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Marion Co Comm San Eng Dept

Sewage treatment plant, Marion, Ohio. NPDES permit OH0036765, in force until Oct 31, 2027. Last 12 months: over a limit 3 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (25 values), outfall 002 form A monthly (24 values), outfall 901 form A monthly (4 values)
Renewal application due
May 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
13 values over a limit, 6 required values missing, 0 of 37 reports late

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

Period endingOutfallParameterReportedLimitOver by
November 2025002Solids, total suspended, monthly average18≤ 12 mg/L50%
November 2025002Solids, total suspended, weekly maximum28≤ 18 mg/L56%
April 2026001pH, daily maximum9.2≤ 9 SU—

Limits in force (63)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly maximum≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 22.7 kg/dall year001
Solids, total suspendedweekly maximum≤ 34.1 kg/dall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
E. coli, MTEC-MFmonthly geometric meanreport only (MPN/100mL)May–Oct001
E. coli, MTEC-MFdaily maximumreport only (MPN/100mL)May–Oct001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year001
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 19 kg/dall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 30.3 kg/dall year001
Temperature, water deg. centigrademonthly averagereport only (deg C)all year002
Temperature, water deg. centigradedaily maximumreport only (deg C)all year002
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year002
pHdaily minimum≥ 6.5 SUall year002
pHdaily maximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 12 mg/Lall year002
Solids, total suspendedweekly maximum≤ 18 mg/Lall year002
Solids, total suspendedmonthly average≤ 3.6 kg/dall year002
Solids, total suspendedweekly maximum≤ 5.5 kg/dall year002
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LMay–Oct002
Nitrogen, ammonia total [as N]monthly average≤ 7 mg/LJan, Feb, Mar, Apr, Nov, Dec002
Nitrogen, ammonia total [as N]weekly maximum≤ 2.7 mg/LMay–Oct002
Nitrogen, ammonia total [as N]weekly maximum≤ 10.5 mg/LJan, Feb, Mar, Apr, Nov, Dec002
Nitrogen, ammonia total [as N]monthly average≤ .55 kg/dMay–Oct002
Nitrogen, ammonia total [as N]monthly average≤ 2.1 kg/dJan, Feb, Mar, Apr, Nov, Dec002
Nitrogen, ammonia total [as N]weekly maximum≤ .82 kg/dMay–Oct002
Nitrogen, ammonia total [as N]weekly maximum≤ 3.2 kg/dJan, Feb, Mar, Apr, Nov, Dec002
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec002
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec002
Phosphorus, total [as P]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec002
Phosphorus, total [as P]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec002
Turbidity [severity]monthly averagereport only (severity)all year002
Turbidity [severity]daily maximumreport only (severity)all year002
E. coli, MTEC-MFmonthly geometric mean≤ 126 MPN/100mLMay–Oct002
E. coli, MTEC-MFweekly geometric mean≤ 284 MPN/100mLMay–Oct002
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 residualdaily maximum≤ .019 mg/LMay–Oct002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year002
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 15 mg/Lall year002
BOD, carbonaceous [5 day, 20 C]monthly average≤ 3 kg/dall year002
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 4.5 kg/dall year002
Sludge waste from secondary clarifiersmonthly averagereport only (gal)Dec588
Sludge waste from secondary clarifiersdaily maximumreport only (gal)Dec588
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year901
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year901
pHdaily minimumreport only (SU)all year901
pHdaily maximumreport only (SU)all year901

How strict are these limits?

Cited limits by parameter: Ohio'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/OH0036765 · MCP: https://passage-data.com/mcp