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Sewage treatment plant, Brownstown, Indiana. NPDES permit IN0022454, in force until Jul 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily average minimum | ≥ 2 mg/L | all year |
| 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 | ≤ 168 lb/d | all year |
| Solids, total suspended | maximum weekly average | ≤ 252 lb/d | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10.2 mg/L | all year |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 15.3 mg/L | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 57 lb/d | all year |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 85.5 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 | all year |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 40 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 140 lb/d | all year |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 224 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
Your permit document is the final word. As JSON: /api/v1/permits/IN0022454 · MCP: https://passage-data.com/mcp