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City of Mansfield WWTP

Sewage treatment plant, major discharger, Mansfield, Ohio. NPDES permit OH0026328, in force until Mar 31, 2030. Last 12 months: over a limit 5 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (12 values), outfall 002 form A monthly (38 values), outfall 300 form A monthly (2 values), outfall 581 form A monthly (22 values), outfall 601 form A monthly (12 values), outfall 603 form A monthly (2 values), and 2 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 7 of 94 reports late

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

Period endingParameterReportedLimitOver by
October 2025E. coli, MTEC-MF, monthly geometric mean352.94≤ 126 MPN/100mL180%
October 2025E. coli, MTEC-MF, weekly geometric mean634.26≤ 284 MPN/100mL123%
April 2026pH, minimum, daily minimum6.12≥ 6.5 SU—
July 2026E. coli, MTEC-MF, monthly geometric mean135.9≤ 126 MPN/100mL8%
July 2026E. coli, MTEC-MF, weekly geometric mean341.88≤ 284 MPN/100mL20%

Limits in force (184)

ParameterStatisticLimitMonthsOutfall
Solids, total suspendedmonthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 12 mg/LMay–Oct001
Solids, total suspendedweekly maximum≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly maximum≤ 18 mg/LMay–Oct001
Solids, total suspendedmonthly average≤ 1140 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 546 kg/dMay–Oct001
Solids, total suspendedweekly maximum≤ 1820 kg/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly maximum≤ 818 kg/dMay–Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all 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
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 15 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 455 kg/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1140 kg/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 682 kg/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 1820 kg/dJan, Feb, Mar, Apr, Nov, Dec001
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≥ 5 mg/Lall year002
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year002
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LMay–Oct002
Nitrogen, ammonia total [as N]monthly average≤ 4.4 mg/LJan, Feb, Mar, Apr, Nov, Dec002
Nitrogen, ammonia total [as N]weekly maximum≤ 3.5 mg/LMay–Oct002
Nitrogen, ammonia total [as N]weekly maximum≤ 6.6 mg/LJan, Feb, Mar, Apr, Nov, Dec002
Nitrogen, ammonia total [as N]monthly average≤ 77.3 kg/dMay–Oct002
Nitrogen, ammonia total [as N]monthly average≤ 200 kg/dJan, Feb, Mar, Apr, Nov, Dec002
Nitrogen, ammonia total [as N]weekly maximum≤ 159 kg/dMay–Oct002
Nitrogen, ammonia total [as N]weekly maximum≤ 300 kg/dJan, Feb, Mar, Apr, Nov, Dec002
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year002
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year002
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year002
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year002
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year002
Phosphorus, total [as P]weekly maximum≤ 1.5 mg/Lall year002
Phosphorus, total [as P]monthly average≤ 45.5 kg/dall year002
Phosphorus, total [as P]weekly maximum≤ 68.2 kg/dall year002
Phosphate, ortho, dissolved [as P]monthly averagereport only (mg/L)all year002
Phosphate, ortho, dissolved [as P]daily maximumreport only (mg/L)all year002
Selenium, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec002
Selenium, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec002
Nickel, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec002
Nickel, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec002
Zinc, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec002
Zinc, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec002
Cadmium, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec002
Cadmium, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec002
Lead, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec002
Lead, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec002
Chromium, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec002
Chromium, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec002
Copper, total recoverablemonthly averagereport only (ug/L)all year002
Copper, total recoverabledaily maximumreport only (ug/L)all year002
Chromium, hexavalent dissolved [as Cr]monthly averagereport only (ug/L)Mar, Jun, Aug, Dec002
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)Mar, Jun, Aug, Dec002
E. coli, MTEC-MFmonthly geometric mean≤ 126 MPN/100mLMay–Oct002
E. coli, MTEC-MFweekly geometric mean≤ 284 MPN/100mLMay–Oct002
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ 5.3 ug/Lall year002
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 1470 ug/Lall year002
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ .24 kg/dall year002
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 66.8 kg/dall year002
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 residualmonthly average≤ .014 mg/LMay–Oct002
Chlorine, total residualdaily maximum≤ .023 mg/LMay–Oct002
Mercury, total low levelmonthly averagereport only (ng/L)all year002
Mercury, total low leveldaily maximumreport only (ng/L)all year002
Cyanide, free availablemonthly averagereport only (ug/L)all year002
Cyanide, free availabledaily maximumreport only (ug/L)all year002
Toxicity [acute], Ceriodaphnia dubiamonthly averagereport only (tox acute)Feb, Aug002
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (tox acute)Feb, Aug002
Toxicity [chronic], Ceriodaphnia dubiamonthly averagereport only (tox chronic)Feb, Aug002
Toxicity [chronic], Ceriodaphnia dubiadaily maximumreport only (tox chronic)Feb, Aug002
Toxicity [acute], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox acute)Feb, May, Aug, Nov002
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox acute)Feb, May, Aug, Nov002
Toxicity [chronic], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox chronic)Feb, May, Aug, Nov002
Toxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox chronic)Feb, May, Aug, Nov002
pH, maximumdaily maximum≤ 9 SUall year002
pH, minimumdaily minimum≥ 6.5 SUall year002
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year002
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year002
Overflowsmonthly averagereport only (occur/mo)all year300
Overflowsdaily maximumreport only (occur/mo)all year300
Nitrogen, ammonia in bottom depositsmonthly averagereport only (mg/kg)Mar, Jun, Sep, Dec581
Nitrogen, ammonia in bottom depositsdaily maximumreport only (mg/kg)Mar, Jun, Sep, Dec581
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/kg)Mar, Jun, Sep, Dec581
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/kg)Mar, Jun, Sep, Dec581
Phosphorous, total, in bottom depositsmonthly averagereport only (mg/kg)Mar, Jun, Sep, Dec581
Phosphorous, total, in bottom depositsdaily maximumreport only (mg/kg)Mar, Jun, Sep, Dec581
Potassium, in bottom depositsmonthly averagereport only (mg/kg)Mar, Jun, Sep, Dec581
Potassium, in bottom depositsdaily maximumreport only (mg/kg)Mar, Jun, Sep, Dec581
Arsenic, dry weightdaily maximum≤ 75 mg/kgMar, Jun, Sep, Dec581
Cadmium, in bottom deposits [dry wgt]daily maximum≤ 85 mg/kgMar, Jun, Sep, Dec581
Copper in bottom deposits [dry wgt]daily maximum≤ 4300 mg/kgMar, Jun, Sep, Dec581
Lead, total dry weight [as Pb]daily maximum≤ 840 mg/kgMar, Jun, Sep, Dec581
Nickel, tot in bottom deposits [dry wgt]daily maximum≤ 420 mg/kgMar, Jun, Sep, Dec581
Zinc in bottom deposits [dry wgt]daily maximum≤ 7500 mg/kgMar, Jun, Sep, Dec581
Selenium, dry weightdaily maximum≤ 100 mg/kgMar, Jun, Sep, Dec581
Fecal coliformdaily maximum≤ 2000000 MPN/gMar, Jun, Sep, Dec581
Biosolids weight indluding admixturesmonthly averagereport only (dry ton)Mar, Jun, Sep, Dec581
Biosolids weight indluding admixturesdaily maximumreport only (dry ton)Mar, Jun, Sep, Dec581
Sludge weight, drymonthly averagereport only (dry ton)Mar, Jun, Sep, Dec581
Sludge weight, drydaily maximumreport only (dry ton)Mar, Jun, Sep, Dec581
Mercury, tot in bot deposits [dry wgt]daily maximum≤ 57 mg/kgMar, Jun, Sep, Dec581
Molybdenum, sludge, total, dry weight [as Mo]daily maximum≤ 75 mg/kgMar, Jun, Sep, 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
Solids, total suspendedmonthly averagereport only (mg/L)all year601
Solids, total suspendeddaily 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)Mar, Jun, Aug, Dec601
Zinc, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec601
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)all year601
Copper, total recoverabledaily maximumreport only (ug/L)all year601
Chromium, hexavalent dissolved [as Cr]monthly averagereport only (ug/L)Mar, Jun, Aug, Dec601
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)Mar, Jun, Aug, Dec601
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)Mar, Jun, Aug, Dec601
Mercury, total low leveldaily maximumreport only (ng/L)Mar, Jun, Aug, Dec601
pH, maximumdaily maximumreport only (SU)all year601
pH, minimumdaily minimumreport only (SU)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
Solids, total suspendedmonthly averagereport only (mg/L)all year602
Solids, total suspendedweekly maximumreport only (mg/L)all year602
Phosphorus, total [as P]monthly averagereport only (mg/L)all year602
Phosphorus, total [as P]daily maximumreport only (mg/L)all year602
Bypass Volumemonthly averagereport only (Mgal)all year602
Bypass Volumedaily maximumreport only (Mgal)all year602
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year602
BOD, carbonaceous [5 day, 20 C]weekly maximumreport only (mg/L)all year602
Bypass valvemonthly averagereport only (occur/mo)all year602
Bypass valvedaily maximumreport only (occur/mo)all year602
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year603
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year603
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
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 (%)Feb, Aug801
%Effect Static Renewal 48Hr Acute Ceriodaphnia dubiadaily maximumreport only (%)Feb, Aug801
%Effect Static Renewal 96Hr Acute Pimephales promelasmonthly averagereport only (%)Feb, May, Aug, Nov801
%Effect Static Renewal 96Hr Acute Pimephales promelasdaily maximumreport only (%)Feb, May, Aug, Nov801
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly averagereport only (%)Feb, Aug801
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximumreport only (%)Feb, Aug801
%Effect Static Renewal 7Day Chronic Pimephales promelasmonthly averagereport only (%)Feb, May, Aug, Nov801
%Effect Static Renewal 7Day Chronic Pimephales promelasdaily maximumreport only (%)Feb, May, Aug, Nov801
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
E. coli, MTEC-MFmonthly geometric meanreport only (MPN/100mL)Jun–Aug901
E. coli, MTEC-MFdaily maximumreport only (MPN/100mL)Jun–Aug901

New limits from Apr 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Toxicity [acute], Pimephales promelas [Fathead Minnow], daily maximum1 tox acute (Feb, May, Aug, Nov)new——
Toxicity [chronic], Pimephales promelas [Fathead Minnow], monthly average1.22 tox chronic (Feb, May, Aug, Nov)new——

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0026328 · MCP: https://passage-data.com/mcp