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Sewage treatment plant, major discharger, Gary, Indiana. NPDES permit IN0022977, in force until Jun 30, 2027. Last 12 months: over a limit 11 times (last June 2026), 3 required values missing, 61 of 149 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Solids, total suspended, monthly average | 28.1 mg/L | ≤ 9.6 mg/L | 193% |
| March 2026 | Solids, total suspended, maximum weekly average | 25507 lb/d | ≤ 14420 lb/d | 77% |
| March 2026 | Solids, total suspended, maximum weekly average | 98.2 mg/L | ≤ 14.4 mg/L | 582% |
| April 2026 | Nitrogen, ammonia total [as N], daily maximum | 2.8 mg/L | ≤ 2.63 mg/L | 6% |
| April 2026 | Solids, total suspended, maximum weekly average | 15.9 mg/L | ≤ 14.4 mg/L | 10% |
| May 2026 | Solids, total suspended, monthly average | 6.8 mg/L | ≤ 6 mg/L | 13% |
| May 2026 | Solids, total suspended, maximum weekly average | 11.7 mg/L | ≤ 9 mg/L | 30% |
| June 2026 | Solids, total suspended, monthly average | 6215 lb/d | ≤ 6008 lb/d | 3% |
| June 2026 | Solids, total suspended, monthly average | 7.6 mg/L | ≤ 6 mg/L | 27% |
| June 2026 | Solids, total suspended, maximum weekly average | 18959 lb/d | ≤ 9013 lb/d | 110% |
| June 2026 | Solids, total suspended, maximum weekly average | 20.6 mg/L | ≤ 9 mg/L | 129% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily average minimum | ≥ 6 mg/L | May–Nov | 001 |
| Oxygen, dissolved [DO] | daily average minimum | ≥ 5 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 9.6 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 6 mg/L | May–Nov | 001 |
| Solids, total suspended | maximum weekly average | ≤ 14.4 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| Solids, total suspended | maximum weekly average | ≤ 9 mg/L | May–Nov | 001 |
| Solids, total suspended | monthly average | ≤ 9613 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 6008 lb/d | May–Nov | 001 |
| Solids, total suspended | maximum weekly average | ≤ 14420 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| Solids, total suspended | maximum weekly average | ≤ 9013 lb/d | May–Nov | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.13 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.33 mg/L | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.63 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1001 lb/d | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1132 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2333 lb/d | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2634 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 001 |
| Cyanide, free [as free] | monthly average | report only (mg/L) | all year | 001 |
| Cyanide, free [as free] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, free [as free] | monthly average | report only (lb/d) | all year | 001 |
| Cyanide, free [as free] | daily maximum | report only (lb/d) | all year | 001 |
| Cyanide, free [as free] | monthly average | report only (mg/L) | all year | 001 |
| Cyanide, free [as free] | daily maximum | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Chloride [as Cl] | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Fluoride, total [as F] | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Iron, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Iron, total recoverable | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Iron, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Arsenic, total [as As] | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Nickel, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Nickel, total recoverable | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Nickel, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Zinc, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total recoverable | monthly average | report only (lb/d) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (lb/d) | all year | 001 |
| Zinc, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Cadmium, total recoverable | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Cadmium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Lead, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Lead, total recoverable | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Lead, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Chromium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Chromium, total recoverable | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Chromium, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Copper, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Copper, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total recoverable | monthly average | report only (lb/d) | all year | 001 |
| Copper, total recoverable | daily maximum | report only (lb/d) | all year | 001 |
| Copper, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Copper, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Phenolics, total recoverable | daily maximum | report only (lb/d) | Mar, Jun, Sep, Dec | 001 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | ≤ .008 mg/L | Apr–Oct | 001 |
| Chlorine, total residual | daily maximum | < .06 mg/L | Apr–Oct | 001 |
| Chlorine, total residual | monthly average | ≤ 8 lb/d | Apr–Oct | 001 |
| Chlorine, total residual | daily maximum | < 60.1 lb/d | Apr–Oct | 001 |
| E. coli, colony forming units [CFU] | monthly geometric mean | ≤ 125 CFU/100mL | Apr–Oct | 001 |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 235 CFU/100mL | Apr–Oct | 001 |
| E. coli, colony forming units [CFU] | daily maximum | report only (CFU/100mL) | Apr–Oct | 001 |
| Number of Events | monthly total | report only (# exceed) | Apr–Oct | 001 |
| Number of Events | monthly total | report only (#) | Apr–Oct | 001 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute (alert, not enforceable) | Jun, Dec | 001 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute (alert, not enforceable) | Jan, Jul | 001 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute (alert, not enforceable) | Jan, Jul | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 2 tox chronic (alert, not enforceable) | Jun, Dec | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 2 tox chronic (alert, not enforceable) | Jan, Jul | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 2 tox chronic (alert, not enforceable) | Jan, Jul | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute (alert, not enforceable) | Jun, Dec | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute (alert, not enforceable) | Jan, Jul | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute (alert, not enforceable) | Jan, Jul | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 2 tox chronic (alert, not enforceable) | Jun, Dec | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 2 tox chronic (alert, not enforceable) | Jan, Jul | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 2 tox chronic (alert, not enforceable) | Jan, Jul | 001 |
| Mercury, total recoverable | annual average | ≤ 1.8 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 8.8 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 5 mg/L | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 13.2 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 7.5 mg/L | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 8812 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 5007 lb/d | May–Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 13218 lb/d | Jan, Feb, Mar, Apr, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 7511 lb/d | May–Nov | 001 |
| Phosphorus, total percent removal | monthly average minimum | ≥ 70 % | all year | 001 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 001 |
| 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 | 006 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 006 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 006 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 006 |
| 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 |
| Duration | monthly total | report only (hr/mo) | all year | 008 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 008 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 008 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 008 |
| Duration | monthly total | report only (hr/mo) | all year | 009 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 009 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 009 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 009 |
| Duration | monthly total | report only (hr/mo) | all year | 010 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 010 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 010 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 010 |
| Duration | monthly total | report only (hr/mo) | all year | 011 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 011 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 011 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 011 |
| Duration | monthly total | report only (hr/mo) | all year | 012 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 012 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 012 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 012 |
| Duration | monthly total | report only (hr/mo) | all year | 013 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 013 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 013 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 013 |
| Duration | monthly total | report only (hr/mo) | all year | 015 |
| Overflow volume [SS0 volume, CSO volume] | monthly total | report only (Mgal) | all year | 015 |
| Precipitation, monthly accumulation | monthly total | report only (in/mo) | all year | 015 |
| Discharge event observation [Visual Monitoring] | monthly total | report only (#/mo) | all year | 015 |
Cited limits by parameter: Indiana's rules and the federal ones.
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