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Petroleum Refining, major discharger, Mount Vernon, Indiana. NPDES permit IN0002470, in force until Mar 31, 2027. Last 12 months: over a limit 8 times (last March 2026), 10 required values missing, 2 of 109 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| December 2025 | 001 | BOD, 5-day, 20 deg. C, monthly average | 113.5 lb/d | ≤ 106 lb/d | 7% |
| January 2026 | 001 | BOD, 5-day, 20 deg. C, monthly average | 108.9 lb/d | ≤ 106 lb/d | 3% |
| February 2026 | 001 | BOD, 5-day, 20 deg. C, daily maximum | 199.2 lb/d | ≤ 191 lb/d | 4% |
| February 2026 | 001 | BOD, 5-day, 20 deg. C, monthly average | 192.6 lb/d | ≤ 106 lb/d | 82% |
| March 2026 | 002 | BOD, 5-day, 20 deg. C, daily maximum | 83.1 mg/L | ≤ 40 mg/L | 108% |
| March 2026 | 002 | Chemical Oxygen Demand [COD], daily maximum | 309 mg/L | ≤ 300 mg/L | 3% |
| March 2026 | 002 | Solids, total suspended, daily maximum | 39 mg/L | ≤ 28 mg/L | 39% |
| March 2026 | 006 | Solids, total suspended, daily maximum | 322.7 mg/L | ≤ 45 mg/L | 617% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Flow rate | monthly average | report only (MGD) | all year | 001 |
| Flow rate | daily maximum | report only (MGD) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 106 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 191 lb/d | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | ≤ 129 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 202 lb/d | all year | 001 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease, hexane extr method | monthly average | ≤ 31 lb/d | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 48 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 58 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 128 lb/d | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfide, total [as S] | monthly average | report only (mg/L) | all year | 001 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfide, total [as S] | monthly average | ≤ .56 lb/d | all year | 001 |
| Sulfide, total [as S] | daily maximum | ≤ 1.26 lb/d | all year | 001 |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, total recoverable | daily maximum | ≤ .01 mg/L | Mar, Jun, Sep, Dec | 001 |
| Phenolics, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Phenolics, total recoverable | monthly average | ≤ .69 lb/d | all year | 001 |
| Phenolics, total recoverable | daily maximum | ≤ 1.43 lb/d | all year | 001 |
| Benzene | daily maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 10 tox acute (alert, not enforceable) | Mar, Sep | 001 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 10 tox acute (alert, not enforceable) | Apr, Oct | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 10 tox acute (alert, not enforceable) | Mar, Sep | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 10 tox acute (alert, not enforceable) | Apr, Oct | 001 |
| Mercury, total recoverable | monthly average | ≤ 12 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Mercury, total recoverable | daily maximum | ≤ 20 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Mercury, total recoverable | monthly average | ≤ .000035 lb/d | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Mercury, total recoverable | daily maximum | ≤ .000058 lb/d | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Volatile compounds, [GC/MS] | daily maximum | report only (mg/L) | all year | 001 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 001 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 001 |
| Chemical Oxygen Demand [COD] | monthly average | ≤ 742 lb/d | all year | 001 |
| Chemical Oxygen Demand [COD] | daily maximum | ≤ 1430 lb/d | all year | 001 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 001 |
| TU Static 48Hr Acute Daphnia magna | maximum | ≤ 10 tox acute (alert, not enforceable) | Mar, Sep | 001 |
| TU Static 48Hr Acute Daphnia magna | maximum | ≤ 10 tox acute (alert, not enforceable) | Apr, Oct | 001 |
| TU Static 48Hr Acute Daphnia pulex | maximum | ≤ 10 tox acute (alert, not enforceable) | Mar, Sep | 001 |
| TU Static 48Hr Acute Daphnia pulex | maximum | ≤ 10 tox acute (alert, not enforceable) | Apr, Oct | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 40 mg/L | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 28 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Sulfide, total [as S] | monthly average | report only (mg/L) | all year | 002 |
| Sulfide, total [as S] | daily maximum | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 002 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 002 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 002 |
| Fluoride, total [as F] | monthly average | report only (mg/L) | all year | 002 |
| Fluoride, total [as F] | monthly average | report only (mg/L) | all year | 002 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, total recoverable | monthly average | report only (mg/L) | all year | 002 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year | 002 |
| Chromium, total recoverable | monthly average | report only (mg/L) | all year | 002 |
| Chromium, total recoverable | daily maximum | ≤ .01 mg/L | all year | 002 |
| Phenolics, total recoverable | monthly average | report only (mg/L) | all year | 002 |
| Phenolics, total recoverable | daily maximum | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (Mgal/mo) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (Mgal/mo) | all year | 002 |
| Chemical Oxygen Demand [COD] | monthly average | report only (mg/L) | all year | 002 |
| Chemical Oxygen Demand [COD] | daily maximum | ≤ 300 mg/L | all year | 002 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 002 |
| pH | daily maximum | report only (SU) | all year | 003 |
| pH | daily maximum | report only (SU) | Dec | 003 |
| pH | daily maximum | report only (SU) | Dec | 003 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 003 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 003 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 003 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 003 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 003 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 003 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 003 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 003 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 003 |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year | 003 |
| Benzene | daily maximum | report only (mg/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Volatile compounds, [GC/MS] | daily maximum | report only (mg/L) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 003 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 003 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 003 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 003 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 003 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 003 |
| pH | daily maximum | report only (SU) | all year | 004 |
| pH | daily maximum | report only (SU) | Dec | 004 |
| pH | daily maximum | report only (SU) | Dec | 004 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 004 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 004 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 004 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 004 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 004 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 004 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 004 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 004 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 004 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 004 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 004 |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year | 004 |
| Benzene | daily maximum | report only (mg/L) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Volatile compounds, [GC/MS] | daily maximum | report only (mg/L) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 004 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 004 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 004 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 004 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 004 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 004 |
| pH | daily maximum | report only (SU) | all year | 005 |
| pH | daily maximum | report only (SU) | Dec | 005 |
| pH | daily maximum | report only (SU) | Dec | 005 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 005 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 005 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 005 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 005 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 005 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 005 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 005 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 005 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 005 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 005 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 005 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 005 |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year | 005 |
| Benzene | daily maximum | report only (mg/L) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Volatile compounds, [GC/MS] | daily maximum | report only (mg/L) | all year | 005 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 005 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 005 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 005 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 005 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 005 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 005 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 005 |
| pH | daily maximum | report only (SU) | all year | 006 |
| pH | daily maximum | report only (SU) | Dec | 006 |
| pH | daily maximum | report only (SU) | Dec | 006 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 006 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 006 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 006 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 006 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 006 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 006 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 006 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 006 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 006 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 006 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 006 |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year | 006 |
| Benzene | daily maximum | report only (mg/L) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Volatile compounds, [GC/MS] | daily maximum | report only (mg/L) | all year | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 006 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 006 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 006 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 006 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 006 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 006 |
| pH | daily maximum | report only (SU) | all year | 007 |
| pH | daily maximum | report only (SU) | Dec | 007 |
| pH | daily maximum | report only (SU) | Dec | 007 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 007 |
| Solids, total suspended | daily maximum | report only (mg/L) | Dec | 007 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 007 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 007 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Dec | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 007 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | all year | 007 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 007 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 007 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Dec | 007 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 007 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | Dec | 007 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 007 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Dec | 007 |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Benzene | daily maximum | report only (mg/L) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Volatile compounds, [GC/MS] | daily maximum | report only (mg/L) | all year | 007 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 007 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Dec | 007 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 007 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | Dec | 007 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 007 |
| Storm water flow | daily maximum | report only (MGD) | Dec | 007 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 007 |
Cited limits by parameter: Indiana's rules and the federal ones.
Same industry: the 41 Petroleum Refining and Related Industries permits in Indiana.
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