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Blast Furnaces And Steel Mills, major discharger, East Chicago, Indiana. NPDES permit IN0000094, in force until Jan 31, 2029. Last 12 months: over a limit 8 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 018 | pH, daily maximum | 11.3 SU | ≤ 9.5 SU | — |
| December 2025 | 018 | pH, daily maximum | 11.5 SU | ≤ 9.5 SU | — |
| January 2026 | 014 | Oil and grease, hexane extr method, daily maximum | 24.7 mg/L | ≤ 15 mg/L | 65% |
| January 2026 | 014 | Oil and grease, hexane extr method, monthly average | 14.4 mg/L | ≤ 10 mg/L | 44% |
| August 2026 | 018 | Cyanide, free [as free], daily maximum | 45 ug/L | ≤ 44 ug/L | 2% |
| August 2026 | 018 | Cyanide, free [as free], daily maximum | 7.8 lb/d | ≤ 7.3 lb/d | 7% |
| August 2026 | 018 | Cyanide, free [as free], monthly average | 24 ug/L | ≤ 22 ug/L | 9% |
| August 2026 | 018 | Cyanide, free [as free], monthly average | 4.21 lb/d | ≤ 3.7 lb/d | 14% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Flow rate | maximum hourly average | report only (MGD) | all year | 000 |
| Flow rate | daily maximum | report only (MGD) | all year | 000 |
| Flow rate | maximum hourly average | report only (MGD) | all year | 000 |
| Flow rate | daily maximum | report only (MGD) | all year | 000 |
| Surface area, square feet | daily maximum | report only (ft2) | all year | 000 |
| Depth to water level ft below landsurface | daily maximum | report only (ft) | all year | 000 |
| Velocity of intake | maximum hourly average | ≤ .5 ft/sec | all year | 000 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 011 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 011 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 011 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 011 |
| pH | daily minimum | ≥ 6 SU | all year | 011 |
| pH | daily maximum | ≤ 9 SU | all year | 011 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 011 |
| Oil and grease, hexane extr method | daily maximum | report only (lb/d) | all year | 011 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| Chlorine, total residual | monthly average | ≤ 14 ug/L | all year | 011 |
| Chlorine, total residual | daily maximum | < 60 ug/L | all year | 011 |
| Chlorine, total residual | monthly average | ≤ .058 lb/d | all year | 011 |
| Chlorine, total residual | daily maximum | < .25 lb/d | all year | 011 |
| Mercury, total recoverable | monthly average | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 011 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 011 |
| Mercury, total recoverable | monthly average | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 011 |
| Mercury, total recoverable | daily maximum | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 011 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 011 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 013 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 013 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 013 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 013 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 013 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 013 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 013 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 013 |
| pH | daily minimum | ≥ 6 SU | all year | 013 |
| pH | daily minimum | ≥ 6 SU | all year | 013 |
| pH | daily maximum | ≤ 9 SU | all year | 013 |
| pH | daily maximum | ≤ 9 SU | all year | 013 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 013 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 013 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 013 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 013 |
| Solids, total suspended | monthly average | ≤ 5770 lb/d | all year | 013 |
| Solids, total suspended | monthly average | ≤ 5294 lb/d | all year | 013 |
| Solids, total suspended | daily maximum | ≤ 14800 lb/d | all year | 013 |
| Solids, total suspended | daily maximum | ≤ 13849 lb/d | all year | 013 |
| Oil and grease, hexane extr method | monthly average | ≤ 10 mg/L | all year | 013 |
| Oil and grease, hexane extr method | monthly average | ≤ 10 mg/L | all year | 013 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 013 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 013 |
| Oil and grease, hexane extr method | monthly average | ≤ 1421 lb/d | all year | 013 |
| Oil and grease, hexane extr method | monthly average | ≤ 1263 lb/d | all year | 013 |
| Oil and grease, hexane extr method | daily maximum | ≤ 4172 lb/d | all year | 013 |
| Oil and grease, hexane extr method | daily maximum | ≤ 3775 lb/d | all year | 013 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 013 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 013 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 013 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 013 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year | 013 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year | 013 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year | 013 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year | 013 |
| Cyanide, free [as free] | monthly average | report only (mg/L) | all year | 013 |
| Cyanide, free [as free] | monthly average | report only (mg/L) | all year | 013 |
| Cyanide, free [as free] | daily maximum | report only (mg/L) | all year | 013 |
| Cyanide, free [as free] | daily maximum | report only (mg/L) | all year | 013 |
| Cyanide, free [as free] | monthly average | report only (lb/d) | all year | 013 |
| Cyanide, free [as free] | monthly average | report only (lb/d) | all year | 013 |
| Cyanide, free [as free] | daily maximum | report only (lb/d) | all year | 013 |
| Cyanide, free [as free] | daily maximum | report only (lb/d) | all year | 013 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | all year | 013 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | all year | 013 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 013 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 013 |
| Cyanide, total [as CN] | monthly average | report only (lb/d) | all year | 013 |
| Cyanide, total [as CN] | monthly average | report only (lb/d) | all year | 013 |
| Cyanide, total [as CN] | daily maximum | report only (lb/d) | all year | 013 |
| Cyanide, total [as CN] | daily maximum | report only (lb/d) | all year | 013 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 013 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 013 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 013 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 013 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 013 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 013 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 013 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 013 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 013 |
| Zinc, total recoverable | monthly average | ≤ 10.4 lb/d | all year | 013 |
| Zinc, total recoverable | monthly average | ≤ 8.86 lb/d | all year | 013 |
| Zinc, total recoverable | daily maximum | ≤ 22 lb/d | all year | 013 |
| Zinc, total recoverable | daily maximum | ≤ 22 lb/d | all year | 013 |
| Lead, total recoverable | monthly average | ≤ 14 ug/L | all year | 013 |
| Lead, total recoverable | monthly average | ≤ 14 ug/L | all year | 013 |
| Lead, total recoverable | daily maximum | ≤ 27 ug/L | all year | 013 |
| Lead, total recoverable | daily maximum | ≤ 27 ug/L | all year | 013 |
| Lead, total recoverable | monthly average | ≤ 1.1 lb/d | all year | 013 |
| Lead, total recoverable | monthly average | ≤ 1.1 lb/d | all year | 013 |
| Lead, total recoverable | daily maximum | ≤ 2.2 lb/d | all year | 013 |
| Lead, total recoverable | daily maximum | ≤ 2.2 lb/d | all year | 013 |
| Phenolics, total recoverable | monthly average | report only (mg/L) | all year | 013 |
| Phenolics, total recoverable | monthly average | report only (mg/L) | all year | 013 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 013 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 013 |
| Phenolics, total recoverable | monthly average | report only (lb/d) | all year | 013 |
| Phenolics, total recoverable | monthly average | report only (lb/d) | all year | 013 |
| Phenolics, total recoverable | daily maximum | report only (lb/d) | all year | 013 |
| Phenolics, total recoverable | daily maximum | report only (lb/d) | all year | 013 |
| Oxidants, total residual | monthly average | ≤ 1.8 ug/L | all year | 013 |
| Oxidants, total residual | monthly average | ≤ 1.8 ug/L | all year | 013 |
| Oxidants, total residual | daily maximum | < 20 ug/L | all year | 013 |
| Oxidants, total residual | daily maximum | < 20 ug/L | all year | 013 |
| Oxidants, total residual | monthly average | ≤ .14 lb/d | all year | 013 |
| Oxidants, total residual | monthly average | ≤ .14 lb/d | all year | 013 |
| Oxidants, total residual | daily maximum | < 4.8 lb/d | all year | 013 |
| Oxidants, total residual | daily maximum | < 4.8 lb/d | all year | 013 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 013 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 013 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 013 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 013 |
| Mercury, total recoverable | monthly average | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 013 |
| Mercury, total recoverable | monthly average | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 013 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 013 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 013 |
| Mercury, total recoverable | monthly average | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 013 |
| Mercury, total recoverable | monthly average | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 013 |
| Mercury, total recoverable | daily maximum | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 013 |
| Mercury, total recoverable | daily maximum | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 013 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 013 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 013 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 014 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 014 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 014 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 014 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 014 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 014 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 014 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 014 |
| pH | daily minimum | ≥ 6 SU | all year | 014 |
| pH | daily minimum | ≥ 6 SU | all year | 014 |
| pH | daily maximum | ≤ 9 SU | all year | 014 |
| pH | daily maximum | ≤ 9 SU | all year | 014 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 014 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 014 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 014 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 014 |
| Solids, total suspended | monthly average | ≤ 5770 lb/d | all year | 014 |
| Solids, total suspended | monthly average | ≤ 5294 lb/d | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 14800 lb/d | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 13849 lb/d | all year | 014 |
| Oil and grease, hexane extr method | monthly average | ≤ 10 mg/L | all year | 014 |
| Oil and grease, hexane extr method | monthly average | ≤ 10 mg/L | all year | 014 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 014 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 014 |
| Oil and grease, hexane extr method | monthly average | ≤ 1421 lb/d | all year | 014 |
| Oil and grease, hexane extr method | monthly average | ≤ 1421 lb/d | all year | 014 |
| Oil and grease, hexane extr method | daily maximum | ≤ 4172 lb/d | all year | 014 |
| Oil and grease, hexane extr method | daily maximum | ≤ 4172 lb/d | all year | 014 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 014 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 014 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 014 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 014 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year | 014 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year | 014 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year | 014 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year | 014 |
| Cyanide, free [as free] | monthly average | report only (mg/L) | all year | 014 |
| Cyanide, free [as free] | monthly average | report only (mg/L) | all year | 014 |
| Cyanide, free [as free] | daily maximum | report only (mg/L) | all year | 014 |
| Cyanide, free [as free] | daily maximum | report only (mg/L) | all year | 014 |
| Cyanide, free [as free] | monthly average | report only (lb/d) | all year | 014 |
| Cyanide, free [as free] | monthly average | report only (lb/d) | all year | 014 |
| Cyanide, free [as free] | daily maximum | report only (lb/d) | all year | 014 |
| Cyanide, free [as free] | daily maximum | report only (lb/d) | all year | 014 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | all year | 014 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | all year | 014 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 014 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 014 |
| Cyanide, total [as CN] | monthly average | report only (lb/d) | all year | 014 |
| Cyanide, total [as CN] | monthly average | report only (lb/d) | all year | 014 |
| Cyanide, total [as CN] | daily maximum | report only (lb/d) | all year | 014 |
| Cyanide, total [as CN] | daily maximum | report only (lb/d) | all year | 014 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 014 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 014 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 014 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 014 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 014 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 014 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 014 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 014 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Zinc, total recoverable | monthly average | ≤ 10.4 lb/d | all year | 014 |
| Zinc, total recoverable | monthly average | ≤ 10.4 lb/d | all year | 014 |
| Zinc, total recoverable | daily maximum | ≤ 22 lb/d | all year | 014 |
| Zinc, total recoverable | daily maximum | ≤ 22 lb/d | all year | 014 |
| Lead, total recoverable | monthly average | ≤ 14 ug/L | all year | 014 |
| Lead, total recoverable | monthly average | ≤ 14 ug/L | all year | 014 |
| Lead, total recoverable | daily maximum | ≤ 27 ug/L | all year | 014 |
| Lead, total recoverable | daily maximum | ≤ 27 ug/L | all year | 014 |
| Lead, total recoverable | monthly average | ≤ 1.1 lb/d | all year | 014 |
| Lead, total recoverable | monthly average | ≤ 1.1 lb/d | all year | 014 |
| Lead, total recoverable | daily maximum | ≤ 2.2 lb/d | all year | 014 |
| Lead, total recoverable | daily maximum | ≤ 2.2 lb/d | all year | 014 |
| Phenolics, total recoverable | monthly average | report only (mg/L) | all year | 014 |
| Phenolics, total recoverable | monthly average | report only (mg/L) | all year | 014 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 014 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 014 |
| Phenolics, total recoverable | monthly average | report only (lb/d) | all year | 014 |
| Phenolics, total recoverable | monthly average | report only (lb/d) | all year | 014 |
| Phenolics, total recoverable | daily maximum | report only (lb/d) | all year | 014 |
| Phenolics, total recoverable | daily maximum | report only (lb/d) | all year | 014 |
| Oxidants, total residual | monthly average | ≤ 1.8 ug/L | all year | 014 |
| Oxidants, total residual | monthly average | ≤ 1.8 ug/L | all year | 014 |
| Oxidants, total residual | daily maximum | < 20 ug/L | all year | 014 |
| Oxidants, total residual | daily maximum | < 20 ug/L | all year | 014 |
| Oxidants, total residual | monthly average | ≤ .14 lb/d | all year | 014 |
| Oxidants, total residual | monthly average | ≤ .14 lb/d | all year | 014 |
| Oxidants, total residual | daily maximum | < 4.8 lb/d | all year | 014 |
| Oxidants, total residual | daily maximum | < 4.8 lb/d | all year | 014 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | Feb, Aug | 014 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | Jan, Jul | 014 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 9.8 tox chronic | Feb, Aug | 014 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 9.8 tox chronic | Jan, Jul | 014 |
| Mercury, total recoverable | monthly average | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 014 |
| Mercury, total recoverable | monthly average | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 014 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 014 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 014 |
| Mercury, total recoverable | monthly average | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 014 |
| Mercury, total recoverable | monthly average | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 014 |
| Mercury, total recoverable | daily maximum | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 014 |
| Mercury, total recoverable | daily maximum | report only (lb/d) | Feb, Apr, Jun, Aug, Oct, Dec | 014 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 014 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 014 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 018 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 018 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 018 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 018 |
| pH | daily minimum | ≥ 6 SU | all year | 018 |
| pH | daily maximum | ≤ 9.5 SU | all year | 018 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 018 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 018 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 018 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 018 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 018 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year | 018 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year | 018 |
| Cyanide, free [as free] | monthly average | report only (ug/L) | all year | 018 |
| Cyanide, free [as free] | monthly average | ≤ 22 ug/L | all year | 018 |
| Cyanide, free [as free] | daily maximum | report only (ug/L) | all year | 018 |
| Cyanide, free [as free] | daily maximum | ≤ 44 ug/L | all year | 018 |
| Cyanide, free [as free] | monthly average | report only (lb/d) | all year | 018 |
| Cyanide, free [as free] | monthly average | ≤ 3.7 lb/d | all year | 018 |
| Cyanide, free [as free] | daily maximum | report only (lb/d) | all year | 018 |
| Cyanide, free [as free] | daily maximum | ≤ 7.3 lb/d | all year | 018 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 018 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 018 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 018 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 018 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 018 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 018 |
| Zinc, total recoverable | monthly average | report only (lb/d) | all year | 018 |
| Zinc, total recoverable | daily maximum | report only (lb/d) | all year | 018 |
| Lead, total recoverable | monthly average | ≤ 14 ug/L | all year | 018 |
| Lead, total recoverable | daily maximum | ≤ 27 ug/L | all year | 018 |
| Lead, total recoverable | monthly average | ≤ 2.3 lb/d | all year | 018 |
| Lead, total recoverable | daily maximum | ≤ 4.5 lb/d | all year | 018 |
| Phenolics, total recoverable | monthly average | report only (mg/L) | all year | 018 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 018 |
| Phenolics, total recoverable | monthly average | report only (lb/d) | all year | 018 |
| Phenolics, total recoverable | daily maximum | report only (lb/d) | all year | 018 |
| Oxidants, total residual | monthly average | ≤ .98 ug/L | all year | 018 |
| Oxidants, total residual | daily maximum | < 20 ug/L | all year | 018 |
| Oxidants, total residual | monthly average | ≤ .16 lb/d | all year | 018 |
| Oxidants, total residual | daily maximum | < 10 lb/d | all year | 018 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 018 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 018 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | Feb, Aug | 018 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | Jan, Jul | 018 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 5.4 tox chronic | Feb, Aug | 018 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 5.4 tox chronic | Jan, Jul | 018 |
| Mercury, total recoverable | annual average | ≤ 2.5 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 018 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 018 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 018 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 518 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 518 |
| Solids, total suspended | monthly average | ≤ 110 lb/d | all year | 518 |
| Solids, total suspended | daily maximum | ≤ 293 lb/d | all year | 518 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 518 |
| Oil and grease, hexane extr method | daily maximum | ≤ 73 lb/d | all year | 518 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 518 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 518 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 73 lb/d | all year | 518 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 219 lb/d | all year | 518 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | all year | 518 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 518 |
| Cyanide, total [as CN] | monthly average | ≤ 7.3 lb/d | all year | 518 |
| Cyanide, total [as CN] | daily maximum | ≤ 14.6 lb/d | all year | 518 |
| Selenium, total recoverable | monthly average | report only (mg/L) | all year | 518 |
| Selenium, total recoverable | daily maximum | report only (mg/L) | all year | 518 |
| Selenium, total recoverable | monthly average | report only (lb/d) | all year | 518 |
| Selenium, total recoverable | daily maximum | report only (lb/d) | all year | 518 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 518 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 518 |
| Zinc, total recoverable | monthly average | ≤ 3.28 lb/d | all year | 518 |
| Zinc, total recoverable | daily maximum | ≤ 9.85 lb/d | all year | 518 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 518 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 518 |
| Lead, total recoverable | monthly average | ≤ 2.19 lb/d | all year | 518 |
| Lead, total recoverable | daily maximum | ≤ 6.58 lb/d | all year | 518 |
| Phenolics, total recoverable | monthly average | report only (mg/L) | all year | 518 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 518 |
| Phenolics, total recoverable | monthly average | ≤ .73 lb/d | all year | 518 |
| Phenolics, total recoverable | daily maximum | ≤ 1.46 lb/d | all year | 518 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 518 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 518 |
| Chlorine, total residual | daily maximum | report only (ug/L) | all year | 518 |
| Chlorine, total residual | daily maximum | ≤ 3.65 lb/d | all year | 518 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 618 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 618 |
| Solids, total suspended | monthly average | ≤ 886 lb/d | all year | 618 |
| Solids, total suspended | daily maximum | ≤ 2652 lb/d | all year | 618 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 618 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 618 |
| Oil and grease, hexane extr method | monthly average | ≤ 136 lb/d | all year | 618 |
| Oil and grease, hexane extr method | daily maximum | ≤ 408 lb/d | all year | 618 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 618 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 618 |
| Zinc, total recoverable | monthly average | ≤ 5.04 lb/d | all year | 618 |
| Zinc, total recoverable | daily maximum | ≤ 15.1 lb/d | all year | 618 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 618 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 618 |
| Lead, total recoverable | monthly average | ≤ 3.36 lb/d | all year | 618 |
| Lead, total recoverable | daily maximum | ≤ 10.06 lb/d | all year | 618 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 618 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 618 |
Cited limits by parameter: Indiana's rules and the federal ones.
Same industry: the 54 Primary Metal Industries permits in Indiana.
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