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Sewage treatment plant, major discharger, Mobile, Alabama. NPDES permit AL0023094 expired Nov 30, 2018; its limits still apply. Last 12 months: over a limit 2 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| February 2026 | pH, daily minimum | 5.5 | ≥ 6 SU |
| March 2026 | pH, daily minimum | 5.7 | ≥ 6 SU |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 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 | ≤ 3202 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 4803 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 | ≤ .22 mg/L | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .18 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ .33 mg/L | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ .27 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 23.4 lb/d | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 19.2 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 35.2 lb/d | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 28.8 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | weekly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | weekly average | report only (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 |
| Copper, total recoverable | daily maximum | ≤ 6.51 ug/L | all year | 001 |
| Enterococci: group D, MF trans, M-E, EIA | monthly average | report only (#/100mL) | all year | 001 |
| Enterococci: group D, MF trans, M-E, EIA | daily maximum | ≤ 500 #/100mL | 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 | ≤ .015 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .026 mg/L | 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 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1.75 mg/L | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1.4 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 2.62 mg/L | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 2.1 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 186 lb/d | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 149 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 280 lb/d | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 224 lb/d | Jan, Feb, Mar, Apr, Dec | 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 48Hr Acute Cyprinodon variegatus | single sample | ≤ 0 pass=0;fail=1 | Mar, Jun, Sep, Dec | 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 |
| Enterococci: group D, MF trans, M-E, EIA | daily maximum | report only (#/100mL) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 002 |
| pH | daily minimum | report only (SU) | all year | 003 |
| pH | daily maximum | report only (SU) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Enterococci: group D, MF trans, M-E, EIA | daily maximum | report only (#/100mL) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 003 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Jan, Feb, Mar, Apr, Dec | 004 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 3 mg/L | May–Nov | 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 | ≤ 3202 lb/d | all year | 004 |
| Solids, total suspended | weekly average | ≤ 4803 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 | ≤ 2135 lb/d | all year | 004 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 3202 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 |
| Enterococci: group D, MF trans, M-E, EIA | monthly average | report only (#/100mL) | all year | 004 |
| Enterococci: group D, MF trans, M-E, EIA | daily maximum | ≤ 275 #/100mL | 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 | ≤ 1 mg/L | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ 1 mg/L | 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 |
| 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 | ≤ 2668 lb/d | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 4003 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 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | single sample | ≤ 0 pass=0;fail=1 | Mar, Jun, Sep, Dec | 004 |
| Pass/Fail Static 48Hr Acute Cyprinodon variegatus | single sample | ≤ 0 pass=0;fail=1 | Mar, Jun, Sep, Dec | 004 |
Cited limits by parameter: Alabama's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/AL0023094 · MCP: https://passage-data.com/mcp