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Sewage treatment plant, major discharger, Pass Christian, Mississippi. NPDES permit MS0043141, in force until May 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | minimum | ≥ 6 mg/L | all year |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) | all year |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 mg/L | May–Oct |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 15 mg/L | May–Oct |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 584 lb/d | May–Oct |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 1168 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 876 lb/d | May–Oct |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 1752 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | report only (lb/d) | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | minimum | report only (SU) | all year |
| pH | maximum | report only (SU) | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 1752 lb/d | all year |
| Solids, total suspended | maximum weekly average | ≤ 2629 lb/d | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | maximum weekly average | report only (mg/L) | all year |
| Solids, total suspended | monthly average | report only (lb/d) | all year |
| Solids, total suspended | maximum weekly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | maximum weekly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | maximum weekly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | maximum weekly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, total [as N] | maximum weekly average | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.6 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 9.7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 9.9 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 14.6 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 385 lb/d | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 566 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 482 lb/d | May–Oct |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 701 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | maximum weekly average | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | maximum weekly average | report only (lb/d) | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | maximum weekly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year |
| Phosphorus, total [as P] | maximum weekly average | report only (lb/d) | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | minimum hourly average | report only (mg/L) | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year |
| Phosphorus, total [as P] | maximum weekly average | report only (lb/d) | all year |
| Silver total recoverable | monthly average | ≤ .0019 mg/L | all year |
| Silver total recoverable | maximum weekly average | ≤ .0019 mg/L | all year |
| Copper, total recoverable | monthly average | ≤ .0031 mg/L | all year |
| Copper, total recoverable | maximum weekly average | ≤ .0048 mg/L | all year |
| Enterococci: group D, MF trans, M-E, EIA | monthly average | ≤ 35 #/100mL | all year |
| Enterococci: group D, MF trans, M-E, EIA | maximum weekly average | ≤ 130 #/100mL | all year |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 7 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | monthly average | ≤ .008 mg/L | all year |
| Chlorine, total residual | maximum weekly average | ≤ .012 mg/L | all year |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year |
| Sludge settleability 30 minute | minimum | report only (mL/L) | all year |
| Sludge settleability 30 minute | maximum | report only (mL/L) | all year |
Cited limits by parameter: Mississippi's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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