NPDES permit IN0038172 · Major NON-POTW · effective, expires 2028-05-31 · EPA's file as of 2026-09-19
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Last period with anything received: 2026-07-31. Most often over: Cyanide, free [as free] (7), Chromium, hexavalent dissolved [as Cr] (6), Chromium, total recoverable (5).
Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).
| Outfall | Parameter | Statistic | Limit | Months |
|---|---|---|---|---|
| 001 | pH | DAILY MN | >= 6 SU | all year |
| 001 | pH | DAILY MX | <= 9 SU | all year |
| 001 | Solids, total suspended | MO AVG | <= 10 mg/L | all year |
| 001 | Solids, total suspended | DAILY MX | <= 15 mg/L | all year |
| 001 | Solids, total suspended | MO AVG | <= 12 lb/d | all year |
| 001 | Solids, total suspended | DAILY MX | <= 18 lb/d | all year |
| 001 | Oil and grease, hexane extr method | MO AVG | <= 10 mg/L | all year |
| 001 | Oil and grease, hexane extr method | DAILY MX | <= 15 mg/L | all year |
| 001 | Oil and grease, hexane extr method | MO AVG | <= 12 lb/d | all year |
| 001 | Oil and grease, hexane extr method | DAILY MX | <= 18 lb/d | all year |
| 001 | Cyanide, free [as free] | MO AVG | <= .09 mg/L | all year |
| 001 | Cyanide, free [as free] | DAILY MX | <= .16 mg/L | all year |
| 001 | Cyanide, free [as free] | MO AVG | <= .11 lb/d | all year |
| 001 | Cyanide, free [as free] | DAILY MX | <= .19 lb/d | all year |
| 001 | Cyanide, total [as CN] | MO AVG | report only | all year |
| 001 | Cyanide, total [as CN] | DAILY MX | report only | all year |
| 001 | Cyanide, total [as CN] | MO AVG | <= .15 lb/d | all year |
| 001 | Cyanide, total [as CN] | DAILY MX | <= .36 lb/d | all year |
| 001 | Chloride [as Cl] | MO AVG | report only | Mar, Jun, Sep, Dec |
| 001 | Chloride [as Cl] | MO AVG | report only | Mar, Jun, Sep, Dec |
| 001 | Chloride [as Cl] | DAILY MX | report only | Mar, Jun, Sep, Dec |
| 001 | Chloride [as Cl] | DAILY MX | report only | Mar, Jun, Sep, Dec |
| 001 | Chloride [as Cl] | MO AVG | report only | Mar, Jun, Sep, Dec |
| 001 | Chloride [as Cl] | MO AVG | report only | Mar, Jun, Sep, Dec |
| 001 | Chloride [as Cl] | DAILY MX | report only | Mar, Jun, Sep, Dec |
| 001 | Chloride [as Cl] | DAILY MX | report only | Mar, Jun, Sep, Dec |
| 001 | Sulfate, total [as SO4] | MO AVG | report only | all year |
| 001 | Sulfate, total [as SO4] | DAILY MX | report only | all year |
| 001 | Sulfate, total [as SO4] | MO AVG | report only | all year |
| 001 | Sulfate, total [as SO4] | DAILY MX | report only | all year |
| 001 | Iron, total recoverable | MO AVG | report only | all year |
| 001 | Iron, total recoverable | DAILY MX | report only | all year |
| 001 | Iron, total recoverable | MO AVG | <= .78 lb/d | all year |
| 001 | Iron, total recoverable | DAILY MX | <= 1.5 lb/d | all year |
| 001 | Nickel, total recoverable | MO AVG | report only | all year |
| 001 | Nickel, total recoverable | DAILY MX | report only | all year |
| 001 | Nickel, total recoverable | MO AVG | report only | all year |
| 001 | Nickel, total recoverable | DAILY MX | report only | all year |
| 001 | Zinc, total recoverable | MO AVG | report only | all year |
| 001 | Zinc, total recoverable | DAILY MX | report only | all year |
| 001 | Zinc, total recoverable | MO AVG | <= .73 lb/d | all year |
| 001 | Zinc, total recoverable | DAILY MX | <= 1.7 lb/d | all year |
| 001 | Aluminum, total recoverable | MO AVG | report only | all year |
| 001 | Aluminum, total recoverable | DAILY MX | report only | all year |
| 001 | Aluminum, total recoverable | MO AVG | <= .048 lb/d | all year |
| 001 | Aluminum, total recoverable | DAILY MX | <= .12 lb/d | all year |
| 001 | Chromium, total recoverable | MO AVG | report only | all year |
| 001 | Chromium, total recoverable | DAILY MX | <= .25 mg/L | all year |
| 001 | Chromium, total recoverable | MO AVG | <= .21 lb/d | all year |
| 001 | Chromium, total recoverable | DAILY MX | <= .52 lb/d | all year |
| 001 | Copper, total recoverable | MO AVG | <= .18 mg/L | all year |
| 001 | Copper, total recoverable | DAILY MX | <= .41 mg/L | all year |
| 001 | Copper, total recoverable | MO AVG | <= .22 lb/d | all year |
| 001 | Copper, total recoverable | DAILY MX | <= .49 lb/d | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | MO AVG | <= .08 mg/L | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | DAILY MX | <= .16 mg/L | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | MO AVG | <= .1 lb/d | all year |
| 001 | Chromium, hexavalent dissolved [as Cr] | DAILY MX | <= .19 lb/d | all year |
| 001 | Flow, in conduit or thru treatment plant | MO AVG | report only | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 001 | Chlorine, total residual | MO AVG | <= .11 mg/L | all year |
| 001 | Chlorine, total residual | DAILY MX | <= .2 mg/L | all year |
| 001 | Chlorine, total residual | MO AVG | <= .13 lb/d | all year |
| 001 | Chlorine, total residual | DAILY MX | <= .24 lb/d | all year |
| 001 | Toxicity [acute], Ceriodaphnia dubia | MAXIMUM | <= 13.1 tox acute | Feb, May, Aug, Nov |
| 001 | Toxicity [acute], Ceriodaphnia dubia | MAXIMUM | <= 13.1 toxic | Jan, Apr, Jul, Oct |
| 001 | Toxicity [chronic], Ceriodaphnia dubia | MAXIMUM | <= 33 tox chronic | Feb, May, Aug, Nov |
| 001 | Toxicity [chronic], Ceriodaphnia dubia | MAXIMUM | <= 33 toxic | Jan, Apr, Jul, Oct |
| 001 | Toxicity [acute], Pimephales promelas [Fathead Minnow] | MAXIMUM | <= 13.1 tox acute | Feb, May, Aug, Nov |
| 001 | Toxicity [acute], Pimephales promelas [Fathead Minnow] | MAXIMUM | <= 13.1 toxic | Jan, Apr, Jul, Oct |
| 001 | Toxicity [chronic], Pimephales promelas [Fathead Minnow] | MAXIMUM | report only | Feb, May, Aug, Nov |
| 001 | Toxicity [chronic], Pimephales promelas [Fathead Minnow] | MAXIMUM | <= 33 toxic | Jan, Apr, Jul, Oct |
| 001 | Mercury, total recoverable | MO AVG | <= 12 ng/L | Feb, Apr, Jun, Aug, Oct, Dec |
| 001 | Mercury, total recoverable | DAILY MX | <= 20 ng/L | Feb, Apr, Jun, Aug, Oct, Dec |
| 001 | Flow, total | MO TOTAL | report only | all year |
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