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Sewage treatment plant, major discharger, Seymour, Indiana. NPDES permit IN0024473, in force until Apr 30, 2031. Last 12 months: over a limit 2 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| February 2026 | Nitrogen, ammonia total [as N], monthly average | 5.998 mg/L | ≤ 5.7 mg/L | 5% |
| February 2026 | Nitrogen, ammonia total [as N], maximum weekly average | 8.84 mg/L | ≤ 8.6 mg/L | 3% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily average minimum | ≥ 4 mg/L | May–Oct |
| Oxygen, dissolved [DO] | daily average minimum | ≥ 3 mg/L | Jan, Feb, Mar, Apr, Dec |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 7511 lb/d | all year |
| Solids, total suspended | maximum weekly average | ≤ 11266 lb/d | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.7 mg/L | all year |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 8.6 mg/L | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1427 lb/d | all year |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 2153 lb/d | all year |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year |
| Cyanide, free [as free] | monthly average | ≤ .022 mg/L | all year |
| Cyanide, free [as free] | daily maximum | ≤ .044 mg/L | all year |
| Cyanide, free [as free] | monthly average | report only (mg/L) | all year |
| Cyanide, free [as free] | daily maximum | report only (mg/L) | all year |
| Nickel, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Nickel, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Nickel, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Nickel, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Lead, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Lead, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Lead, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Lead, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Chromium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Chromium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Chromium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Chromium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Copper, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Copper, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Copper, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Copper, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| E. coli, colony forming units [CFU] | monthly geometric mean | ≤ 125 CFU/100mL | Apr–Oct |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 235 CFU/100mL | Apr–Oct |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | Apr, Oct |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | May, Nov |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | May, Nov |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 4.3 tox chronic | Apr, Oct |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 4.3 tox chronic | May, Nov |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 4.3 tox chronic | May, Nov |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute | Apr, Oct |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute | May, Nov |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute | May, Nov |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 4.3 tox chronic | Apr, Oct |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 4.3 tox chronic | May, Nov |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 4.3 tox chronic | May, Nov |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 40 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 6259 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 10014 lb/d | all year |
| Flow, total | monthly total | report only (Mgal/mo) | all year |
Cited limits by parameter: Indiana's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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