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Nine Mile Creek WWTP

Sewage treatment plant, major discharger, Cincinnati, Ohio. NPDES permit OH0049361, in force until Nov 30, 2030. Last 12 months: no values over a limit, 108 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (32 values), outfall 300 form A monthly (2 values), outfall 601 form A monthly (6 values), outfall 801 form A monthly (8 values), outfall 901 form A monthly (14 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 64 reports late

Limits in force (126)

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≥ 4.8 mg/Lall year001
Solids, total suspendedmonthly average≤ 22.8 mg/Lall year001
Solids, total suspendedweekly maximum≤ 34.2 mg/Lall year001
Solids, total suspendedmonthly average≤ 259 kg/dall year001
Solids, total suspendedweekly maximum≤ 388 kg/dall year001
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 9.4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 10.2 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 14.1 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 15.3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 107 kg/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 116 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 160 kg/dMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 174 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, Kjeldahl, 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
Phosphate, ortho, dissolved [as P]monthly averagereport only (mg/L)all year001
Phosphate, ortho, dissolved [as P]daily maximumreport only (mg/L)all year001
Nickel, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec001
Nickel, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec001
Zinc, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec001
Zinc, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec001
Cadmium, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec001
Cadmium, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec001
Lead, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec001
Lead, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec001
Chromium, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec001
Chromium, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec001
Copper, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec001
Copper, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec001
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 1000 #/100mLJan, Feb, Mar, Apr, Nov, Dec001
Coliform, fecal MF, MFC broth, 44.5 Cweekly geometric mean≤ 2000 #/100mLJan, Feb, Mar, Apr, Nov, Dec001
E. coli, MTEC-MFmonthly geometric mean≤ 126 MPN/100mLMay–Oct001
E. coli, MTEC-MFweekly geometric mean≤ 240 MPN/100mLMay–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
Mercury, total low levelmonthly averagereport only (ng/L)Mar, Jun, Aug, Dec001
Mercury, total low leveldaily maximumreport only (ng/L)Mar, Jun, Aug, Dec001
Cyanide, free availablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec001
Cyanide, free availabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec001
Toxicity [acute], Ceriodaphnia dubiamonthly averagereport only (tox acute)Aug001
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (tox acute)Aug001
Toxicity [acute], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox acute)Aug001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox acute)Aug001
pH, maximumdaily maximum≤ 9 SUall year001
pH, minimumdaily minimum≥ 6.5 SUall 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≤ 19 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 30 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 216 kg/dall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 341 kg/dall year001
Overflowsmonthly averagereport only (occur/mo)all year300
Overflowsdaily maximumreport only (occur/mo)all year300
Nitrogen, ammonia in bottom depositsmonthly averagereport only (mg/kg)Jun, Dec581
Nitrogen, ammonia in bottom depositsdaily maximumreport only (mg/kg)Jun, Dec581
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/kg)Jun, Dec581
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/kg)Jun, Dec581
Phosphorous, total, in bottom depositsmonthly averagereport only (mg/kg)Jun, Dec581
Phosphorous, total, in bottom depositsdaily maximumreport only (mg/kg)Jun, Dec581
Potassium, in bottom depositsmonthly averagereport only (mg/kg)Jun, Dec581
Potassium, in bottom depositsdaily maximumreport only (mg/kg)Jun, Dec581
Arsenic, dry weightdaily maximum≤ 75 mg/kgJun, Dec581
Cadmium, in bottom deposits [dry wgt]daily maximum≤ 85 mg/kgJun, Dec581
Copper in bottom deposits [dry wgt]daily maximum≤ 4300 mg/kgJun, Dec581
Lead, total dry weight [as Pb]daily maximum≤ 840 mg/kgJun, Dec581
Nickel, tot in bottom deposits [dry wgt]daily maximum≤ 420 mg/kgJun, Dec581
Zinc in bottom deposits [dry wgt]daily maximum≤ 7500 mg/kgJun, Dec581
Selenium, dry weightdaily maximum≤ 100 mg/kgJun, Dec581
Biosolids weight indluding admixturesmonthly averagereport only (dry ton)Jun, Dec581
Biosolids weight indluding admixturesdaily maximumreport only (dry ton)Jun, Dec581
Fecal coliform in sludge, CFU/gramdaily maximum≤ 2000000 CFU/gJun, Dec581
Sludge weight, drymonthly averagereport only (dry ton)Jun, Dec581
Sludge weight, drydaily maximumreport only (dry ton)Jun, Dec581
Mercury, tot in bot deposits [dry wgt]daily maximum≤ 57 mg/kgJun, Dec581
Molybdenum, sludge, total, dry weight [as Mo]daily maximum≤ 75 mg/kgJun, Dec581
Biosolids weight indluding admixturesmonthly averagereport only (dry ton)Dec586
Biosolids weight indluding admixturesdaily maximumreport only (dry ton)Dec586
Sludge weight, drymonthly averagereport only (dry ton)Dec588
Sludge weight, drydaily maximumreport only (dry ton)Dec588
pHdaily minimumreport only (SU)all year601
pHdaily maximumreport only (SU)all year601
Solids, total suspendedmonthly averagereport only (mg/L)all year601
Solids, total suspendeddaily maximumreport only (mg/L)all year601
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year601
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year601
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year801
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year801
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year801
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year801
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year801
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year801
Phosphorus, total [as P]monthly averagereport only (mg/L)all year801
Phosphorus, total [as P]daily maximumreport only (mg/L)all year801
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric meanreport only (#/100mL)Jan, Feb, Mar, Apr, Nov, Dec801
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximumreport only (#/100mL)Jan, Feb, Mar, Apr, Nov, Dec801
E. coli, MTEC-MFmonthly geometric meanreport only (MPN/100mL)Jun–Aug801
E. coli, MTEC-MFdaily maximumreport only (MPN/100mL)Jun–Aug801
%Effect Static Renewal 48Hr Acute Ceriodaphnia dubiamonthly averagereport only (%)Aug801
%Effect Static Renewal 48Hr Acute Ceriodaphnia dubiadaily maximumreport only (%)Aug801
%Effect Static Renewal 96Hr Acute Pimephales promelasmonthly averagereport only (%)Aug801
%Effect Static Renewal 96Hr Acute Pimephales promelasdaily maximumreport only (%)Aug801
Temperature, water deg. centigrademonthly averagereport only (deg C)all year901
Temperature, water deg. centigradedaily maximumreport only (deg C)all year901
pHdaily minimumreport only (SU)all year901
pHdaily maximumreport only (SU)all year901
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year901
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year901
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year901
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year901
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year901
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year901
Phosphorus, total [as P]monthly averagereport only (mg/L)all year901
Phosphorus, total [as P]daily maximumreport only (mg/L)all year901
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year901
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year901
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric meanreport only (#/100mL)Jan, Feb, Mar, Apr, Nov, Dec901
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximumreport only (#/100mL)Jan, Feb, Mar, Apr, Nov, Dec901
E. coli, MTEC-MFmonthly geometric meanreport only (MPN/100mL)Jun–Aug901
E. coli, MTEC-MFdaily maximumreport only (MPN/100mL)Jun–Aug901

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/OH0049361 · MCP: https://passage-data.com/mcp