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Sewage treatment plant, major discharger, Opelika, Alabama. NPDES permit AL0050130, in force until Mar 31, 2028. Last 12 months: over a limit once (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| April 2026 | Phosphorus, total [as P], monthly average | .28 | ≤ .25 mg/L | 12% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 8.5 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 | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1000 lb/d | all year | 001 |
| Solids, total suspended | monthly average | = 1476 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 1501 lb/d | all year | 001 |
| Solids, total suspended | weekly average | = 2214 lb/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | 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 | weekly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | 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 |
| Solids, total suspended | weekly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 2 mg/L | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 5 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 1.6 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly average | = 3 mg/L | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | weekly average | = 7.5 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 36.6 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 98.4 lb/d | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | = 246 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 55 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly average | = 147 lb/d | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | weekly average | = 369 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] | 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] | 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] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | weekly 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] | 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] | 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] | monthly average | report only (lb/d) | all year | 001 |
| Nitrite + Nitrate total [as N] | weekly 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) | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .25 mg/L | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | = .25 mg/L | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | Apr–Oct | 001 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | Apr–Oct | 001 |
| Phosphorus, total [as P] | weekly average | report only (mg/L) | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | weekly average | report only (lb/d) | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | weekly average | report only (lb/d) | Apr–Oct | 001 |
| Phosphorus, total [as P] | weekly average | report only (lb/d) | Apr–Oct | 001 |
| Phosphorus, total [as P] | weekly average | report only (lb/d) | Jan, Feb, Mar, Nov, Dec | 001 |
| Zinc, total recoverable | monthly average | ≤ 212 ug/L | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ 207 ug/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 212 ug/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 207 ug/L | all year | 001 |
| Copper, total recoverable | monthly average | ≤ 14.2 ug/L | all year | 001 |
| Copper, total recoverable | monthly average | ≤ 13.7 ug/L | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 19.3 ug/L | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 18.9 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 | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | 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 | ≤ .012 mg/L | all year | 001 |
| Chlorine, total residual | monthly average | = .012 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .021 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | = .02 mg/L | all year | 001 |
| E. coli | monthly average | ≤ 548 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| E. coli | monthly average | ≤ 126 #/100mL | May–Oct | 001 |
| E. coli | monthly average | ≤ 126 #/100mL | May–Oct | 001 |
| E. coli | monthly average | ≤ 548 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| E. coli | daily maximum | ≤ 2507 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| E. coli | daily maximum | ≤ 298 #/100mL | May–Oct | 001 |
| E. coli | daily maximum | ≤ 298 #/100mL | May–Oct | 001 |
| E. coli | daily maximum | ≤ 2507 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | ≤ 0 pass=0;fail=1 | Oct | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | ≤ 0 pass=0;fail=1 | Oct | 001 |
| Mercury, total recoverable | monthly average | ≤ .013 ug/L | all year | 001 |
| Mercury, total recoverable | monthly average | = .013 ug/L | all year | 001 |
| Mercury, total recoverable | daily maximum | ≤ 2.58 ug/L | all year | 001 |
| Mercury, total recoverable | daily maximum | = 2.52 ug/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | = 10 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 6 mg/L | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 15 mg/L | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | = 15 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 22.5 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 9 mg/L | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 333 lb/d | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | = 492 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 500 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | = 295 lb/d | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 500 lb/d | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | = 738 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 750 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | = 442 lb/d | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | 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] | 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] | 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, 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 |
| 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 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| pH | daily minimum | report only (SU) | all year | 004 |
| pH | daily maximum | report only (SU) | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| E. coli | daily maximum | report only (#/100mL) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 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/AL0050130 · MCP: https://passage-data.com/mcp