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Swanton, Village of

Sewage treatment plant, Swanton, Ohio. NPDES permit OH0020524, in force until Sep 30, 2027. Last 12 months: over a limit 25 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (38 values), outfall 300 form A monthly (2 values), outfall 601 form A monthly (8 values), outfall 801 form A monthly (5 values), outfall 901 form A monthly (5 values)
Renewal application due
Apr 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 0 of 183 reports late

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

All 25 values over a limit
Period endingParameterReportedLimitOver by
October 2025E. coli, MTEC-MF, weekly geometric mean2400≤ 284 MPN/100mL745%
October 2025Mercury, total low level, monthly average15.2≤ 4.75 ng/L220%
October 2025Nitrogen, ammonia total [as N], monthly average5.88≤ 2 mg/L194%
October 2025Nitrogen, ammonia total [as N], weekly maximum18.4≤ 3 mg/L513%
October 2025Phosphorus, total [as P], monthly average1.16≤ 1 mg/L16%
October 2025Phosphorus, total [as P], weekly maximum1.86≤ 1.5 mg/L24%
October 2025pH, minimum, daily minimum4.52≥ 6.5 SU—
February 2026BOD, carbonaceous [5 day, 20 C], monthly average11≤ 10 mg/L10%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average100≤ 94.7 kg/d6%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average19≤ 10 mg/L90%
April 2026BOD, carbonaceous [5 day, 20 C], weekly maximum190≤ 142 kg/d34%
April 2026BOD, carbonaceous [5 day, 20 C], weekly maximum34≤ 15 mg/L127%
April 2026Mercury, total low level, monthly average.0000296≤ .000017 kg/d74%
April 2026Solids, total suspended, monthly average16≤ 12 mg/L33%
April 2026Solids, total suspended, weekly maximum24≤ 18 mg/L33%
April 2026Solids, total suspended, weekly maximum240≤ 171 kg/d40%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average13≤ 10 mg/L30%
May 2026BOD, carbonaceous [5 day, 20 C], weekly maximum21≤ 15 mg/L40%
June 2026Chlorine, total residual, daily maximum.1≤ .011 mg/L809%
June 2026Chlorine, total residual, daily maximum.25≤ .038 kg/d558%
June 2026pH, minimum, daily minimum6.35≥ 6.5 SU—
July 2026BOD, carbonaceous [5 day, 20 C], monthly average20≤ 10 mg/L100%
July 2026BOD, carbonaceous [5 day, 20 C], weekly maximum47≤ 15 mg/L213%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average25.9≤ 10 mg/L159%
August 2026BOD, carbonaceous [5 day, 20 C], weekly maximum56.5≤ 15 mg/L277%

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≥ 5 mg/Lall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendedweekly maximum≤ 18 mg/Lall year001
Solids, total suspendedmonthly average≤ 114 kg/dall year001
Solids, total suspendedweekly maximum≤ 171 kg/dall year001
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 5.9 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 3 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 8.85 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 19 kg/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 55.9 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 28.4 kg/dMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 83.8 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≤ 9.47 kg/dall year001
Phosphorus, total [as P]weekly maximum≤ 14.2 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
Copper, total recoverablemonthly averagereport only (ug/L)Jun, Dec001
Copper, total recoverabledaily 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≤ .011 mg/LMay–Oct001
Chlorine, total residualdaily maximum≤ .038 kg/dMay–Oct001
Mercury, total low levelmonthly average≤ 4.75 ng/Lall year001
Mercury, total low leveldaily maximum≤ 1700 ng/Lall year001
Mercury, total low levelmonthly average≤ .000017 kg/dall year001
Mercury, total low leveldaily maximum≤ .0059 kg/dall year001
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≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 94.7 kg/dall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 142 kg/dall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
E. coli, MTEC-MFmonthly geometric meanreport only (MPN/100mL)May–Oct002
E. coli, MTEC-MFdaily maximumreport only (MPN/100mL)May–Oct002
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year002
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year002
Bypass valvemonthly averagereport only (occur/mo)all year002
Bypass valvedaily maximumreport only (occur/mo)all year002
Bypass of treatmentmonthly averagereport only (hr/mo)all year002
Bypass of treatmentdaily maximumreport only (hr/mo)all year002
Overflowsmonthly averagereport only (occur/mo)all year008
Overflowsdaily maximumreport only (occur/mo)all year008
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year008
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year008
Overflowsmonthly averagereport only (occur/mo)all year013
Overflowsdaily maximumreport only (occur/mo)all year013
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year013
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year013
Overflowsmonthly averagereport only (occur/mo)all year016
Overflowsdaily maximumreport only (occur/mo)all year016
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year016
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year016
Overflowsmonthly averagereport only (occur/mo)all year018
Overflowsdaily maximumreport only (occur/mo)all year018
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year018
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year018
Overflowsmonthly averagereport only (occur/mo)all year019
Overflowsdaily maximumreport only (occur/mo)all year019
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year019
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year019
Overflowsmonthly averagereport only (occur/mo)all year020
Overflowsdaily maximumreport only (occur/mo)all year020
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year020
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year020
Overflowsmonthly averagereport only (occur/mo)all year024
Overflowsdaily maximumreport only (occur/mo)all year024
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year024
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year024
Overflowsmonthly averagereport only (occur/mo)all year027
Overflowsdaily maximumreport only (occur/mo)all year027
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year027
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year027
Overflowsmonthly averagereport only (occur/mo)all year028
Overflowsdaily maximumreport only (occur/mo)all year028
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year028
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year028
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 waste from secondary clarifiersmonthly averagereport only (gal)Dec588
Sludge waste from secondary clarifiersdaily maximumreport only (gal)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
Mercury, total low levelmonthly averagereport only (ng/L)all year601
Mercury, total low leveldaily maximumreport only (ng/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)Mar, Jun, Aug, Dec801
Nitrogen, ammonia total [as N]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)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)Mar, Jun, Aug, Dec901
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec901
Cyanide, total [as CN]monthly averagereport only (mg/L)Jun, Dec901
Cyanide, total [as CN]daily maximumreport only (mg/L)Jun, Dec901
Hardness, total [as CaCO3]monthly averagereport only (mg/L)Jun, Dec901
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Jun, Dec901
Nickel, total recoverablemonthly averagereport only (ug/L)Jun, Dec901
Nickel, total recoverabledaily maximumreport only (ug/L)Jun, Dec901
Zinc, total recoverablemonthly averagereport only (ug/L)Jun, Dec901
Zinc, total recoverabledaily maximumreport only (ug/L)Jun, Dec901
Cadmium, total recoverablemonthly averagereport only (ug/L)Jun, Dec901
Cadmium, total recoverabledaily maximumreport only (ug/L)Jun, Dec901
Lead, total recoverablemonthly averagereport only (ug/L)Jun, Dec901
Lead, total recoverabledaily maximumreport only (ug/L)Jun, Dec901
Chromium, total recoverablemonthly averagereport only (ug/L)Jun, Dec901
Chromium, total recoverabledaily maximumreport only (ug/L)Jun, Dec901
Copper, total recoverablemonthly averagereport only (ug/L)Jun, Dec901
Copper, total recoverabledaily maximumreport only (ug/L)Jun, Dec901
Chromium, hexavalent dissolved [as Cr]monthly averagereport only (ug/L)Jun, Dec901
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)Jun, Dec901
E. coli, MTEC-MFmonthly geometric meanreport only (MPN/100mL)Jun, Aug901
E. coli, MTEC-MFdaily maximumreport only (MPN/100mL)Jun, Aug901
Mercury, total low levelmonthly averagereport only (ng/L)Jun, Dec901
Mercury, total low leveldaily maximumreport only (ng/L)Jun, Dec901

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/OH0020524 · MCP: https://passage-data.com/mcp