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Correctional Institutions, Church Hill, Maryland. NPDES permit MD0023876 expired Aug 31, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 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 | ≤ 5 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 7.5 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 | ≤ 5 lb/d | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 7.5 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 4.9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.6 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 23.9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 16.2 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .8 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .4 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 4 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 2.7 lb/d | May–Oct | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 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 |
| 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 |
| Chlorine, total residual | daily maximum | < .1 mg/L | all year | 001 |
| E. coli | maximum monthly geometric mean | ≤ 126 MPN/100mL | all year | 001 |
| Flow, total | total | report only (Mgal/mo) | all year | 001 |
| Discharge event observation [Visual Monitoring] | per discharge | report only (occur/d) | all year | 001 |
| Conductivity | monthly average | report only (uS/cm) | all year | 002 |
| Conductivity | monthly average | report only (uS/cm) | all year | 002 |
| Oxygen, dissolved [DO] | minimum | ≥ 5 mg/L | all year | 002 |
| Oxygen, dissolved [DO] | minimum | ≥ 5 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 23 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 23 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 15 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 15 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 7.5 lb/d | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 7.5 lb/d | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 5 lb/d | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 5 lb/d | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 8.5 SU | all year | 002 |
| pH | maximum | ≤ 8.5 SU | all year | 002 |
| Solids, total suspended | maximum weekly average | ≤ 23 mg/L | all year | 002 |
| Solids, total suspended | maximum weekly average | ≤ 23 mg/L | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 15 mg/L | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 15 mg/L | all year | 002 |
| Solids, total suspended | maximum weekly average | ≤ 7.5 lb/d | all year | 002 |
| Solids, total suspended | maximum weekly average | ≤ 7.5 lb/d | all year | 002 |
| Solids, total suspended | annual maximum | ≤ 1825 lb/yr | all year | 002 |
| Solids, total suspended | annual maximum | ≤ 1825 lb/yr | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 5 lb/d | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 5 lb/d | all year | 002 |
| Solids, total suspended | monthly total | report only (lb/mo) | 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 average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | annual maximum | ≤ 1045 lb/yr | all year | 002 |
| Nitrogen, total [as N] | annual maximum | ≤ 1045 lb/yr | all year | 002 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 002 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 002 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | 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 | ≤ 2.2 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.2 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 | ≤ 4.9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 16.2 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 16.2 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 20.3 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 20.3 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 5.4 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 5.4 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 6.8 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 6.8 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .7 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .7 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.6 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.6 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [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 |
| 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] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | annual maximum | ≤ 174 lb/yr | all year | 002 |
| Phosphorus, total [as P] | annual maximum | ≤ 174 lb/yr | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 002 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 002 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 002 |
| Arsenic, total recoverable | maximum | report only (mg/L) | all year | 002 |
| Arsenic, total recoverable | maximum | report only (mg/L) | all year | 002 |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| E. coli | maximum | ≤ 63 MPN/100mL | all year | 002 |
| E. coli | maximum | ≤ 63 MPN/100mL | all year | 002 |
| Solids, total dissolved | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Solids, total dissolved | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | 002 |
| Flow, total | monthly total | report only (gal/mo) | all year | 002 |
| Flow, total | monthly total | report only (gal/mo) | all year | 002 |
Cited limits by parameter: Maryland's rules and the federal ones.
Same industry: the 6 Justice, Public Order and Safety permits in Maryland.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MD0023876 · MCP: https://passage-data.com/mcp