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Sewage treatment plant, major discharger, Muscle Shoals, Alabama. NPDES permit AL0024180, in force until Jan 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 8.5 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 1000 lb/d | all year | 002 |
| Solids, total suspended | weekly average | ≤ 1500 lb/d | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 002 |
| Solids, total suspended | weekly average | report only (lb/d) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Jan, Feb, Mar, Apr, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.3 mg/L | May–Nov | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 3 mg/L | Jan, Feb, Mar, Apr, Dec | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 1.9 mg/L | May–Nov | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 66.7 lb/d | Jan, Feb, Mar, Apr, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 43.3 lb/d | May–Nov | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 100 lb/d | Jan, Feb, Mar, Apr, Dec | 002 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 65 lb/d | May–Nov | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | weekly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | weekly average | report only (lb/d) | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | weekly average | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 002 |
| Nitrite + Nitrate total [as N] | weekly average | report only (lb/d) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 002 |
| Phosphorus, total [as P] | weekly average | report only (lb/d) | all year | 002 |
| Zinc, total recoverable | monthly average | ≤ 355 ug/L | all year | 002 |
| Zinc, total recoverable | daily maximum | ≤ 355 ug/L | all year | 002 |
| Copper, total recoverable | monthly average | ≤ 23 ug/L | all year | 002 |
| Copper, total recoverable | daily maximum | ≤ 34.6 ug/L | all year | 002 |
| Arsenic, trivalent dissolved | monthly average | report only (ug/L) | all year | 002 |
| Arsenic, trivalent dissolved | daily maximum | report only (ug/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | monthly average | ≤ .011 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 002 |
| E. coli | monthly average | ≤ 548 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| E. coli | monthly average | ≤ 126 #/100mL | May–Oct | 002 |
| E. coli | daily maximum | ≤ 2507 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| E. coli | daily maximum | ≤ 298 #/100mL | May–Oct | 002 |
| Cyanide, free available | monthly average | report only (ug/L) | all year | 002 |
| Cyanide, free available | daily maximum | report only (ug/L) | all year | 002 |
| Toxicity [acute], Ceriodaphnia dubia | single sample | ≤ 0 pass=0;fail=1 | Sep | 002 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | single sample | ≤ 0 pass=0;fail=1 | Sep | 002 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 11 mg/L | May–Nov | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | Jan, Feb, Mar, Apr, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 16.5 mg/L | May–Nov | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 22.5 mg/L | Jan, Feb, Mar, Apr, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 366 lb/d | May–Nov | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 500 lb/d | Jan, Feb, Mar, Apr, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 550 lb/d | May–Nov | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 750 lb/d | Jan, Feb, Mar, Apr, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (mg/L) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (lb/d) | all year | 002 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 003 |
| 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 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| E. coli | daily maximum | report only (#/100mL) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 003 |
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/AL0024180 · MCP: https://passage-data.com/mcp