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Mechanicsburg, Village of

Sewage treatment plant, Mechanicsburg, Ohio. NPDES permit OH0022209, in force until Dec 31, 2027. Last 12 months: over a limit 47 times (last August 2026). 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 (4 values)
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
45 values over a limit, 0 required values missing, 0 of 49 reports late

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

All 47 values over a limit
Period endingParameterReportedLimitOver by
October 2025E. coli, MTEC-MF, monthly geometric mean328≤ 126 MPN/100mL160%
October 2025E. coli, MTEC-MF, weekly geometric mean959≤ 284 MPN/100mL238%
October 2025Phosphorus, total [as P], monthly average1.12≤ 1 mg/L12%
October 2025Solids, total suspended, monthly average13≤ 12 mg/L8%
November 2025Phosphorus, total [as P], monthly average1.66≤ 1 mg/L66%
November 2025Phosphorus, total [as P], weekly maximum1.66≤ 1.5 mg/L11%
November 2025Solids, total suspended, monthly average16≤ 12 mg/L33%
November 2025Solids, total suspended, weekly maximum35≤ 18 mg/L94%
December 2025Phosphorus, total [as P], monthly average1.21≤ 1 mg/L21%
January 2026Nitrogen, ammonia total [as N], monthly average4.28≤ 2 mg/L114%
January 2026Nitrogen, ammonia total [as N], weekly maximum3.08≤ 2.62 kg/d18%
January 2026Nitrogen, ammonia total [as N], weekly maximum8.25≤ 3 mg/L175%
March 2026BOD, carbonaceous [5 day, 20 C], weekly maximum16≤ 15 mg/L7%
March 2026BOD, carbonaceous [5 day, 20 C], weekly maximum28≤ 13.1 kg/d114%
March 2026Nitrogen, ammonia total [as N], monthly average2.5≤ 2 mg/L25%
March 2026Nitrogen, ammonia total [as N], monthly average3.3≤ 1.75 kg/d89%
March 2026Nitrogen, ammonia total [as N], weekly maximum11≤ 2.62 kg/d320%
March 2026Nitrogen, ammonia total [as N], weekly maximum6.5≤ 3 mg/L117%
March 2026Solids, total suspended, monthly average15≤ 10.5 kg/d43%
March 2026Solids, total suspended, weekly maximum28≤ 18 mg/L56%
March 2026Solids, total suspended, weekly maximum49≤ 15.7 kg/d212%
April 2026Phosphorus, total [as P], monthly average1.44≤ 1 mg/L44%
May 2026Nitrogen, ammonia total [as N], monthly average1.6≤ 1.4 mg/L14%
May 2026Nitrogen, ammonia total [as N], weekly maximum2.8≤ 2 kg/d40%
May 2026Nitrogen, ammonia total [as N], weekly maximum6.1≤ 2.25 mg/L171%
June 2026E. coli, MTEC-MF, monthly geometric mean2330≤ 126 MPN/100mL1749%
June 2026E. coli, MTEC-MF, weekly geometric mean8160≤ 284 MPN/100mL2773%
June 2026Phosphorus, total [as P], monthly average1.13≤ 1 mg/L13%
July 2026E. coli, MTEC-MF, monthly geometric mean622≤ 126 MPN/100mL394%
July 2026E. coli, MTEC-MF, weekly geometric mean1850≤ 284 MPN/100mL551%
July 2026Nitrogen, ammonia total [as N], monthly average2.56≤ 1.2 kg/d113%
July 2026Nitrogen, ammonia total [as N], monthly average7.7≤ 1.4 mg/L450%
July 2026Nitrogen, ammonia total [as N], weekly maximum12.9≤ 2.25 mg/L473%
July 2026Nitrogen, ammonia total [as N], weekly maximum4.83≤ 2 kg/d142%
July 2026Phosphorus, total [as P], monthly average.979≤ .871 kg/d12%
July 2026Phosphorus, total [as P], monthly average2.33≤ 1 mg/L133%
July 2026Phosphorus, total [as P], weekly maximum2.33≤ 1.5 mg/L55%
August 2026BOD, carbonaceous [5 day, 20 C], weekly maximum17≤ 13.1 kg/d30%
August 2026E. coli, MTEC-MF, weekly geometric mean738≤ 284 MPN/100mL160%
August 2026Nitrogen, ammonia total [as N], monthly average4.43≤ 1.2 kg/d269%
August 2026Nitrogen, ammonia total [as N], monthly average4.69≤ 1.4 mg/L235%
August 2026Nitrogen, ammonia total [as N], weekly maximum14.5≤ 2.25 mg/L544%
August 2026Nitrogen, ammonia total [as N], weekly maximum8.89≤ 2 kg/d345%
August 2026Phosphorus, total [as P], monthly average1.06≤ .871 kg/d22%
August 2026Phosphorus, total [as P], monthly average2.16≤ 1 mg/L116%
August 2026Phosphorus, total [as P], weekly maximum2.16≤ 1.5 mg/L44%
August 2026Solids, total suspended, weekly maximum19≤ 15.7 kg/d21%

Limits in force (114)

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≥ 7 mg/Lall year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendedweekly maximum≤ 18 mg/Lall year001
Solids, total suspendedmonthly average≤ 10.5 kg/dall year001
Solids, total suspendedweekly maximum≤ 15.7 kg/dall year001
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/LMar, Jun, Aug, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 2.25 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.2 kg/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.75 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 2 kg/dMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 2.62 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 average≤ 1 mg/Lall year001
Phosphorus, total [as P]weekly maximum≤ 1.5 mg/Lall year001
Phosphorus, total [as P]monthly average≤ .871 kg/dall year001
Phosphorus, total [as P]weekly maximum≤ 1.31 kg/dall year001
Cyanide, free-water plus wastewatersmonthly averagereport only (mg/L)Jun, Dec001
Cyanide, free-water plus wastewatersdaily maximumreport only (mg/L)Jun, Dec001
Nickel, total recoverablemonthly averagereport only (ug/L)Jun, Dec001
Nickel, total recoverabledaily maximumreport only (ug/L)Jun, Dec001
Zinc, total recoverablemonthly averagereport only (ug/L)Jun, Dec001
Zinc, total recoverabledaily maximumreport only (ug/L)Jun, Dec001
Cadmium, total recoverablemonthly averagereport only (ug/L)Jun, Dec001
Cadmium, total recoverabledaily maximumreport only (ug/L)Jun, Dec001
Lead, total recoverablemonthly averagereport only (ug/L)Jun, Dec001
Lead, total recoverabledaily maximumreport only (ug/L)Jun, Dec001
Chromium, total recoverablemonthly averagereport only (ug/L)Jun, Dec001
Chromium, total recoverabledaily maximumreport only (ug/L)Jun, Dec001
Copper, total recoverablemonthly averagereport only (ug/L)Jun, Dec001
Copper, total recoverabledaily maximumreport only (ug/L)Jun, Dec001
Chromium, hexavalent dissolved [as Cr]monthly averagereport only (ug/L)Jun, Dec001
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)Jun, Dec001
E. coli, MTEC-MFmonthly geometric mean≤ 126 MPN/100mLMay–Oct001
E. coli, MTEC-MFweekly geometric mean≤ 284 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
Chlorine, total residualdaily maximum≤ .038 mg/LMay–Oct001
Mercury, total low levelmonthly averagereport only (ng/L)Jun, Dec001
Mercury, total low leveldaily maximumreport only (ng/L)Jun, Dec001
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≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8.71 kg/dall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 13.1 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
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
Sludge waste from secondary clarifiersmonthly averagereport only (gal)Dec588
Sludge waste from secondary clarifiersdaily maximumreport only (gal)Dec588
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)Mar, Jun, Aug, Dec801
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec801
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec801
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec801
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec801
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec801
Phosphorus, total [as P]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec801
Phosphorus, total [as P]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec801
E. coli, MTEC-MFmonthly geometric meanreport only (MPN/100mL)Jun–Aug801
E. coli, MTEC-MFdaily maximumreport only (MPN/100mL)Jun–Aug801
Temperature, water deg. centigrademonthly averagereport only (deg C)Mar, Jun, Aug, Dec901
Temperature, water deg. centigradedaily maximumreport only (deg C)Mar, Jun, Aug, Dec901
pHdaily minimumreport only (SU)Mar, Jun, Aug, Dec901
pHdaily maximumreport only (SU)Mar, Jun, Aug, Dec901
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec901
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec901
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec901
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec901
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec901
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec901
Phosphorus, total [as P]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec901
Phosphorus, total [as P]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec901
Hardness, total [as CaCO3]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec901
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Mar, Jun, Aug, 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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Your permit document is the final word. As JSON: /api/v1/permits/OH0022209 · MCP: https://passage-data.com/mcp