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Sewage treatment plant, Waveland, Mississippi. NPDES permit MS0058718, in force until Aug 31, 2027. Last 12 months: over a limit 6 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| December 2025 | 001 | Oxygen, dissolved [DO], minimum | 2.4 mg/L | ≥ 6 mg/L | 60% |
| December 2025 | 002 | Oxygen, dissolved [DO], minimum | 2.4 mg/L | ≥ 6 mg/L | 60% |
| March 2026 | 001 | Oxygen, dissolved [DO], minimum | 1.2 mg/L | ≥ 6 mg/L | 80% |
| March 2026 | 002 | Oxygen, dissolved [DO], minimum | 1.2 mg/L | ≥ 6 mg/L | 80% |
| June 2026 | 001 | Oxygen, dissolved [DO], minimum | 5.7 mg/L | ≥ 6 mg/L | 5% |
| June 2026 | 002 | Oxygen, dissolved [DO], minimum | 5.7 mg/L | ≥ 6 mg/L | 5% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | minimum | ≥ 6 mg/L | all year | 001 |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) | all year | 001 |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | quarterly average | ≤ 10 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | quarterly maximum | ≤ 15 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | quarterly average | ≤ 17 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | quarterly maximum | ≤ 25 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | quarterly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | quarterly maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | quarterly average | report only (lb/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | quarterly maximum | report only (lb/d) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | quarterly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | quarterly maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | quarterly average | ≤ 50 lb/d | all year | 001 |
| Solids, total suspended | quarterly maximum | ≤ 75 lb/d | all year | 001 |
| Solids, total suspended | quarterly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | quarterly maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | quarterly average | report only (lb/d) | all year | 001 |
| Solids, total suspended | quarterly maximum | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ 2 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | quarterly maximum | ≤ 3 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ 3.3 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | quarterly maximum | ≤ 5 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | quarterly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | quarterly maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | quarterly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | quarterly maximum | report only (lb/d) | all year | 001 |
| Enterococci: group D, MF trans, M-E, EIA | maximum monthly average | ≤ 35 #/100mL | all year | 001 |
| Enterococci: group D, MF trans, M-E, EIA | maximum weekly average | ≤ 130 #/100mL | all year | 001 |
| Flow, in conduit or thru treatment plant | quarterly average | ≤ .2 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | quarterly maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | quarterly average | ≤ .052 mg/L | all year | 001 |
| Chlorine, total residual | quarterly maximum | ≤ .09 mg/L | all year | 001 |
| E. coli | quarterly average | ≤ 126 #/100mL | all year | 001 |
| E. coli | quarterly maximum | ≤ 410 #/100mL | all year | 001 |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year | 001 |
| Sludge settleability 30 minute | minimum | report only (mL/L) | all year | 001 |
| Sludge settleability 30 minute | maximum | report only (mL/L) | all year | 001 |
| Oxygen, dissolved [DO] | minimum | ≥ 6 mg/L | all year | 002 |
| Oxygen, dissolved [DO] | minimum | report only (mg/L) | all year | 002 |
| Oxygen, dissolved [DO] | maximum | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | quarterly average | ≤ 10 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | quarterly maximum | ≤ 15 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | quarterly average | ≤ 17 lb/d | all year | 002 |
| BOD, 5-day, 20 deg. C | quarterly maximum | ≤ 26 lb/d | all year | 002 |
| BOD, 5-day, 20 deg. C | quarterly average | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | quarterly maximum | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | quarterly average | report only (lb/d) | all year | 002 |
| BOD, 5-day, 20 deg. C | quarterly maximum | report only (lb/d) | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | quarterly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | quarterly maximum | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | quarterly average | ≤ 50 lb/d | all year | 002 |
| Solids, total suspended | quarterly maximum | ≤ 75 lb/d | all year | 002 |
| Solids, total suspended | quarterly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | quarterly maximum | report only (mg/L) | all year | 002 |
| Solids, total suspended | quarterly average | report only (lb/d) | all year | 002 |
| Solids, total suspended | quarterly maximum | report only (lb/d) | all year | 002 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ 2 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | quarterly maximum | ≤ 3 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ 3.3 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | quarterly maximum | ≤ 5 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | quarterly average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | quarterly maximum | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | quarterly average | report only (lb/d) | all year | 002 |
| Nitrogen, ammonia total [as N] | quarterly maximum | report only (lb/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | quarterly average | ≤ .2 MGD | all year | 002 |
| Flow, in conduit or thru treatment plant | quarterly maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | quarterly average | report only (mg/L) | all year | 002 |
| Chlorine, total residual | quarterly maximum | ≤ 1 mg/L | all year | 002 |
| E. coli | quarterly average | ≤ 126 #/100mL | all year | 002 |
| E. coli | quarterly maximum | ≤ 410 #/100mL | all year | 002 |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | all year | 002 |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year | 002 |
| Sludge settleability 30 minute | minimum | report only (mL/L) | all year | 002 |
| Sludge settleability 30 minute | maximum | report only (mL/L) | all year | 002 |
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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