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Mishawaka Municipal WWTP

Sewage treatment plant, major discharger, Mishawaka, Indiana. NPDES permit IN0025640, in force until Apr 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (27 values), outfall 001 form AQ quarterly (42 values), outfall 002 form C monthly (4 values), outfall 003 form C monthly (4 values), outfall 004 form C monthly (4 values), outfall 006 form C monthly (4 values), and 12 more forms
Renewal application due
Nov 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 212 reports late

Limits in force (156)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 10515 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 15772 lb/dall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 5.8 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 13.1 mg/LMay–Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 13.5 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1752 lb/dMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 2033 lb/dJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 4591 lb/dMay–Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 4732 lb/dJan, Feb, Mar, Apr, Dec001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Cyanide, free [as free]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Cyanide, free [as free]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Cyanide, free [as free]daily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Cyanide, free [as free]daily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Cyanide, free [as free]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Cyanide, free [as free]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Nickel, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Nickel, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Nickel, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Nickel, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Nickel, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Nickel, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Cadmium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Cadmium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Cadmium, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Cadmium, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Cadmium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Cadmium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Lead, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Lead, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Lead, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Lead, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Lead, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Lead, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Chromium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Chromium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Chromium, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Chromium, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Chromium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Chromium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Copper, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Copper, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Copper, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Copper, total recoverabledaily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Copper, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Copper, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Chlorine, total residualmonthly average≤ .02 mg/LApr–Oct001
Chlorine, total residualdaily maximum< .06 mg/LApr–Oct001
Chlorine, total residualmonthly average≤ 7 lb/dApr–Oct001
Chlorine, total residualdaily maximum< 21 lb/dApr–Oct001
E. coli, colony forming units [CFU]monthly geometric meanreport only (CFU/100mL)Jan, Feb, Mar, Nov, Dec001
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct001
E. coli, colony forming units [CFU]daily maximumreport only (CFU/100mL)Jan, Feb, Mar, Nov, Dec001
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteApr, Oct001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteMay, Nov001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteMay, Nov001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 8.5 tox chronicApr, Oct001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 8.5 tox chronicMay, Nov001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 8.5 tox chronicMay, Nov001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteApr, Oct001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteMay, Nov001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteMay, Nov001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 8.5 tox chronicApr, Oct001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 8.5 tox chronicMay, Nov001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 8.5 tox chronicMay, Nov001
Mercury, total recoverableannual average≤ 2.7 ng/LFeb, Apr, Jun, Aug, Oct, Dec001
Mercury, total recoverablemonthly average≤ 4.9 ng/LFeb, Apr, Jun, Aug, Oct, Dec001
Mercury, total recoverabledaily maximumreport only (ng/L)Feb, Apr, Jun, Aug, Oct, Dec001
Mercury, total recoverabledaily maximumreport only (ng/L)Feb, Apr, Jun, Aug, Oct, Dec001
Mercury, total recoverabledaily maximumreport only (ng/L)Feb, Apr, Jun, Aug, Oct, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8762 lb/dall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 14020 lb/dall year001
Phosphorus, total percent removalmonthly average minimum≥ 75 %all year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
Durationmonthly totalreport only (hr/mo)all year002
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year002
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year002
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year002
Durationmonthly totalreport only (hr/mo)all year003
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year003
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year003
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year003
Durationmonthly totalreport only (hr/mo)all year004
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year004
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year004
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year004
Durationmonthly totalreport only (hr/mo)all year006
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year006
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year006
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year006
Durationmonthly totalreport only (hr/mo)all year008
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year008
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year008
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year008
Durationmonthly totalreport only (hr/mo)all year009
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year009
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year009
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year009
Durationmonthly totalreport only (hr/mo)all year011
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year011
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year011
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year011
Durationmonthly totalreport only (hr/mo)all year012
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year012
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year012
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year012
Durationmonthly totalreport only (hr/mo)all year013
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year013
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year013
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year013
Durationmonthly totalreport only (hr/mo)all year014
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year014
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year014
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year014
Durationmonthly totalreport only (hr/mo)all year015
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year015
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year015
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year015
Durationmonthly totalreport only (hr/mo)all year016
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year016
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year016
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year016
Durationmonthly totalreport only (hr/mo)all year018
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year018
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year018
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year018
Durationmonthly totalreport only (hr/mo)all year019
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year019
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year019
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year019
Durationmonthly totalreport only (hr/mo)all year020
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year020
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year020
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year020
Durationmonthly totalreport only (hr/mo)all year021
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (Mgal)all year021
Precipitation, monthly accumulationmonthly totalreport only (in/mo)all year021
Discharge event observation [Visual Monitoring]monthly totalreport only (#/mo)all year021

How strict are these limits?

Cited limits by parameter: Indiana's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IN0025640 · MCP: https://passage-data.com/mcp