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Winamac WWTP

Sewage treatment plant, Winamac, Indiana. NPDES permit IN0020516 expired Sep 30, 2026; its limits still apply. Last 12 months: over a limit 22 times (last August 2026), 3 of 30 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (28 values), outfall 001 form AQ quarterly (12 values), outfall 001 form TA yearly (4 values), outfall 002 form C monthly (4 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
20 values over a limit, 6 required values missing, 4 of 32 reports late

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

All 22 values over a limit
Period endingParameterReportedLimitOver by
October 2025Phosphorus, total [as P], monthly average1.3236 mg/L≤ 1 mg/L32%
November 2025Phosphorus, total [as P], monthly average1.47 mg/L≤ 1 mg/L47%
December 2025Nitrogen, ammonia total [as N], monthly average22.02 mg/L≤ 10.2 mg/L116%
December 2025Nitrogen, ammonia total [as N], monthly average38.731 lb/d≤ 36.9 lb/d5%
December 2025Nitrogen, ammonia total [as N], maximum weekly average24.367 mg/L≤ 15.3 mg/L59%
January 2026Nitrogen, ammonia total [as N], monthly average19.35 mg/L≤ 10.2 mg/L90%
January 2026Nitrogen, ammonia total [as N], monthly average37.02 lb/d≤ 36.9 lb/d0%
January 2026Nitrogen, ammonia total [as N], maximum weekly average22.63 mg/L≤ 15.3 mg/L48%
February 2026Nitrogen, ammonia total [as N], monthly average19.733 mg/L≤ 10.2 mg/L93%
February 2026Nitrogen, ammonia total [as N], monthly average39.976 lb/d≤ 36.9 lb/d8%
February 2026Nitrogen, ammonia total [as N], maximum weekly average20.967 mg/L≤ 15.3 mg/L37%
March 2026Nitrogen, ammonia total [as N], monthly average11.568 mg/L≤ 10.2 mg/L13%
March 2026Nitrogen, ammonia total [as N], maximum weekly average17.9 mg/L≤ 15.3 mg/L17%
April 2026Chlorine, total residual, daily maximum.07 mg/L< .06 mg/L17%
April 2026Nitrogen, ammonia total [as N], monthly average11.906 mg/L≤ 10.2 mg/L17%
April 2026Nitrogen, ammonia total [as N], monthly average51.287 lb/d≤ 36.9 lb/d39%
April 2026Nitrogen, ammonia total [as N], maximum weekly average68.388 lb/d≤ 55.4 lb/d23%
May 2026Chlorine, total residual, daily maximum.06 mg/L< .06 mg/L0%
July 2026Chlorine, total residual, daily maximum.06 mg/L< .06 mg/L0%
August 2026Chlorine, total residual, daily minimum0 mg/L≥ .5 mg/L100%
August 2026Chlorine, total residual, daily maximum.06 mg/L< .06 mg/L0%
August 2026E. coli, colony forming units [CFU], daily maximum416 CFU/100mL≤ 235 CFU/100mL77%

Limits in force (72)

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≤ 109 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 163 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 10.2 mg/Lall year001
Nitrogen, ammonia total [as N]maximum weekly average≤ 15.3 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 36.9 lb/dall year001
Nitrogen, ammonia total [as N]maximum weekly average≤ 55.4 lb/dall year001
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
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
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
Chromium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Chromium, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Copper, total recoverablemonthly averagereport only (mg/L)all year001
Copper, total recoverablemonthly average≤ .043 mg/Lall year001
Copper, total recoverabledaily maximumreport only (mg/L)all year001
Copper, total recoverabledaily maximum≤ .086 mg/Lall year001
Copper, total recoverablemonthly averagereport only (mg/L)all year001
Copper, total recoverabledaily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Chlorine, total residualmonthly average< .06 mg/LApr–Oct001
Chlorine, total residualdaily maximum< .06 mg/LApr–Oct001
Chlorine, total residualdaily minimum≥ .5 mg/LApr–Oct001
Chlorine, total residualdaily maximumreport only (mg/L)Apr–Oct001
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
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteSep001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteOct001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteOct001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 70 tox chronicSep001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 70 tox chronicOct001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 70 tox chronicOct001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteSep001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteOct001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteOct001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 70 tox chronicSep001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 70 tox chronicOct001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 70 tox chronicOct001
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≤ 91 lb/dall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 145 lb/dall 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
Copper, dry weightvaluereport only (mg/kg)Jun, DecPRT
Copper, dry weightvaluereport only (mg/kg)Jun, DecPRT
Cadmium, dry weightvaluereport only (mg/kg)Jun, DecPRT
Cadmium, dry weightvaluereport only (mg/kg)Jun, DecPRT
Molybdenum, sludge, total, dry weight [as Mo]valuereport only (mg/kg)Jun, DecPRT
Molybdenum, sludge, total, dry weight [as Mo]valuereport only (mg/kg)Jun, DecPRT
Zinc, sludge, total, dry weight [as Zn]valuereport only (mg/kg)Jun, DecPRT
Zinc, sludge, total, dry weight [as Zn]valuereport only (mg/kg)Jun, DecPRT
Lead, sludge, total, dry weight [as Pb]valuereport only (mg/kg)Jun, DecPRT
Lead, sludge, total, dry weight [as Pb]valuereport only (mg/kg)Jun, DecPRT
Nickel, sludge, total, dry weight [as Ni]valuereport only (mg/kg)Jun, DecPRT
Nickel, sludge, total, dry weight [as Ni]valuereport only (mg/kg)Jun, DecPRT
Mercury, sludge, total, dry weight [as Hg]valuereport only (mg/kg)Jun, DecPRT
Mercury, sludge, total, dry weight [as Hg]valuereport only (mg/kg)Jun, DecPRT

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/IN0020516 · MCP: https://passage-data.com/mcp