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Michigan City - J.B. Gifford WWTP

Sewage treatment plant, major discharger, Michigan City, Indiana. NPDES permit IN0023752, in force until Aug 31, 2030. Last 12 months: over a limit 5 times (last June 2026), 1 of 32 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form B monthly (40 values), outfall 001 form BQ quarterly (24 values), outfall 001 form TX twice a year (4 values), outfall 002 form CP monthly (13 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 1 required value missing, 1 of 32 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
May 2026Nitrogen, ammonia total [as N], daily maximum10.4 mg/L≤ 3.1 mg/L235%
May 2026Nitrogen, ammonia total [as N], daily maximum499 lb/d≤ 388 lb/d29%
June 2026Nitrogen, ammonia total [as N], daily maximum495.7 lb/d≤ 388 lb/d28%
June 2026Nitrogen, ammonia total [as N], daily maximum8.45 mg/L≤ 3.1 mg/L173%
June 2026Nitrogen, ammonia total [as N], monthly average2 mg/L≤ 1.3 mg/L54%

Limits in force (105)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily average minimum≥ 7 mg/Lall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 6 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 9 mg/Lall year001
Solids, total suspendedmonthly average≤ 751 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 1127 lb/dall year001
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 mg/LMay–Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 3.3 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 163 lb/dMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 175 lb/dJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 388 lb/dMay–Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 413 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]monthly average≤ .0056 mg/Lall year001
Cyanide, free [as free]daily maximum≤ .011 mg/Lall year001
Cyanide, free [as free]monthly average≤ .56 lb/dall year001
Cyanide, free [as free]daily maximum≤ 1.1 lb/dall year001
Cyanide, free [as free]monthly averagereport only (mg/L)all year001
Cyanide, free [as free]daily maximumreport only (mg/L)all year001
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 (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 (mg/L)Mar, Jun, Sep, Dec001
Zinc, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Cadmium, total recoverablemonthly average≤ .006 mg/Lall year001
Cadmium, total recoverablemonthly average≤ .0019 mg/Lall year001
Cadmium, total recoverabledaily maximum≤ .012 mg/Lall year001
Cadmium, total recoverabledaily maximum≤ .0039 mg/Lall year001
Cadmium, total recoverablemonthly average≤ .6 lb/dall year001
Cadmium, total recoverablemonthly average≤ .19 lb/dall year001
Cadmium, total recoverabledaily maximum≤ 1.2 lb/dall year001
Cadmium, total recoverabledaily maximum≤ .39 lb/dall year001
Cadmium, total recoverablemonthly averagereport only (mg/L)all year001
Cadmium, total recoverabledaily maximumreport only (mg/L)all year001
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 (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 (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 (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≤ .01 mg/LApr–Oct001
Chlorine, total residualmonthly average≤ .01 mg/LJan, Feb, Mar, Nov, Dec001
Chlorine, total residualdaily maximum< .06 mg/LApr–Oct001
Chlorine, total residualdaily maximum< .06 mg/LJan, Feb, Mar, Nov, Dec001
Chlorine, total residualmonthly average≤ 1.25 lb/dApr–Oct001
Chlorine, total residualmonthly average≤ 1.25 lb/dJan, Feb, Mar, Nov, Dec001
Chlorine, total residualdaily maximum< 7.5 lb/dApr–Oct001
Chlorine, total residualdaily maximum< 7.5 lb/dJan, Feb, Mar, Nov, Dec001
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct001
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct001
Number of Eventsmonthly totalreport only (# exceed)Jan, Feb, Mar, Nov, Dec001
Number of Eventsmonthly totalreport only (#)Jan, Feb, Mar, Nov, Dec001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acute (alert, not enforceable)Feb, Aug001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acute (alert, not enforceable)Mar, Sep001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1.3 tox chronic (alert, not enforceable)Feb, Aug001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1.3 tox chronic (alert, not enforceable)Mar, Sep001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acute (alert, not enforceable)Feb, Aug001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acute (alert, not enforceable)Mar, Sep001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1.3 tox chronic (alert, not enforceable)Feb, Aug001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1.3 tox chronic (alert, not enforceable)Mar, Sep001
Mercury, total recoverablemonthly average≤ 1.3 ng/LFeb, Apr, Jun, Aug, Oct, Dec001
Mercury, total recoverabledaily maximum≤ 3.2 ng/LFeb, Apr, Jun, Aug, Oct, Dec001
Mercury, total recoverablemonthly average≤ .00013 lb/dFeb, Apr, Jun, Aug, Oct, Dec001
Mercury, total recoverabledaily maximum≤ .00032 lb/dFeb, Apr, Jun, Aug, Oct, Dec001
Mercury, total recoverablemonthly averagereport 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≤ 5 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 7.5 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 626 lb/dall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 939 lb/dall year001
Phosphorus, total percent removalmonthly average minimum≥ 75 %all year001
Flow, totalmonthly totalreport only (Mgal/mo)all year001
pHdaily minimumreport only (SU)all year002
pHdaily maximumreport only (SU)all year002
Solids, total suspendedmonthly averagereport only (mg/L)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Chlorine, total residualmonthly average≤ .01 mg/LApr–Oct002
Chlorine, total residualdaily maximum< .06 mg/LApr–Oct002
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct002
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct002
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year002
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year002
Flow, totalmonthly totalreport only (Mgal/mo)all year002

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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