MARION WWTP, CITY OF

NPDES permit IN0025585 · Major POTW · effective, expires 2029-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
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

4values over a limit
0required values missing, on 0 form(s)
0of 83 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (3), Nitrogen, ammonia total [as N] (1).

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 (79)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DLYAVMIN >= 5 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Oxygen, dissolved [DO]DLYAVMIN >= 4 mg/L Jan, Feb, Mar, Apr, Dec
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 15 mg/L all year
001Solids, total suspendedMX WK AV <= 22.5 mg/L all year
001Solids, total suspendedMO AVG <= 2128 lb/d all year
001Solids, total suspendedMX WK AV <= 3192 lb/d 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 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 <= 4.5 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 212.8 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 425.6 lb/d Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 326.3 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 638.4 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
001Nickel, total recoverableQB report only Mar, Jun, Sep, Dec
001Nickel, total recoverableQB report only Mar, Jun, Sep, Dec
001Zinc, total recoverableQB report only Mar, Jun, Sep, Dec
001Zinc, total recoverableQB report only Mar, Jun, Sep, Dec
001Cadmium, total recoverableQB report only Mar, Jun, Sep, Dec
001Cadmium, total recoverableQB 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 recoverableQB report only Mar, Jun, Sep, Dec
001Chromium, total recoverableQB 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
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Jul
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Jul
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute Jun
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.3 tox chronic Jul
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.3 tox chronic Jul
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1.3 tox chronic Jun
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Jul
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Jul
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute Jun
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.3 tox chronic Jul
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.3 tox chronic Jul
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1.3 tox chronic Jun
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 22.5 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 2128 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 3192 lb/d all year
001Phosphorus, total percent removalMO AV MN >= 65 % all year
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
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
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
015DurationMO TOTAL report only all year
015Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
015Precipitation, monthly accumulationMO TOTAL report only all year
015Discharge event observation [Visual Monitoring]MO TOTAL report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states