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Sewage treatment plant, major discharger, Sullivan, Indiana. NPDES permit IN0024554, in force until Mar 31, 2031. Last 12 months: over a limit 2 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| November 2025 | pH, daily maximum | 9.7 SU | ≤ 9 SU |
| December 2025 | pH, daily maximum | 9.3 SU | ≤ 9 SU |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Duration | monthly total | report only (hr/mo) | all year | 002 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 002 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 002 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 002 |
| Duration | monthly total | report only (hr/mo) | all year | 003 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 003 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 003 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 003 |
| Duration | monthly total | report only (hr/mo) | all year | 004 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 004 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 004 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 004 |
| Duration | monthly total | report only (hr/mo) | all year | 005 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 005 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 005 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 005 |
| Duration | monthly total | report only (hr/mo) | all year | 007 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 007 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 007 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 007 |
| Oxygen, dissolved [DO] | daily average minimum | ≥ 6 mg/L | May–Nov | 025 |
| Oxygen, dissolved [DO] | daily average minimum | ≥ 5 mg/L | Jan, Feb, Mar, Apr, Dec | 025 |
| pH | daily minimum | ≥ 6 SU | all year | 025 |
| pH | daily maximum | ≤ 9 SU | all year | 025 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Dec | 025 |
| Solids, total suspended | monthly average | ≤ 24 mg/L | May–Nov | 025 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Dec | 025 |
| Solids, total suspended | maximum weekly average | ≤ 36 mg/L | May–Nov | 025 |
| Solids, total suspended | monthly average | ≤ 525.7 lb/d | Jan, Feb, Mar, Apr, Dec | 025 |
| Solids, total suspended | monthly average | ≤ 420.6 lb/d | May–Nov | 025 |
| Solids, total suspended | maximum weekly average | ≤ 788.6 lb/d | Jan, Feb, Mar, Apr, Dec | 025 |
| Solids, total suspended | maximum weekly average | ≤ 630.9 lb/d | May–Nov | 025 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 025 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 025 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.6 mg/L | May–Nov | 025 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.1 mg/L | Jan, Feb, Mar, Apr, Dec | 025 |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 2.4 mg/L | May–Nov | 025 |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 4.7 mg/L | Jan, Feb, Mar, Apr, Dec | 025 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 28 lb/d | May–Nov | 025 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 54.3 lb/d | Jan, Feb, Mar, Apr, Dec | 025 |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 42.1 lb/d | May–Nov | 025 |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 82.4 lb/d | Jan, Feb, Mar, Apr, Dec | 025 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 025 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 025 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 025 |
| E. coli, colony forming units [CFU] | monthly geometric mean | ≤ 125 CFU/100mL | Apr–Oct | 025 |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 235 CFU/100mL | Apr–Oct | 025 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute (alert, not enforceable) | Mar | 025 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | Apr | 025 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | Apr | 025 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 1 tox chronic (alert, not enforceable) | Mar | 025 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 1 tox chronic | Apr | 025 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 1 tox chronic | Apr | 025 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute | Mar | 025 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute | Apr | 025 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute | Apr | 025 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox chronic (alert, not enforceable) | Mar | 025 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox chronic | Apr | 025 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox chronic | Apr | 025 |
| Cyanide, total recoverable | monthly average | report only (mg/L) | all year | 025 |
| Cyanide, total recoverable | daily maximum | report only (mg/L) | all year | 025 |
| Cyanide, total recoverable | monthly average | report only (mg/L) | all year | 025 |
| Cyanide, total recoverable | daily maximum | report only (mg/L) | all year | 025 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Dec | 025 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 20 mg/L | May–Nov | 025 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, Dec | 025 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 30 mg/L | May–Nov | 025 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 438.1 lb/d | Jan, Feb, Mar, Apr, Dec | 025 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 350.5 lb/d | May–Nov | 025 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 701 lb/d | Jan, Feb, Mar, Apr, Dec | 025 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 525.7 lb/d | May–Nov | 025 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 025 |
| Copper, dry weight | value | report only (mg/kg) | Jun, Dec | PRT |
| Copper, dry weight | value | report only (mg/kg) | Jun, Dec | PRT |
| Cadmium, dry weight | value | report only (mg/kg) | Jun, Dec | PRT |
| Cadmium, dry weight | value | report only (mg/kg) | Jun, Dec | PRT |
| Molybdenum, sludge, total, dry weight [as Mo] | value | report only (mg/kg) | Jun, Dec | PRT |
| Molybdenum, sludge, total, dry weight [as Mo] | value | report only (mg/kg) | Jun, Dec | PRT |
| Zinc, sludge, total, dry weight [as Zn] | value | report only (mg/kg) | Jun, Dec | PRT |
| Zinc, sludge, total, dry weight [as Zn] | value | report only (mg/kg) | Jun, Dec | PRT |
| Lead, sludge, total, dry weight [as Pb] | value | report only (mg/kg) | Jun, Dec | PRT |
| Lead, sludge, total, dry weight [as Pb] | value | report only (mg/kg) | Jun, Dec | PRT |
| Nickel, sludge, total, dry weight [as Ni] | value | report only (mg/kg) | Jun, Dec | PRT |
| Nickel, sludge, total, dry weight [as Ni] | value | report only (mg/kg) | Jun, Dec | PRT |
| Mercury, sludge, total, dry weight [as Hg] | value | report only (mg/kg) | Jun, Dec | PRT |
| Mercury, sludge, total, dry weight [as Hg] | value | report only (mg/kg) | Jun, Dec | PRT |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Cyanide, total recoverable, daily maximum | 0.009 mg/L | new | 0.0067 mg/L (5 values, 3 below detection) | — |
| Cyanide, total recoverable, monthly average | 0.004 mg/L | new | 0.003 mg/L (5 values, 3 below detection) | — |
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/IN0024554 · MCP: https://passage-data.com/mcp