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Cardinal Operating Company - Cardinal Plant

Electric Services, major discharger, Brilliant, Ohio. NPDES permit OH0012581, in force until Aug 31, 2030. Last 12 months: over a limit 4 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (14 values), outfall 006 form A monthly (14 values), outfall 008 form A monthly (14 values), outfall 019 form A monthly (12 values), outfall 024 form A monthly (13 values), outfall 601 form A monthly (18 values), and 6 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 138 reports late

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

Period endingOutfallParameterReportedLimitOver by
January 2026601Oil and grease, hexane extr method, daily maximum21≤ 20 mg/L5%
February 2026604Arsenic, total recoverable, monthly average11≤ 8 ug/L38%
February 2026604Selenium, total recoverable, monthly average64≤ 29 ug/L121%
April 2026604Oil and grease, hexane extr method, daily maximum38≤ 20 mg/L90%

Limits in force (169)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
Thermal Dischargemonthly average≤ 6340 MBTU/hrall year001
Thermal Dischargedaily maximum≤ 6340 MBTU/hrall year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Zinc, total recoverablemonthly averagereport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/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
Chlorine, total residualdaily maximum≤ .2 mg/Lall year001
Mercury, total low levelmonthly averagereport only (ng/L)all year001
Mercury, total low leveldaily maximumreport only (ng/L)all year001
Chlorination durationdaily maximum≤ 120 minall year001
Flow ratemonthly averagereport only (gal/d)all year006
Flow ratedaily maximumreport only (gal/d)all year006
pHdaily minimum≥ 6.5 SUall year006
pHdaily maximum≤ 9 SUall year006
Solids, total suspendedmonthly average≤ 12 mg/Lall year006
Solids, total suspendeddaily maximum≤ 18 mg/Lall year006
Solids, total suspendedmonthly average≤ .48 kg/dall year006
Solids, total suspendeddaily maximum≤ .73 kg/dall year006
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec006
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec006
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 1000 #/100mLJan, Feb, Mar, Apr, Nov, Dec006
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximum≤ 2000 #/100mLJan, Feb, Mar, Apr, Nov, Dec006
E. coli, MTEC-MFmonthly geometric mean≤ 126 MPN/100mLMay–Oct006
E. coli, MTEC-MFweekly geometric mean≤ 240 MPN/100mLMay–Oct006
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year006
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year006
BOD, carbonaceous [5 day, 20 C]monthly average≤ .4 kg/dall year006
BOD, carbonaceous [5 day, 20 C]daily maximum≤ .6 kg/dall year006
Flow ratemonthly averagereport only (gal/d)all year008
Flow ratedaily maximumreport only (gal/d)all year008
pHdaily minimum≥ 6.5 SUall year008
pHdaily maximum≤ 9 SUall year008
Solids, total suspendedmonthly average≤ 12 mg/Lall year008
Solids, total suspendeddaily maximum≤ 18 mg/Lall year008
Solids, total suspendedmonthly average≤ .72 kg/dall year008
Solids, total suspendeddaily maximum≤ 1.08 kg/dall year008
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 1000 #/100mLJan, Feb, Mar, Apr, Nov, Dec008
Coliform, fecal MF, MFC broth, 44.5 Cdaily maximum≤ 2000 #/100mLJan, Feb, Mar, Apr, Nov, Dec008
E. coli, MTEC-MFmonthly geometric mean≤ 126 MPN/100mLMay–Oct008
E. coli, MTEC-MFweekly geometric mean≤ 240 MPN/100mLMay–Oct008
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year008
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year008
BOD, carbonaceous [5 day, 20 C]monthly average≤ .6 kg/dall year008
BOD, carbonaceous [5 day, 20 C]daily maximum≤ .9 kg/dall year008
pHdaily minimumreport only (SU)Mar, Jun, Aug, Dec012
pHdaily maximumreport only (SU)Mar, Jun, Aug, Dec012
Solids, total suspendedmonthly averagereport only (mg/L)Mar, Jun, Aug, Dec012
Solids, total suspendeddaily maximumreport only (mg/L)Mar, Jun, Aug, Dec012
pHdaily minimumreport only (SU)all year019
pHdaily maximumreport only (SU)all year019
Solids, total suspendedmonthly averagereport only (mg/L)all year019
Solids, total suspendeddaily maximumreport only (mg/L)all year019
Oil and grease, hexane extr methodmonthly averagereport only (mg/L)all year019
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all year019
Hardness, total [as CaCO3]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec019
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec019
Arsenic, total recoverablemonthly averagereport only (ug/L)all year019
Arsenic, total recoverabledaily maximumreport only (ug/L)all year019
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year019
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year019
Mercury, total low levelmonthly average≤ 12 ng/Lall year019
Mercury, total low leveldaily maximum≤ 1700 ng/Lall year019
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)Mar, Jun, Aug, Dec019
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)Mar, Jun, Aug, Dec019
pHdaily minimum≥ 6.5 SUall year024
pHdaily maximum≤ 9 SUall year024
Solids, total suspendedmonthly average≤ 30 mg/Lall year024
Solids, total suspendeddaily maximum≤ 98.8 mg/Lall year024
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year024
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year024
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec024
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec024
Hardness, total [as CaCO3]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec024
Hardness, total [as CaCO3]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec024
Selenium, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec024
Selenium, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec024
Copper, total recoverablemonthly averagereport only (ug/L)all year024
Copper, total recoverabledaily maximumreport only (ug/L)all year024
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year024
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year024
Chlorine, total residualdaily maximum≤ .038 mg/Lall year024
Mercury, total low levelmonthly averagereport only (ng/L)all year024
Mercury, total low leveldaily maximumreport only (ng/L)all year024
pHdaily minimumreport only (SU)Mar, Jun, Aug, Dec026
pHdaily maximumreport only (SU)Mar, Jun, Aug, Dec026
Solids, total suspendedmonthly averagereport only (mg/L)Mar, Jun, Aug, Dec026
Solids, total suspendeddaily maximumreport only (mg/L)Mar, Jun, Aug, Dec026
pHdaily minimumreport only (SU)Mar, Jun, Aug, Dec027
pHdaily maximumreport only (SU)Mar, Jun, Aug, Dec027
Solids, total suspendedmonthly averagereport only (mg/L)Mar, Jun, Aug, Dec027
Solids, total suspendeddaily maximumreport only (mg/L)Mar, Jun, Aug, Dec027
Sludge waste from secondary clarifiersmonthly averagereport only (gal)Dec588
Sludge waste from secondary clarifiersdaily maximumreport only (gal)Dec588
pHdaily minimum≥ 6 SUall year601
pHdaily maximum≤ 9 SUall year601
Solids, total suspendedmonthly average≤ 30 mg/Lall year601
Solids, total suspendeddaily maximum≤ 100 mg/Lall year601
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year601
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year601
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year601
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year601
Arsenic, total recoverablemonthly averagereport only (ug/L)all year601
Arsenic, total recoverabledaily maximumreport only (ug/L)all year601
Selenium, total recoverablemonthly averagereport only (ug/L)all year601
Selenium, total recoverabledaily maximumreport only (ug/L)all year601
Zinc, total recoverablemonthly averagereport only (ug/L)all year601
Zinc, total recoverabledaily maximumreport only (ug/L)all year601
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year601
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year601
Mercury, total low levelmonthly averagereport only (ng/L)all year601
Mercury, total low leveldaily maximumreport only (ng/L)all year601
pHdaily minimum≥ 6 SUall year602
pHdaily maximum≤ 9 SUall year602
Solids, total suspendedmonthly average≤ 30 mg/Lall year602
Solids, total suspendeddaily maximum≤ 100 mg/Lall year602
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year602
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall 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
Arsenic, total recoverablemonthly averagereport only (ug/L)all year602
Arsenic, total recoverabledaily maximumreport only (ug/L)all year602
Selenium, total recoverablemonthly averagereport only (ug/L)all year602
Selenium, total recoverabledaily maximumreport only (ug/L)all year602
Boron, total recoverablemonthly averagereport only (ug/L)all year602
Boron, total recoverabledaily maximumreport only (ug/L)all year602
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year602
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year602
Mercury, total low levelmonthly averagereport only (ng/L)all year602
Mercury, total low leveldaily maximumreport only (ng/L)all year602
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year602
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)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
pHdaily minimum≥ 6 SUall year604
pHdaily maximum≤ 9 SUall year604
Solids, total suspendedmonthly average≤ 30 mg/Lall year604
Solids, total suspendeddaily maximum≤ 100 mg/Lall year604
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year604
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year604
Nitrite + Nitrate total [as N]monthly average≤ 3 mg/Lall year604
Nitrite + Nitrate total [as N]daily maximum≤ 4 mg/Lall year604
Arsenic, total recoverablemonthly average≤ 8 ug/Lall year604
Arsenic, total recoverabledaily maximum≤ 18 ug/Lall year604
Selenium, total recoverablemonthly average≤ 29 ug/Lall year604
Selenium, total recoverabledaily maximum≤ 70 ug/Lall year604
Zinc, total recoverablemonthly averagereport only (ug/L)all year604
Zinc, total recoverabledaily maximumreport only (ug/L)all year604
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year604
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year604
Mercury, total low levelmonthly average≤ 34 ng/Lall year604
Mercury, total low leveldaily maximum≤ 103 ng/Lall year604
Solids, total suspendedmonthly averagereport only (mg/L)Mar, Jun, Aug, Dec605
Solids, total suspendeddaily maximumreport only (mg/L)Mar, Jun, Aug, Dec605
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Mar, Jun, Aug, Dec605
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Mar, Jun, Aug, Dec605
Zinc, total recoverablemonthly averagereport only (ug/L)all year800
Zinc, total recoverabledaily maximumreport only (ug/L)all year800
Mercury, total low levelmonthly averagereport only (ng/L)all year800
Mercury, total low leveldaily maximumreport only (ng/L)all year800
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year801
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year801
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year802
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year802
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year802
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year802

New limits from Jan 1, 2030

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Arsenic, total recoverable, daily maximum outfall 01911 ug/Lnew7.9 ug/L (11 values)0.718×
Arsenic, total recoverable, monthly average outfall 0198 ug/Lnew7.9 ug/L (11 values)0.988×
Mercury, total low level, daily maximum outfall 019788 ng/Ltighter2.06 ng/L (7 values)0.00261×
Copper, total recoverable, daily maximum outfall 02461 ug/Lnew25 ug/L (8 values)0.41×
Number of Events, daily maximum outfall 6030 #new——
Number of Events, daily maximum outfall 6040 #new——

How strict are these limits?

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

Same industry: the 31 Electric Services permits in Ohio.

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

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