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Sewage treatment plant, major discharger, Avon, Indiana. NPDES permit IN0057614, in force until Aug 31, 2029. Last 12 months: no values over a limit, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily average minimum | ≥ 6 mg/L | May–Nov |
| Oxygen, dissolved [DO] | daily average minimum | ≥ 5 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 | Jan, Feb, Mar, Apr, Dec |
| Solids, total suspended | monthly average | ≤ 13 mg/L | May–Nov |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Dec |
| Solids, total suspended | maximum weekly average | ≤ 20 mg/L | May–Nov |
| Solids, total suspended | monthly average | ≤ 750 lb/d | Jan, Feb, Mar, Apr, Dec |
| Solids, total suspended | monthly average | ≤ 330 lb/d | May–Nov |
| Solids, total suspended | maximum weekly average | ≤ 1100 lb/d | Jan, Feb, Mar, Apr, Dec |
| Solids, total suspended | maximum weekly average | ≤ 500 lb/d | May–Nov |
| 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 | ≤ 1.5 mg/L | May–Nov |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3 mg/L | Jan, Feb, Mar, Apr, Dec |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 2.3 mg/L | May–Nov |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 4.5 mg/L | Jan, Feb, Mar, Apr, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 38 lb/d | May–Nov |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 75 lb/d | Jan, Feb, Mar, Apr, Dec |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 58 lb/d | May–Nov |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 110 lb/d | Jan, Feb, Mar, Apr, Dec |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year |
| 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 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 11 mg/L | May–Nov |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, Dec |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 17 mg/L | May–Nov |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 630 lb/d | Jan, Feb, Mar, Apr, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 280 lb/d | May–Nov |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 1000 lb/d | Jan, Feb, Mar, Apr, Dec |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 430 lb/d | May–Nov |
| Flow, total | monthly total | report only (Mgal/mo) | all year |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Toxicity [acute], Ceriodaphnia dubia, daily maximum | 1 tox acute | new | — | — |
| Toxicity [acute], Pimephales promelas [Fathead Minnow], daily maximum | 1 tox acute | new | — | — |
| Toxicity [chronic], Ceriodaphnia dubia, daily maximum | 1 tox chronic | new | — | — |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow], daily maximum | 1 tox chronic | new | — | — |
Cited limits by parameter: Indiana'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/IN0057614 · MCP: https://passage-data.com/mcp