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Butler County Water and Sewer Department

Sewage treatment plant, major discharger, West Chester, Ohio. NPDES permit OH0072087 expired Dec 31, 2023; its limits still apply. Last 12 months: over a limit 19 times (last August 2026), 6 required values missing, 10 of 58 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (50 values), outfall 300 form A monthly (2 values), outfall 601 form A monthly (22 values), outfall 801 form A monthly (13 values), outfall 901 form A monthly (15 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
7 values over a limit, 0 required values missing, 13 of 63 reports late

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

All 19 values over a limit
Period endingParameterReportedLimitOver by
March 2026Oil and grease, hexane extr method, daily maximum12.4≤ 10 mg/L24%
March 2026Solids, total suspended, weekly maximum1300≤ 1100 kg/d18%
April 2026Oil and grease, hexane extr method, daily maximum28.5≤ 10 mg/L185%
April 2026Phosphorus, total [as P], monthly average1.1≤ 1 mg/L10%
April 2026Phosphorus, total [as P], weekly maximum1.7≤ 1.5 mg/L13%
May 2026E. coli, MTEC-MF, monthly geometric meanT≤ 126 #/100mL—
May 2026E. coli, MTEC-MF, weekly geometric meanT≤ 284 #/100mL—
May 2026Nitrogen, ammonia total [as N], monthly average1.67≤ 1 mg/L67%
May 2026Nitrogen, ammonia total [as N], monthly average84.9≤ 60.6 kg/d40%
May 2026Nitrogen, ammonia total [as N], weekly maximum239≤ 90.9 kg/d163%
May 2026Nitrogen, ammonia total [as N], weekly maximum4.26≤ 1.5 mg/L184%
July 2026Phosphorus, total [as P], monthly average1.3≤ 1 mg/L30%
July 2026Phosphorus, total [as P], weekly maximum2.4≤ 1.5 mg/L60%
August 2026Nitrogen, ammonia total [as N], weekly maximum1.8≤ 1.5 mg/L20%
August 2026Nitrogen, ammonia total [as N], weekly maximum130≤ 90.9 kg/d43%
August 2026Phosphorus, total [as P], weekly maximum2.2≤ 1.5 mg/L47%
August 2026Phosphorus, total [as P], weekly maximum96≤ 90.9 kg/d6%
August 2026Solids, total suspended, weekly maximum2400≤ 1100 kg/d118%
August 2026Solids, total suspended, weekly maximum29≤ 18 mg/L61%

Limits in force (172)

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≥ 6 mg/Lall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendedweekly maximum≤ 18 mg/Lall year001
Solids, total suspendedmonthly average≤ 727 kg/dall year001
Solids, total suspendedweekly maximum≤ 1100 kg/dall year001
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 1.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 4.5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 60.6 kg/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 182 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 90.9 kg/dMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 273 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrite + Nitrate total [as N]monthly average≤ 5 mg/Lall year001
Nitrite + Nitrate total [as N]weekly maximum≤ 7.5 mg/Lall year001
Nitrite + Nitrate total [as N]monthly average≤ 303 kg/dall year001
Nitrite + Nitrate total [as N]weekly maximum≤ 455 kg/dall year001
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year001
Phosphorus, total [as P]weekly maximum≤ 1.5 mg/Lall year001
Phosphorus, total [as P]monthly average≤ 60.6 kg/dall year001
Phosphorus, total [as P]weekly maximum≤ 90.9 kg/dall 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
Selenium, total recoverablemonthly averagereport only (ug/L)all year001
Selenium, total recoverabledaily maximumreport only (ug/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)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
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
Chromium, hexavalent dissolved [as Cr]monthly average≤ 11 ug/Lall year001
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 16 ug/Lall year001
Chromium, hexavalent dissolved [as Cr]monthly average≤ .667 kg/dall year001
Chromium, hexavalent dissolved [as Cr]daily maximum≤ .969 kg/dall year001
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLMay–Oct001
E. coli, MTEC-MFweekly geometric mean≤ 284 #/100mLMay–Oct001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ 8.6 ug/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 1113 ug/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ .521 kg/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 67.5 kg/dall year001
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)all year001
Mercury, total low leveldaily maximumreport only (ng/L)all year001
Cyanide, free availablemonthly averagereport only (ug/L)all year001
Cyanide, free availabledaily maximumreport only (ug/L)all year001
Toxicity [acute], Ceriodaphnia dubiamonthly averagereport only (tox acute)Mar, Jun, Aug, Dec001
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (tox acute)Mar, Jun, Aug, Dec001
Toxicity [chronic], Ceriodaphnia dubiamonthly averagereport only (tox chronic)Mar, Jun, Aug, Dec001
Toxicity [chronic], Ceriodaphnia dubiadaily maximumreport only (tox chronic)Mar, Jun, Aug, Dec001
Toxicity [acute], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox acute)Mar, Jun, Aug, Dec001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox acute)Mar, Jun, Aug, Dec001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox chronic)Mar, Jun, Aug, Dec001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox chronic)Mar, Jun, Aug, Dec001
pH, maximumdaily maximum≤ 9 SUall year001
pH, minimumdaily minimum≥ 6.5 SUall year001
Solids, total dissolved- 180 deg. Cmonthly average≤ 1523 mg/Lall year001
Solids, total dissolved- 180 deg. Cmonthly average≤ 92300 kg/dall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 606 kg/dall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 909 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)Dec581
Nitrogen, ammonia in bottom depositsdaily maximumreport only (mg/kg)Dec581
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/kg)Dec581
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/kg)Dec581
Phosphorous, total, in bottom depositsmonthly averagereport only (mg/kg)Dec581
Phosphorous, total, in bottom depositsdaily maximumreport only (mg/kg)Dec581
Potassium, in bottom depositsmonthly averagereport only (mg/kg)Dec581
Potassium, in bottom depositsdaily maximumreport only (mg/kg)Dec581
Arsenic, dry weightdaily maximum≤ 75 mg/kgDec581
Cadmium, in bottom deposits [dry wgt]daily maximum≤ 85 mg/kgDec581
Copper in bottom deposits [dry wgt]daily maximum≤ 4300 mg/kgDec581
Lead, total dry weight [as Pb]daily maximum≤ 840 mg/kgDec581
Nickel, tot in bottom deposits [dry wgt]daily maximum≤ 420 mg/kgDec581
Zinc in bottom deposits [dry wgt]daily maximum≤ 7500 mg/kgDec581
Selenium, dry weightdaily maximum≤ 100 mg/kgDec581
Biosolids weight indluding admixturesmonthly averagereport only (dry ton)Dec581
Biosolids weight indluding admixturesdaily maximumreport only (dry ton)Dec581
Fecal coliform in sludge, CFU/gramdaily maximum≤ 2000000 CFU/gDec581
Sludge weight, drymonthly averagereport only (dry ton)Dec581
Sludge weight, drydaily maximumreport only (dry ton)Dec581
Mercury, tot in bot deposits [dry wgt]daily maximum≤ 57 mg/kgDec581
Molybdenum, sludge, total, dry weight [as Mo]daily maximum≤ 75 mg/kgDec581
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
Solids, total suspendedmonthly averagereport only (mg/L)all year601
Solids, total suspendeddaily maximumreport only (mg/L)all year601
Phosphorus, total [as P]monthly averagereport only (mg/L)all year601
Phosphorus, total [as P]daily maximumreport only (mg/L)all year601
Cyanide, total [as CN]monthly averagereport only (mg/L)all year601
Cyanide, total [as CN]daily maximumreport only (mg/L)all year601
Nickel, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec601
Nickel, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec601
Zinc, total recoverablemonthly averagereport only (ug/L)all year601
Zinc, total recoverabledaily maximumreport only (ug/L)all year601
Cadmium, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec601
Cadmium, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec601
Lead, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec601
Lead, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec601
Chromium, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec601
Chromium, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec601
Copper, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec601
Copper, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec601
Selenium, total [as Se]monthly averagereport only (ug/L)all year601
Selenium, total [as Se]daily maximumreport only (ug/L)all year601
Chromium, hexavalent dissolved [as Cr]monthly averagereport only (ug/L)all year601
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year601
Di[2-ethylhexyl] phthalate [DEHP]monthly averagereport only (ug/L)all year601
Di[2-ethylhexyl] phthalate [DEHP]daily maximumreport only (ug/L)all year601
Mercury, total low levelmonthly averagereport only (ng/L)all year601
Mercury, total low leveldaily maximumreport only (ng/L)all year601
pH, maximumdaily maximumreport only (SU)all year601
pH, minimumdaily minimumreport only (SU)all year601
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year601
Solids, total dissolved- 180 deg. Cdaily 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
Temperature, water deg. centigrademonthly averagereport only (deg C)all year801
Temperature, water deg. centigradedaily maximumreport only (deg C)all year801
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year801
pHdaily minimumreport only (SU)all year801
pHdaily maximumreport only (SU)all year801
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year801
Nitrogen, ammonia 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
E. coli, MTEC-MFmonthly geometric meanreport only (#/100mL)Jun–Aug801
E. coli, MTEC-MFdaily maximumreport only (#/100mL)Jun–Aug801
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year801
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year801
%Effect Static Renewal 48Hr Acute Ceriodaphnia dubiamonthly averagereport only (%)Mar, Jun, Aug, Dec801
%Effect Static Renewal 48Hr Acute Ceriodaphnia dubiadaily maximumreport only (%)Mar, Jun, Aug, Dec801
%Effect Static Renewal 96Hr Acute Pimephales promelasmonthly averagereport only (%)Mar, Jun, Aug, Dec801
%Effect Static Renewal 96Hr Acute Pimephales promelasdaily maximumreport only (%)Mar, Jun, Aug, Dec801
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly averagereport only (%)Mar, Jun, Aug, Dec801
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximumreport only (%)Mar, Jun, Aug, Dec801
%Effect Static Renewal 7Day Chronic Pimephales promelasmonthly averagereport only (%)Mar, Jun, Aug, Dec801
%Effect Static Renewal 7Day Chronic Pimephales promelasdaily maximumreport only (%)Mar, Jun, Aug, Dec801
Temperature, water deg. centigrademonthly averagereport only (deg C)all year901
Temperature, water deg. centigradedaily maximumreport only (deg C)all year901
Oxygen, dissolved [DO]daily minimumreport only (mg/L)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
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
E. coli, MTEC-MFmonthly geometric meanreport only (#/100mL)Jun–Aug901
E. coli, MTEC-MFdaily maximumreport only (#/100mL)Jun–Aug901
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year901
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year901

How strict are these limits?

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

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Your permit document is the final word. As JSON: /api/v1/permits/OH0072087 · MCP: https://passage-data.com/mcp