS |
| Solids, total dissolved | average | ≤ 500 mg/L | all year | MWS |
| Solids, total dissolved | average | ≤ 500 mg/L | all year | MWS |
| Solids, total dissolved | average | ≤ 500 mg/L | all year | MWS |
| Solids, total dissolved | average | report only (mg/L) | all year | MWS |
| Solids, total dissolved | average | report only (mg/L) | all year | MWS |
| Solids, total dissolved | average | report only (mg/L) | all year | MWS |
| Solids, total dissolved | average | report only (mg/L) | all year | MWS |
| Solids, total dissolved | average | report only (mg/L) | all year | MWS |
| Coliform, fecal general | average | ≤ 0 MPN/100mL | all year | MWS |
| Coliform, fecal general | average | ≤ 0 MPN/100mL | all year | MWS |
| Coliform, fecal general | average | ≤ 0 MPN/100mL | all year | MWS |
| Coliform, fecal general | average | ≤ 0 MPN/100mL | all year | MWS |
| Coliform, fecal general | average | ≤ 0 MPN/100mL | all year | MWS |
| Coliform, fecal general | average | ≤ 0 MPN/100mL | all year | MWS |
| Coliform, fecal general | average | ≤ 0 MPN/100mL | all year | MWS |
| Coliform, fecal general | average | ≤ 0 MPN/100mL | all year | MWS |
| Coliform, fecal general | average | ≤ 0 MPN/100mL | all year | MWS |
| Coliform, fecal general | average | report only (MPN/100mL) | all year | MWS |
| Coliform, fecal general | average | report only (MPN/100mL) | all year | MWS |
| Coliform, fecal general | average | report only (MPN/100mL) | all year | MWS |
| Coliform, fecal general | average | report only (MPN/100mL) | all year | MWS |
| Coliform, fecal general | average | report only (MPN/100mL) | all year | MWS |
Cited limits by parameter: Maryland's rules and the federal ones.
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