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North Vernon WWTP

Sewage treatment plant, major discharger, North Vernon, Indiana. NPDES permit IN0020451, in force until Jan 31, 2030. Last 12 months: over a limit 9 times (last August 2026), 18 required values missing, 9 of 40 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (29 values), outfall 001 form AQ quarterly (16 values), outfall 002 form C monthly (4 values), outfall 006 form CP monthly (13 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
7 values over a limit, 35 required values missing, 12 of 42 reports late

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

Period endingOutfallParameterReportedLimitOver by
October 2025001Chlorine, total residual, daily maximum.58 mg/L< .06 mg/L867%
October 2025001Chlorine, total residual, daily maximum.58 mg/L< .06 mg/L867%
April 2026006E. coli, colony forming units [CFU], daily maximum> 2419 CFU/100mL≤ 235 CFU/100mL—
April 2026006E. coli, colony forming units [CFU], monthly geometric mean> 2419 CFU/100mL≤ 125 CFU/100mL—
May 2026006Chlorine, total residual, daily maximum.06 mg/L< .06 mg/L0%
May 2026006E. coli, colony forming units [CFU], daily maximum506 CFU/100mL≤ 235 CFU/100mL115%
August 2026006Chlorine, total residual, daily maximum1.85 mg/L< .06 mg/L2983%
August 2026006Chlorine, total residual, monthly average1.85 mg/L< .06 mg/L2983%
August 2026006E. coli, colony forming units [CFU], monthly geometric mean185 CFU/100mL≤ 125 CFU/100mL48%

Limits in force (83)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/LMay–Nov001
Oxygen, dissolved [DO]daily average minimum≥ 5 mg/LJan, Feb, Mar, Apr, Dec001
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≤ 1192 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 1788 lb/dall year001
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≤ 1.5 mg/LMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 2.2 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.2 mg/LMay–Nov001
Nitrogen, ammonia total [as N]maximum weekly average≤ 3.3 mg/LJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 60 lb/dMay–Nov001
Nitrogen, ammonia total [as N]monthly average≤ 87 lb/dJan, Feb, Mar, Apr, Dec001
Nitrogen, ammonia total [as N]maximum weekly average≤ 87 lb/dMay–Nov001
Nitrogen, ammonia total [as N]maximum weekly average≤ 131 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 (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 (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
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
Copper, total recoverablemonthly average≤ .016 mg/Lall year001
Copper, total recoverabledaily maximum≤ .031 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
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 acute (alert, not enforceable)Feb, Aug001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acute (alert, not enforceable)Feb, Aug001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acute (alert, not enforceable)Feb, Aug001
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 1 tox acuteJan, Jul001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronic (alert, not enforceable)Feb, Aug001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronic (alert, not enforceable)Feb, Aug001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronic (alert, not enforceable)Feb, Aug001
Toxicity [chronic], Ceriodaphnia dubiamaximum≤ 1 tox chronicJan, Jul001
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)Feb, Aug001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acute (alert, not enforceable)Feb, Aug001
Toxicity [acute], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox acuteJan, Jul001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronic (alert, not enforceable)Feb, Aug001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronic (alert, not enforceable)Feb, Aug001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronic (alert, not enforceable)Feb, Aug001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]maximum≤ 1 tox chronicJan, Jul001
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≤ 993 lb/dall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 1589 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
pHdaily minimumreport only (SU)all year006
pHdaily maximumreport only (SU)all year006
Solids, total suspendedmonthly averagereport only (mg/L)all year006
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year006
Chlorine, total residualmonthly average< .06 mg/LApr–Oct006
Chlorine, total residualdaily maximum< .06 mg/LApr–Oct006
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct006
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct006
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year006
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (mg/L)all year006
Flow, totalmonthly totalreport only (Mgal/mo)all year006

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IN0020451 · MCP: https://passage-data.com/mcp