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NPDES permit IN0023914 · Major POTW · effective, expires 2031-07-31 · EPA's file as of 2026-09-19

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Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

2values over a limit
2required values missing, on 1 form(s)
2of 106 forms filed late

Last period with anything received: 2026-07-31. Most often over: Copper, total recoverable (2).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (104)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DLYAVMIN >= 6 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Oxygen, dissolved [DO]DLYAVMIN >= 5 mg/L Jan, Feb, Mar, Apr, Dec
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMO AVG <= 12 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMX WK AV <= 45 mg/L Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMX WK AV <= 18 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMO AVG <= 4006 lb/d Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMO AVG <= 1602 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMX WK AV <= 6008 lb/d Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMX WK AV <= 2403 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Oil and grease, hexane extr methodMO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 3.4 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 2.3 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 5.1 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 200 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 454 lb/d Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 307 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 681 lb/d Jan, Feb, Mar, Apr, Dec
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Phosphorus, total [as P]MO AVG report only all year
001Cyanide, free [as free]MO AVG <= .0053 mg/L all year
001Cyanide, free [as free]DAILY MX <= .011 mg/L all year
001Cyanide, free [as free]MO AVG report only all year
001Cyanide, free [as free]DAILY MX report only all year
001Nickel, total recoverableMO AVG report only all year
001Nickel, total recoverableDAILY MX report only all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX report only all year
001Cadmium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Cadmium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Cadmium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Cadmium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Lead, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Lead, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Lead, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Lead, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Copper, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Copper, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Chlorine, total residualMO AVG < .06 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX < .06 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001E. coli, colony forming units [CFU]MO GEO <= 125 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001E. coli, colony forming units [CFU]DAILY MX <= 235 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001E. coli, colony forming units [CFU]DAILY MX report only Apr, May, Jun, Jul, Aug, Sep, Oct
001Number of EventsMO TOTAL report only Apr, May, Jun, Jul, Aug, Sep, Oct
001Number of EventsMO TOTAL report only Apr, May, Jun, Jul, Aug, Sep, Oct
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute (alert) Jan, Jul
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Feb, Aug
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.1 tox chronic (alert) Jan, Jul
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.1 tox chronic Feb, Aug
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute (alert) Jan, Jul
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Feb, Aug
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.1 tox chronic (alert) Jan, Jul
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.1 tox chronic Feb, Aug
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 3338 lb/d Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 1335 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 5341 lb/d Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 2003 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Flow, totalMO TOTAL report only all year
002DurationMO TOTAL report only all year
002Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
002Precipitation, monthly accumulationMO TOTAL report only all year
002Discharge event observation [Visual Monitoring]MO TOTAL report only all year
003DurationMO TOTAL report only all year
003Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
003Precipitation, monthly accumulationMO TOTAL report only all year
003Discharge event observation [Visual Monitoring]MO TOTAL report only all year
004DurationMO TOTAL report only all year
004Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
004Precipitation, monthly accumulationMO TOTAL report only all year
004Discharge event observation [Visual Monitoring]MO TOTAL report only all year
005DurationMO TOTAL report only all year
005Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
005Precipitation, monthly accumulationMO TOTAL report only all year
005Discharge event observation [Visual Monitoring]MO TOTAL report only all year
006DurationMO TOTAL report only all year
006Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
006Precipitation, monthly accumulationMO TOTAL report only all year
006Discharge event observation [Visual Monitoring]MO TOTAL report only all year
007DurationMO TOTAL report only all year
007Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
007Precipitation, monthly accumulationMO TOTAL report only all year
007Discharge event observation [Visual Monitoring]MO TOTAL report only all year
008DurationMO TOTAL report only all year
008Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
008Precipitation, monthly accumulationMO TOTAL report only all year
008Discharge event observation [Visual Monitoring]MO TOTAL report only all year
009DurationMO TOTAL report only all year
009Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
009Precipitation, monthly accumulationMO TOTAL report only all year
009Discharge event observation [Visual Monitoring]MO TOTAL report only all year

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