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Montpelier WWTP

Sewage treatment plant, Montpelier, Indiana. NPDES permit IN0020117, in force until Feb 28, 2031. Last 12 months: over a limit 8 times (last August 2026), 5 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (20 values), outfall 002 form C monthly (4 values), outfall 004 form C monthly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
10 values over a limit, 1 required value missing, 7 of 36 reports late

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

Period endingParameterReportedLimit
January 2026pH, daily maximum9.2 SU≤ 9 SU
February 2026pH, daily maximum9.3 SU≤ 9 SU
March 2026pH, daily maximum9.2 SU≤ 9 SU
April 2026pH, daily maximum9.4 SU≤ 9 SU
May 2026pH, daily maximum9.5 SU≤ 9 SU
June 2026pH, daily maximum9.3 SU≤ 9 SU
July 2026pH, daily maximum9.2 SU≤ 9 SU
August 2026pH, daily maximum9.1 SU≤ 9 SU

Limits in force (28)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 70 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 105 mg/Lall year001
Solids, total suspendedmonthly average≤ 584.2 lb/dall year001
Solids, total suspendedmaximum weekly average≤ 876.2 lb/dall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Chlorine, total residualmonthly average< .06 mg/Lall year001
Chlorine, total residualdaily maximum< .06 mg/Lall year001
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
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≤ 208.6 lb/dall year001
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 333.8 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
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

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/IN0020117 · MCP: https://passage-data.com/mcp