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Sewage treatment plant, major discharger, Bayou La Batre, Alabama. NPDES permit AL0078921, in force until Sep 30, 2028. Last 12 months: over a limit once (last October 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Arsenic, trivalent dissolved, monthly average | 7.1 | ≤ 5.22 ug/L | 36% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 2 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 8.5 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 750 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 1125 lb/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 001 |
| Solids, total suspended | weekly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 15 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 250 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 375 lb/d | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | ≤ 20 mg/L | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | weekly average | ≤ 30 mg/L | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | ≤ 500 lb/d | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | weekly average | ≤ 750 lb/d | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | weekly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrite + Nitrate total [as N] | weekly average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | weekly 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] | weekly average | report only (lb/d) | all year | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | = 119 ug/L | all year | 001 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Copper, total recoverable | daily maximum | = 6.36 ug/L | all year | 001 |
| Arsenic, trivalent dissolved | monthly average | ≤ 3.65 ug/L | all year | 001 |
| Arsenic, trivalent dissolved | daily maximum | ≤ 91.5 ug/L | 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 | monthly average | report only (mg/L) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .017 mg/L | all year | 001 |
| Enterococci | monthly average | ≤ 35 #/100mL | all year | 001 |
| Enterococci | daily maximum | ≤ 104 #/100mL | all year | 001 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Coliform, fecal general | monthly average | ≤ 14 #/100mL | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 37.5 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 625 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 938 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (lb/d) | all year | 001 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Pass/Fail Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | single sample | ≤ 0 pass=0;fail=1 | Aug | 001 |
| Pass/Fail Static Renewal 7Day Chronic Cyprinodon variegatus | single sample | ≤ 0 pass=0;fail=1 | Aug | 001 |
| pH | daily minimum | report only (SU) | all year | 002 |
| pH | daily maximum | report only (SU) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Enterococci | daily maximum | report only (#/100mL) | all year | 002 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 002 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 004 |
| pH | daily minimum | ≥ 6 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 004 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 004 |
| Solids, total suspended | monthly average | ≤ 750 lb/d | all year | 004 |
| Solids, total suspended | weekly average | ≤ 1125 lb/d | all year | 004 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 004 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 004 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 004 |
| Solids, total suspended | weekly average | report only (lb/d) | all year | 004 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 20 mg/L | all year | 004 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 30 mg/L | all year | 004 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 500 lb/d | all year | 004 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 750 lb/d | all year | 004 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 004 |
| Nitrogen, Kjeldahl, total [as N] | weekly average | report only (mg/L) | all year | 004 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 004 |
| Nitrogen, Kjeldahl, total [as N] | weekly average | report only (lb/d) | all year | 004 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 004 |
| Nitrite + Nitrate total [as N] | weekly average | report only (mg/L) | all year | 004 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 004 |
| Nitrite + Nitrate total [as N] | weekly average | report only (lb/d) | all year | 004 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 004 |
| Phosphorus, total [as P] | weekly average | report only (lb/d) | all year | 004 |
| Thallium, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Thallium, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Copper, total recoverable | daily maximum | = 19.9 ug/L | all year | 004 |
| Arsenic, trivalent dissolved | monthly average | ≤ 5.22 ug/L | all year | 004 |
| Arsenic, trivalent dissolved | daily maximum | ≤ 286 ug/L | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Chlorine, total residual | monthly average | report only (mg/L) | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ .053 mg/L | all year | 004 |
| Enterococci | monthly average | ≤ 35 #/100mL | all year | 004 |
| Enterococci | daily maximum | ≤ 104 #/100mL | all year | 004 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Coliform, fecal general | monthly average | ≤ 14 #/100mL | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 37.5 mg/L | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 625 lb/d | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 938 lb/d | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (mg/L) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (lb/d) | all year | 004 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | 004 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 004 |
| Pass/Fail Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | single sample | ≤ 0 pass=0;fail=1 | Aug | 004 |
| Pass/Fail Static Renewal 7Day Chronic Cyprinodon variegatus | single sample | ≤ 0 pass=0;fail=1 | Aug | 004 |
Cited limits by parameter: Alabama's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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