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Hiram WWTP

Sewage treatment plant, Hiram, Ohio. NPDES permit OH0025801, in force until Jul 31, 2029. Last 12 months: over a limit 12 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (36 values), outfall 300 form A monthly (2 values), outfall 601 form A monthly (6 values), outfall 801 form A monthly (13 values), outfall 901 form A monthly (13 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
13 values over a limit, 0 required values missing, 0 of 67 reports late

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

Period endingParameterReportedLimitOver by
October 2025Copper, total recoverable, daily maximum48≤ 34 ug/L41%
October 2025Copper, total recoverable, monthly average32≤ 21 ug/L52%
December 2025Copper, total recoverable, monthly average26≤ 21 ug/L24%
January 2026Copper, total recoverable, daily maximum38≤ 34 ug/L12%
January 2026Copper, total recoverable, monthly average.016≤ .0159 kg/d1%
January 2026Copper, total recoverable, monthly average31≤ 21 ug/L48%
April 2026Copper, total recoverable, daily maximum.037≤ .0258 kg/d43%
April 2026Copper, total recoverable, daily maximum36≤ 34 ug/L6%
April 2026Copper, total recoverable, monthly average.016≤ .0159 kg/d1%
April 2026Copper, total recoverable, monthly average23≤ 21 ug/L10%
August 2026Copper, total recoverable, monthly average25≤ 21 ug/L19%
August 2026Phosphorus, total [as P], monthly average1.23≤ 1 mg/L23%

Limits in force (113)

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
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly maximum≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 22.8 kg/dall year001
Solids, total suspendedweekly maximum≤ 34.1 kg/dall year001
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/LMar, Jun, Sep, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.6 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 2.3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 2.4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly maximum≤ 3.45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.22 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≤ 1.82 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≤ .76 kg/dall year001
Phosphorus, total [as P]weekly maximum≤ 1.14 kg/dall year001
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 average≤ 21 ug/Lall year001
Copper, total recoverabledaily maximum≤ 34 ug/Lall year001
Copper, total recoverablemonthly average≤ .0159 kg/dall year001
Copper, total recoverabledaily maximum≤ .0258 kg/dall year001
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
Mercury, total low levelmonthly average≤ 12 ng/LJun, Dec001
Mercury, total low leveldaily maximum≤ 1700 ng/LJun, Dec001
Mercury, total low levelmonthly average≤ .00001 kg/dJun, Dec001
Mercury, total low leveldaily maximum≤ .00129 kg/dJun, Dec001
Cyanide, free availablemonthly averagereport only (ug/L)Jun, Dec001
Cyanide, free availabledaily maximumreport only (ug/L)Jun, Dec001
Solids, total dissolved- 180 deg. Cmonthly average≤ 1515 mg/Lall year001
Solids, total dissolved- 180 deg. Cmonthly average≤ 1147 kg/dall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 19 kg/dall year001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 30.3 kg/dall year001
Overflowsmonthly averagereport only (occur/mo)all year300
Overflowsdaily maximumreport only (occur/mo)all year300
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
Copper, total recoverablemonthly averagereport only (ug/L)all year601
Copper, total recoverabledaily maximumreport only (ug/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
Solids, total suspendedmonthly averagereport only (mg/L)all year602
Solids, total suspendeddaily maximumreport only (mg/L)all year602
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year602
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year602
Chlorine, total residualdaily maximumreport only (mg/L)May–Oct602
Bypass Volumemonthly averagereport only (Mgal)all year602
Bypass Volumedaily maximumreport only (Mgal)all year602
Overflowsmonthly averagereport only (occur/mo)all year602
Overflowsdaily maximumreport only (occur/mo)all year602
Overflow volume [SS0 volume, CSO volume]monthly averagereport only (Mgal)all year602
Overflow volume [SS0 volume, CSO volume]daily maximumreport only (Mgal)all year602
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year602
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year602
Duration of dischargemonthly averagereport only (hr)all year602
Duration of dischargedaily maximumreport only (hr)all year602
Temperature, water deg. centigrademonthly averagereport only (deg C)Mar, Jun, Sep, Dec801
Temperature, water deg. centigradedaily maximumreport only (deg C)Mar, Jun, Sep, Dec801
Oxygen, dissolved [DO]daily minimumreport only (mg/L)Mar, Jun, Sep, Dec801
pHdaily minimumreport only (SU)Mar, Jun, Sep, Dec801
pHdaily maximumreport only (SU)Mar, Jun, Sep, Dec801
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec801
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec801
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec801
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec801
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec801
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec801
Phosphorus, total [as P]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec801
Phosphorus, total [as P]daily maximumreport only (mg/L)Mar, Jun, Sep, 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, Sep, Dec901
Temperature, water deg. centigradedaily maximumreport only (deg C)Mar, Jun, Sep, Dec901
Oxygen, dissolved [DO]daily minimumreport only (mg/L)Mar, Jun, Sep, Dec901
pHdaily minimumreport only (SU)Mar, Jun, Sep, Dec901
pHdaily maximumreport only (SU)Mar, Jun, Sep, Dec901
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec901
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec901
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec901
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec901
Phosphorus, total [as P]monthly averagereport only (mg/L)Mar, Jun, Sep, Dec901
Phosphorus, total [as P]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec901
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

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/OH0025801 · MCP: https://passage-data.com/mcp