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TimkenSteel Corp. - Canton WWTP

Blast Furnaces And Steel Mills, major discharger, Canton, Ohio. NPDES permit OH0004219, in force until Mar 31, 2029. Last 12 months: over a limit 3 times (last January 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (58 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025Lead, total recoverable, monthly average34≤ 32 ug/L6%
December 2025Silver total recoverable, monthly average1.4≤ 1.3 ug/L8%
January 2026Silver total recoverable, monthly average1.7≤ 1.3 ug/L31%

Limits in force (58)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 133 kg/dall year
Solids, total suspendeddaily maximum≤ 397 kg/dall year
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year
Oil and grease, hexane extr methodmonthly average≤ 31.8 kg/dall year
Oil and grease, hexane extr methoddaily maximum≤ 133 kg/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Fluoride, total [as F]monthly averagereport only (mg/L)all year
Fluoride, total [as F]daily maximumreport only (mg/L)all year
Selenium, total recoverablemonthly averagereport only (ug/L)all year
Selenium, total recoverabledaily maximumreport only (ug/L)all year
Nickel, total recoverablemonthly average≤ 171 ug/Lall year
Nickel, total recoverabledaily maximum≤ 459 ug/Lall year
Nickel, total recoverablemonthly average≤ 2.27 kg/dall year
Nickel, total recoverabledaily maximum≤ 6.08 kg/dall year
Silver total recoverablemonthly average≤ 1.3 ug/Lall year
Silver total recoverabledaily maximum≤ 17 ug/Lall year
Silver total recoverablemonthly average≤ .017 kg/dall year
Silver total recoverabledaily maximum≤ .226 kg/dall year
Zinc, total recoverablemonthly average≤ 211 ug/Lall year
Zinc, total recoverabledaily maximum≤ 393 ug/Lall year
Zinc, total recoverablemonthly average≤ 2.8 kg/dall year
Zinc, total recoverabledaily maximum≤ 5.21 kg/dall year
Lead, total recoverablemonthly average≤ 32 ug/Lall year
Lead, total recoverabledaily maximum≤ 161 ug/Lall year
Lead, total recoverablemonthly average≤ .42 kg/dall year
Lead, total recoverabledaily maximum≤ 2.13 kg/dall year
Chromium, total recoverablemonthly average≤ 108 ug/Lall year
Chromium, total recoverabledaily maximum≤ 319 ug/Lall year
Chromium, total recoverablemonthly average≤ 1.43 kg/dall year
Chromium, total recoverabledaily maximum≤ 4.23 kg/dall year
Copper, total recoverablemonthly average≤ 30 ug/Lall year
Copper, total recoverabledaily maximum≤ 52 ug/Lall year
Copper, total recoverablemonthly average≤ .397 kg/dall year
Copper, total recoverabledaily maximum≤ .689 kg/dall year
Oxidants, total residualdaily maximum≤ .0024 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximumreport only (mg/L)all year
Mercury, total low levelmonthly averagereport only (ng/L)Mar, Sep
Mercury, total low leveldaily maximumreport only (ng/L)Mar, Sep
pH Range Excursion, Maximum Durationdaily maximumreport only (min)all year
Toxicity [acute], Ceriodaphnia dubiamonthly averagereport only (tox acute)Sep
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (tox acute)Sep
Toxicity [chronic], Ceriodaphnia dubiamonthly averagereport only (tox chronic)Sep
Toxicity [chronic], Ceriodaphnia dubiadaily maximumreport only (tox chronic)Sep
pH, maximumdaily maximumreport only (SU)all year
pH, minimumdaily minimumreport only (SU)all year
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year
Organics, total toxic [TTO]daily maximum≤ 245 ug/Lall year
Organics, total toxic [TTO]daily maximum≤ 3.25 kg/dall year
pH range excursions, > 60 minutesdaily maximumreport only (occur/d)all year
pH range excursions, monthly total accumdaily maximum≤ 446 minall year

New limits from Apr 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Selenium, total recoverable, monthly average5 ug/Lnew18.5 ug/L (6 values)3.7×
Chlorine, total residual, daily maximum0.019 mg/Lnew——
Copper, total recoverable, daily maximum0.58 kg/dtighter0.12 kg/d (11 values)0.207×
Copper, total recoverable, daily maximum44 ug/Ltighter13 ug/L (11 values)0.295×
Copper, total recoverable, monthly average27 ug/Ltighter13 ug/L (11 values)0.481×
Copper, total recoverable, monthly average0.36 kg/dtighter0.12 kg/d (11 values)0.333×
Fluoride, total [as F], monthly average2.2 mg/Lnew2.1 mg/L (11 values)0.955×
Fluoride, total [as F], monthly average29.1 kg/dnew——
Lead, total recoverable, monthly average30 ug/Ltighter17 ug/L (11 values)0.567×
Lead, total recoverable, monthly average0.4 kg/dtighter0.13 kg/d (11 values)0.325×
Nickel, total recoverable, monthly average151 ug/Ltighter36 ug/L (11 values)0.238×
Nickel, total recoverable, monthly average2 kg/dtighter0.27 kg/d (11 values)0.135×
Selenium, total recoverable, daily maximum0.82 kg/dnew——
Selenium, total recoverable, daily maximum62 ug/Lnew18.5 ug/L (6 values)0.298×
Selenium, total recoverable, monthly average0.066 kg/dnew——
Silver total recoverable, daily maximum0.17 kg/dtighter0.0078 kg/d (8 values)0.0459×
Silver total recoverable, daily maximum13 ug/Ltighter0.895 ug/L (8 values)0.0688×
Zinc, total recoverable, daily maximum342 ug/Ltighter93 ug/L (11 values)0.272×
Zinc, total recoverable, daily maximum4.53 kg/dtighter0.8 kg/d (11 values)0.177×

How strict are these limits?

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

Same industry: the 56 Primary Metal Industries permits in Ohio.

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