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Marinas, Chestertown, Maryland. NPDES permit MD0024945 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit once (last August 2026), 122 required values missing, 13 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| August 2026 | Enterococci, maximum | 2419.6 MPN/100mL | ≤ 35 MPN/100mL | 6813% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Streamflow | daily minimum | > .1 cfs | all year |
| Streamflow | daily maximum | < 1.25 cfs | all year |
| Turbidity | maximum monthly average | ≤ 50 NTU | all year |
| Turbidity | maximum weekly average | ≤ 75 NTU | all year |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 3.5 lb/d | all year |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 3.5 lb/d | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 5.3 lb/d | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 5.3 lb/d | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 8.5 SU | all year |
| pH | maximum | ≤ 8.5 SU | all year |
| Solids, total suspended | maximum monthly average | ≤ 90 mg/L | all year |
| Solids, total suspended | maximum monthly average | ≤ 90 mg/L | all year |
| Solids, total suspended | maximum monthly average | ≤ 11 lb/d | all year |
| Solids, total suspended | maximum monthly average | ≤ 11 lb/d | all year |
| Nitrogen, total [as N] | maximum monthly average | ≤ 30 mg/L | May–Oct |
| Nitrogen, total [as N] | maximum monthly average | ≤ 30 mg/L | May–Oct |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | maximum weekly average | ≤ 45 mg/L | May–Oct |
| Nitrogen, total [as N] | maximum weekly average | ≤ 45 mg/L | May–Oct |
| Nitrogen, total [as N] | maximum monthly average | ≤ 3.5 lb/d | May–Oct |
| Nitrogen, total [as N] | maximum monthly average | ≤ 3.5 lb/d | May–Oct |
| Nitrogen, total [as N] | maximum weekly average | ≤ 5.3 lb/d | May–Oct |
| Nitrogen, total [as N] | cumulative total | ≤ 1280 lb/yr | all year |
| Nitrogen, total [as N] | maximum weekly average | ≤ 5.3 lb/d | May–Oct |
| Nitrogen, total [as N] | cumulative total | ≤ 1280 lb/yr | all year |
| Nitrogen, total [as N] | maximum monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | maximum monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | maximum weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | maximum weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | maximum monthly average | ≤ 3.5 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, total [as N] | maximum weekly average | ≤ 5.3 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .76 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.9 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 6.4 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 5.7 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 10 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 25 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 24 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .09 lb/d | May–Oct |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .32 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .34 lb/d | May–Oct |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .75 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ .67 lb/d | May–Oct |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 1.2 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 2.9 lb/d | May–Oct |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 2.8 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Phosphorus, total [as P] | maximum monthly average | ≤ 8 mg/L | May–Oct |
| Phosphorus, total [as P] | maximum monthly average | ≤ 8 mg/L | May–Oct |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | maximum weekly average | ≤ 12 mg/L | May–Oct |
| Phosphorus, total [as P] | maximum weekly average | ≤ 12 mg/L | May–Oct |
| Phosphorus, total [as P] | maximum monthly average | ≤ .9 lb/d | May–Oct |
| Phosphorus, total [as P] | maximum monthly average | ≤ .9 lb/d | May–Oct |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year |
| Phosphorus, total [as P] | cumulative total | ≤ 340 lb/yr | all year |
| Phosphorus, total [as P] | maximum weekly average | ≤ 1.4 lb/d | May–Oct |
| Phosphorus, total [as P] | cumulative total | ≤ 340 lb/yr | all year |
| Phosphorus, total [as P] | maximum weekly average | ≤ 1.4 lb/d | May–Oct |
| Phosphorus, total [as P] | maximum monthly average | ≤ 8 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Phosphorus, total [as P] | maximum monthly average | ≤ 8 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Phosphorus, total [as P] | maximum weekly average | ≤ 12 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Phosphorus, total [as P] | maximum weekly average | ≤ 12 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| 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 |
| 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 |
| E. coli | maximum monthly geometric mean | ≤ 126 MPN/100mL | all year |
| Enterococci | maximum | ≤ 35 MPN/100mL | all year |
| Flow, total | total | report only (Mgal/mo) | 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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