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Blast Furnaces And Steel Mills, major discharger, Cleveland, Ohio. NPDES permit OH0000957, in force until Feb 28, 2031. Last 12 months: over a limit 4 times (last August 2026), 14 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| December 2025 | 008 | pH, daily maximum | 9.6 | ≤ 9 SU | — |
| December 2025 | 017 | Zinc, total [as Zn], daily maximum | 773.3 | ≤ 470 ug/L | 65% |
| March 2026 | 005 | Mercury, total low level, monthly average | 11.1 | ≤ 9.4 ng/L | 18% |
| August 2026 | 603 | Oil and grease, hexane extr method, daily maximum | 1980 | ≤ 672 kg/d | 195% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 001 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 001 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year | 001 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Sep | 001 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Sep | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 002 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar–May | 002 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar–May | 002 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar–May | 002 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar–May | 002 |
| Lead, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 002 |
| Lead, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 002 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar–May | 002 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar–May | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 tox acute | Mar, Jun, Sep, Dec | 002 |
| Toxicity [chronic], Ceriodaphnia dubia | monthly average | report only (tox chronic) | Mar, Jun, Sep, Dec | 002 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (tox chronic) | Mar, Jun, Sep, Dec | 002 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Sep | 002 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Sep | 002 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox chronic) | Sep | 002 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox chronic) | Sep | 002 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 002 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 004 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 004 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 004 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 004 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 004 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 004 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Sep | 004 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Sep | 004 |
| Toxicity [acute], Ceriodaphnia dubia | monthly average | report only (tox acute) | Sep | 004 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | Sep | 004 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Sep | 004 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Sep | 004 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 005 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 005 |
| pH | daily minimum | ≥ 6.5 SU | all year | 005 |
| pH | daily maximum | ≤ 9 SU | all year | 005 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 005 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 005 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 005 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 005 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Chlorine, total residual | monthly average | ≤ .015 mg/L | all year | 005 |
| Chlorine, total residual | daily maximum | ≤ .022 mg/L | all year | 005 |
| Mercury, total low level | monthly average | ≤ 9.4 ng/L | Mar, Jun, Sep, Dec | 005 |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | Mar, Jun, Sep, Dec | 005 |
| Mercury, total low level | monthly average | ≤ .0021 kg/d | Mar, Jun, Sep, Dec | 005 |
| Mercury, total low level | daily maximum | ≤ .291 kg/d | Mar, Jun, Sep, Dec | 005 |
| Cyanide, free available | monthly average | report only (ug/L) | all year | 005 |
| Cyanide, free available | daily maximum | report only (ug/L) | all year | 005 |
| Toxicity [acute], Ceriodaphnia dubia | monthly average | report only (tox acute) | Sep | 005 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | Sep | 005 |
| Toxicity [chronic], Ceriodaphnia dubia | monthly average | report only (tox chronic) | Sep | 005 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (tox chronic) | Sep | 005 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Sep | 005 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Sep | 005 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox chronic) | Sep | 005 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox chronic) | Sep | 005 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 005 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 005 |
| pH | daily minimum | report only (SU) | Mar, Jun, Sep, Dec | 009 |
| pH | daily maximum | report only (SU) | Mar, Jun, Sep, Dec | 009 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 009 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 009 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 009 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 009 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 009 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 009 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 009 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 009 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 009 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 009 |
| Naphthalene | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 009 |
| Naphthalene | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 009 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 009 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 009 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 010 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 010 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 010 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 010 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 010 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 010 |
| Cyanide, free available | monthly average | report only (ug/L) | all year | 010 |
| Cyanide, free available | daily maximum | report only (ug/L) | all year | 010 |
| Bypass Volume | monthly average | report only (Mgal) | all year | 010 |
| Bypass Volume | daily maximum | report only (Mgal) | all year | 010 |
| Bypass of treatment | monthly average | report only (hr/mo) | all year | 010 |
| Bypass of treatment | daily maximum | report only (hr/mo) | all year | 010 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 011 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 011 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 011 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 011 |
| Cyanide, free available | monthly average | report only (ug/L) | all year | 011 |
| Cyanide, free available | daily maximum | report only (ug/L) | all year | 011 |
| Bypass Volume | monthly average | report only (Mgal) | all year | 011 |
| Bypass Volume | daily maximum | report only (Mgal) | all year | 011 |
| Bypass of treatment | monthly average | report only (hr/mo) | all year | 011 |
| Bypass of treatment | daily maximum | report only (hr/mo) | all year | 011 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 014 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 014 |
| pH | daily minimum | ≥ 6.5 SU | all year | 014 |
| pH | daily maximum | ≤ 9 SU | all year | 014 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 014 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 014 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 014 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 014 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 014 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 014 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 014 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 014 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Chlorine, total residual | monthly average | ≤ .015 mg/L | all year | 014 |
| Chlorine, total residual | daily maximum | ≤ .021 mg/L | all year | 014 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Sep, Dec | 014 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Sep, Dec | 014 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 017 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 017 |
| Solids, total suspended | monthly average | ≤ 100 kg/d | all year | 017 |
| Solids, total suspended | daily maximum | ≤ 296 kg/d | all year | 017 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 017 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 017 |
| Oil and grease, hexane extr method | monthly average | ≤ 15.4 kg/d | all year | 017 |
| Oil and grease, hexane extr method | daily maximum | ≤ 22.2 kg/d | all year | 017 |
| Zinc, total recoverable | daily maximum | ≤ 810 ug/L | all year | 017 |
| Zinc, total recoverable | monthly average | ≤ 1.14 kg/d | all year | 017 |
| Zinc, total recoverable | daily maximum | ≤ 2.48 kg/d | all year | 017 |
| Lead, total recoverable | monthly average | ≤ 76 ug/L | all year | 017 |
| Lead, total recoverable | monthly average | ≤ .23 kg/d | all year | 017 |
| Lead, total recoverable | daily maximum | ≤ 2.28 kg/d | all year | 017 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 017 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 017 |
| Chlorine, total residual | monthly average | ≤ .015 mg/L | all year | 017 |
| Chlorine, total residual | daily maximum | ≤ .021 mg/L | all year | 017 |
| Mercury, total low level | monthly average | ≤ 4.27 ng/L | Mar, Jun, Sep, Dec | 017 |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | Mar, Jun, Sep, Dec | 017 |
| Mercury, total low level | monthly average | ≤ .000013 kg/d | Mar, Jun, Sep, Dec | 017 |
| Mercury, total low level | daily maximum | ≤ .00428 kg/d | Mar, Jun, Sep, Dec | 017 |
| Cyanide, free available | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 017 |
| Cyanide, free available | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 017 |
| Toxicity [acute], Ceriodaphnia dubia | monthly average | report only (tox acute) | Sep | 017 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | Sep | 017 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Sep | 017 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Sep | 017 |
| pH, maximum | daily maximum | report only (SU) | all year | 017 |
| pH, minimum | daily minimum | report only (SU) | all year | 017 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 017 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 017 |
| pH range excursions, > 60 minutes | daily maximum | ≤ 0 occur/d | all year | 017 |
| pH range excursions, monthly total accum | daily maximum | ≤ 446 min | all year | 017 |
| pH | daily minimum | report only (SU) | Mar, Jun, Sep, Dec | 019 |
| pH | daily maximum | report only (SU) | Mar, Jun, Sep, Dec | 019 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 019 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 019 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 019 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 019 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 019 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 019 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 019 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 019 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 019 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 019 |
| pH | daily minimum | report only (SU) | Mar, Jun, Sep, Dec | 021 |
| pH | daily maximum | report only (SU) | Mar, Jun, Sep, Dec | 021 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 021 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 021 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 021 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 021 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 021 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 021 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 021 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 021 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 021 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 021 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 022 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 022 |
| pH | daily minimum | ≥ 6.5 SU | all year | 022 |
| pH | daily maximum | ≤ 9 SU | all year | 022 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 022 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 022 |
| Fluoride, total [as F] | monthly average | report only (mg/L) | all year | 022 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 022 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar–May | 022 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar–May | 022 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar–May | 022 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar–May | 022 |
| Lead, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 022 |
| Lead, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 022 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 022 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 022 |
| Mercury, total low level | monthly average | ≤ 2.43 ng/L | Mar, Jun, Sep, Dec | 022 |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | Mar, Jun, Sep, Dec | 022 |
| Mercury, total low level | monthly average | ≤ .000021 kg/d | Mar, Jun, Sep, Dec | 022 |
| Mercury, total low level | daily maximum | ≤ .015 kg/d | Mar, Jun, Sep, Dec | 022 |
| Toxicity [acute], Ceriodaphnia dubia | monthly average | report only (tox acute) | Sep | 022 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | Sep | 022 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Sep | 022 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Sep | 022 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 022 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 022 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 023 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 023 |
| Oxygen demand, chem. [low level] [COD] | monthly average | report only (mg/L) | all year | 023 |
| Oxygen demand, chem. [low level] [COD] | daily maximum | report only (mg/L) | all year | 023 |
| pH | daily minimum | report only (SU) | all year | 023 |
| pH | daily maximum | report only (SU) | all year | 023 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 023 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 023 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 023 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 023 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 023 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 023 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 023 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 023 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 023 |
| Lead, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 023 |
| Lead, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 023 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 023 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 023 |
| Rainfall | monthly average | report only (in) | all year | 023 |
| Rainfall | daily maximum | report only (in) | all year | 023 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 023 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 023 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Sep | 023 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Sep | 023 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 023 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 023 |
| pH | daily minimum | ≥ 6.5 SU | Mar, Jun, Sep, Dec | 024 |
| pH | daily maximum | ≤ 9 SU | Mar, Jun, Sep, Dec | 024 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 024 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 024 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 024 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 024 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 024 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 024 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 024 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 024 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 024 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 024 |
| pH | daily minimum | report only (SU) | Mar, Jun, Sep, Dec | 030 |
| pH | daily maximum | report only (SU) | Mar, Jun, Sep, Dec | 030 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 030 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 030 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 030 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 030 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 030 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 030 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 030 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 030 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 030 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 030 |
| pH | daily minimum | report only (SU) | Mar, Jun, Sep, Dec | 041 |
| pH | daily maximum | report only (SU) | Mar, Jun, Sep, Dec | 041 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 041 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 041 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Mar, Jun, Sep, Dec | 041 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 041 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 041 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 041 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Sep, Dec | 041 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 041 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 041 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 041 |
| pH | daily minimum | report only (SU) | all year | 601 |
| pH | daily maximum | report only (SU) | all year | 601 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 601 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 601 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 601 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 601 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 601 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 601 |
| pH | daily minimum | report only (SU) | all year | 602 |
| pH | daily maximum | report only (SU) | all year | 602 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 602 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 602 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 602 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 602 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 602 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 602 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 602 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 602 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 602 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 602 |
| Solids, total suspended | monthly average | ≤ 632 kg/d | all year | 603 |
| Solids, total suspended | daily maximum | ≤ 1284 kg/d | all year | 603 |
| Oil and grease, hexane extr method | monthly average | ≤ 485 kg/d | all year | 603 |
| Oil and grease, hexane extr method | daily maximum | ≤ 672 kg/d | all year | 603 |
| Zinc, total recoverable | monthly average | ≤ 3.7 kg/d | all year | 603 |
| Zinc, total recoverable | daily maximum | ≤ 6.34 kg/d | all year | 603 |
| Lead, total recoverable | monthly average | ≤ 64 ug/L | all year | 603 |
| Lead, total recoverable | monthly average | ≤ 1.47 kg/d | all year | 603 |
| Lead, total recoverable | daily maximum | ≤ 8.18 kg/d | all year | 603 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 603 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 603 |
| Solids, total suspended | monthly average | ≤ 219 kg/d | all year | 604 |
| Solids, total suspended | daily maximum | ≤ 660 kg/d | all year | 604 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 224 kg/d | all year | 604 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 294 kg/d | all year | 604 |
| Cyanide, total [as CN] | monthly average | ≤ 7.45 kg/d | all year | 604 |
| Cyanide, total [as CN] | daily maximum | ≤ 14.89 kg/d | all year | 604 |
| Zinc, total recoverable | monthly average | ≤ 1.11 kg/d | all year | 604 |
| Zinc, total recoverable | daily maximum | ≤ 3.35 kg/d | all year | 604 |
| Lead, total recoverable | monthly average | ≤ .75 kg/d | all year | 604 |
| Lead, total recoverable | daily maximum | ≤ 2.24 kg/d | all year | 604 |
| Phenolics, total recoverable | monthly average | ≤ .25 kg/d | all year | 604 |
| Phenolics, total recoverable | daily maximum | ≤ .5 kg/d | all year | 604 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 604 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 604 |
| pH, maximum | daily maximum | report only (SU) | all year | 604 |
| pH, minimum | daily minimum | report only (SU) | all year | 604 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Sep, Dec | 607 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Sep, Dec | 607 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 613 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 613 |
| Oxygen demand, chem. [low level] [COD] | monthly average | report only (mg/L) | all year | 613 |
| Oxygen demand, chem. [low level] [COD] | daily maximum | report only (mg/L) | all year | 613 |
| pH | daily minimum | report only (SU) | all year | 613 |
| pH | daily maximum | report only (SU) | all year | 613 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 613 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 613 |
| Residue, settleable | monthly average | report only (mg/L) | all year | 613 |
| Residue, settleable | daily maximum | report only (mg/L) | all year | 613 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 613 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 613 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 613 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 613 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Sep, Dec | 617 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Sep, Dec | 617 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Sep, Dec | 620 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Sep, Dec | 620 |
| Solids, total suspended | monthly average | ≤ 300 kg/d | all year | 622 |
| Solids, total suspended | daily maximum | ≤ 892 kg/d | all year | 622 |
| Oil and grease, hexane extr method | monthly average | ≤ 79 kg/d | all year | 622 |
| Oil and grease, hexane extr method | daily maximum | ≤ 230 kg/d | all year | 622 |
| Zinc, total recoverable | daily maximum | ≤ 314 ug/L | all year | 622 |
| Zinc, total recoverable | monthly average | ≤ 2.81 kg/d | all year | 622 |
| Zinc, total recoverable | daily maximum | ≤ 3.47 kg/d | all year | 622 |
| Lead, total recoverable | monthly average | ≤ 64 ug/L | all year | 622 |
| Lead, total recoverable | monthly average | ≤ .56 kg/d | all year | 622 |
| Lead, total recoverable | daily maximum | ≤ 5.58 kg/d | all year | 622 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 622 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 622 |
| pH, maximum | daily maximum | report only (SU) | all year | 622 |
| pH, minimum | daily minimum | report only (SU) | all year | 622 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 633 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 633 |
| Oxygen demand, chem. [low level] [COD] | monthly average | report only (mg/L) | all year | 633 |
| Oxygen demand, chem. [low level] [COD] | daily maximum | report only (mg/L) | all year | 633 |
| pH | daily minimum | report only (SU) | all year | 633 |
| pH | daily maximum | report only (SU) | all year | 633 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 633 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 633 |
| Residue, settleable | monthly average | report only (mg/L) | all year | 633 |
| Residue, settleable | daily maximum | report only (mg/L) | all year | 633 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 633 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 633 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 633 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 633 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 643 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 643 |
| Oxygen demand, chem. [low level] [COD] | monthly average | report only (mg/L) | all year | 643 |
| Oxygen demand, chem. [low level] [COD] | daily maximum | report only (mg/L) | all year | 643 |
| pH | daily minimum | report only (SU) | all year | 643 |
| pH | daily maximum | report only (SU) | all year | 643 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 643 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 643 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 643 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 643 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 643 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 643 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 653 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 653 |
| Oxygen demand, chem. [low level] [COD] | monthly average | report only (mg/L) | all year | 653 |
| Oxygen demand, chem. [low level] [COD] | daily maximum | report only (mg/L) | all year | 653 |
| pH | daily minimum | report only (SU) | all year | 653 |
| pH | daily maximum | report only (SU) | all year | 653 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 653 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 653 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 653 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 653 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 653 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 653 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 800 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 800 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 800 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 800 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 800 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 800 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Sep, Dec | 800 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Sep, Dec | 800 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 801 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 801 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 801 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 801 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 801 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 801 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Sep, Dec | 801 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Sep, Dec | 801 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 804 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 804 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 804 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 804 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 804 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 804 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Sep, Dec | 804 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Sep, Dec | 804 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 806 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 806 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 806 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 806 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 806 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 806 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Sep, Dec | 806 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Sep, Dec | 806 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 808 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 808 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 808 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 808 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 808 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 808 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Sep, Dec | 808 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Sep, Dec | 808 |
| Parameter | New limit | From | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|---|
| Zinc, total recoverable, daily maximum outfall 004 | 720 ug/L | Mar 1, 2029 | new | 26.7 ug/L (6 values) | 0.0371× |
| Mercury, total low level, daily maximum outfall 014 | 1700 ng/L (Mar, Jun, Sep, Dec) | Mar 1, 2029 | new | — | — |
| Mercury, total low level, monthly average outfall 014 | 1.3 ng/L (Mar, Jun, Sep, Dec) | Mar 1, 2029 | new | — | — |
| pH, daily maximum outfall 023 | 11.3 SU | Mar 1, 2029 | new | 9.9 SU (11 values) | 0.876× |
| Solids, total suspended, daily maximum outfall 643 | 45 mg/L | Mar 1, 2029 | new | 10.18 mg/L (6 values) | 0.226× |
| Solids, total suspended, monthly average outfall 643 | 30 mg/L | Mar 1, 2029 | new | 9.35 mg/L (6 values) | 0.312× |
| Solids, total suspended, daily maximum outfall 653 | 45 mg/L | Mar 1, 2029 | new | 6.6 mg/L (5 values) | 0.147× |
| Solids, total suspended, monthly average outfall 653 | 30 mg/L | Mar 1, 2029 | new | 6.6 mg/L (5 values) | 0.22× |
| pH, daily maximum outfall 009 | 9 SU (Mar, Jun, Sep, Dec) | Mar 1, 2030 | new | — | — |
| pH, daily maximum outfall 021 | 9 SU (Mar, Jun, Sep, Dec) | Mar 1, 2030 | new | — | — |
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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