U. S. S. Seamless Tubular Operations, LLC, Lorain — NPDES permit OH0129003: limits, due date and EPA's record

NPDES permit OH0129003 · Major NON-POTW · effective, expires 2028-07-31 · EPA's file as of 2026-09-19

EPA's record, 2025-09-01 to 2026-08-31

Last period with anything received: 2026-07-31. Most often over: Chlorine, total residual (2).

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among OH permits in EPA's filings — check your permit).

Limits in force (173)

Outfall	Parameter	Statistic	Limit	Months
001	Oxygen demand, chem. [low level] [COD]	MO AVG	<= 35 mg/L	all year
001	Oxygen demand, chem. [low level] [COD]	DAILY MX	<= 50 mg/L	all year
001	Oxygen demand, chem. [low level] [COD]	MO AVG	<= 2.6 kg/d	all year
001	Oxygen demand, chem. [low level] [COD]	DAILY MX	<= 3.8 kg/d	all year
001	pH	DAILY MN	>= 6.5 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
001	Solids, total suspended	MO AVG	<= 25 mg/L	all year
001	Solids, total suspended	DAILY MX	<= 45 mg/L	all year
001	Solids, total suspended	MO AVG	<= 1.9 kg/d	all year
001	Solids, total suspended	DAILY MX	<= 3.4 kg/d	all year
001	Oil and grease, hexane extr method	DAILY MX	<= 10 mg/L	all year
001	Nitrogen, ammonia total [as N]	MO AVG	<= 10 mg/L	all year
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 15 mg/L	all year
001	Nitrogen, ammonia total [as N]	MO AVG	<= .76 kg/d	all year
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 1.1 kg/d	all year
001	Carbon, tot organic [TOC]	MO AVG	<= 12 mg/L	all year
001	Carbon, tot organic [TOC]	DAILY MX	<= 17 mg/L	all year
001	Carbon, tot organic [TOC]	MO AVG	<= .91 kg/d	all year
001	Carbon, tot organic [TOC]	DAILY MX	<= 1.3 kg/d	all year
001	Fluoride, total [as F]	MO AVG	report only	Mar, Jun, Sep, Dec
001	Fluoride, total [as F]	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Selenium, total recoverable	MO AVG	<= 5 ug/L	all year
001	Selenium, total recoverable	DAILY MX	<= 69 ug/L	all year
001	Selenium, total recoverable	MO AVG	<= .00038 kg/d	all year
001	Selenium, total recoverable	DAILY MX	<= .0052 kg/d	all year
001	Silver total recoverable	MO AVG	report only	all year
001	Silver total recoverable	DAILY MX	report only	all year
001	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
001	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Mercury, total low level	MO AVG	<= 15.1 ng/L	all year
001	Mercury, total low level	DAILY MX	<= 1700 ng/L	all year
001	Mercury, total low level	MO AVG	<= .0000012 kg/d	all year
001	Mercury, total low level	DAILY MX	<= .00013 kg/d	all year
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	all year
001	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 15 mg/L	all year
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= .76 kg/d	all year
001	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 1.1 kg/d	all year
002	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
002	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
002	Aluminum, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
002	Aluminum, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
003	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
003	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
003	Aluminum, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
003	Aluminum, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
004	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
004	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
004	Aluminum, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
004	Aluminum, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
005	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
005	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
005	Aluminum, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
005	Aluminum, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
006	Temperature, water deg. fahrenheit	MO AVG	report only	all year
006	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
006	Thermal Discharge	MO AVG	report only	all year
006	Thermal Discharge	DAILY MX	report only	all year
006	pH	DAILY MN	>= 6.5 SU	all year
006	pH	DAILY MX	<= 9 SU	all year
006	Solids, total suspended	MO AVG	<= 190 kg/d	all year
006	Solids, total suspended	DAILY MX	<= 507 kg/d	all year
006	Oil and grease [soxhlet extr.] tot.	DAILY MX	<= 10 mg/L	all year
006	Oil and grease [soxhlet extr.] tot.	DAILY MX	<= 127 kg/d	all year
006	Nickel, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
006	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
006	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
006	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
006	Lead, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
006	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
006	Copper, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
006	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
006	Selenium, total [as Se]	MO AVG	report only	all year
006	Selenium, total [as Se]	DAILY MX	report only	all year
006	Oxidants, total residual	DAILY MX	<= .0048 mg/L	Jun, Jul, Aug, Sep
006	Oxidants, total residual	DAILY MX	<= 0 mg/L	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
006	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
006	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
006	Chlorine, total residual	MO AVG	<= .016 mg/L	Jun, Jul, Aug, Sep
006	Chlorine, total residual	DAILY MX	<= .027 mg/L	Jun, Jul, Aug, Sep
006	Chlorine, total residual	DAILY MX	<= 0 mg/L	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
006	Mercury, total low level	MO AVG	<= 4.4 ng/L	all year
006	Mercury, total low level	DAILY MX	<= 1700 ng/L	all year
006	Mercury, total low level	MO AVG	<= .000056 kg/d	all year
006	Mercury, total low level	DAILY MX	<= .022 kg/d	all year
007	Oxygen demand, chem. [low level] [COD]	MO AVG	<= 35 mg/L	all year
007	Oxygen demand, chem. [low level] [COD]	DAILY MX	<= 50 mg/L	all year
007	Oxygen demand, chem. [low level] [COD]	MO AVG	<= 13 kg/d	all year
007	Oxygen demand, chem. [low level] [COD]	DAILY MX	<= 19 kg/d	all year
007	pH	DAILY MN	>= 6.5 SU	all year
007	pH	DAILY MX	<= 9 SU	all year
007	Solids, total suspended	MO AVG	<= 25 mg/L	all year
007	Solids, total suspended	DAILY MX	<= 45 mg/L	all year
007	Solids, total suspended	MO AVG	<= 9.5 kg/d	all year
007	Solids, total suspended	DAILY MX	<= 17 kg/d	all year
007	Oil and grease, hexane extr method	DAILY MX	<= 10 mg/L	all year
007	Nitrogen, ammonia total [as N]	MO AVG	<= 10 mg/L	all year
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 15 mg/L	all year
007	Nitrogen, ammonia total [as N]	MO AVG	<= 3.8 kg/d	all year
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 5.7 kg/d	all year
007	Carbon, tot organic [TOC]	MO AVG	<= 12 mg/L	all year
007	Carbon, tot organic [TOC]	DAILY MX	<= 17 mg/L	all year
007	Carbon, tot organic [TOC]	MO AVG	<= 4.5 kg/d	all year
007	Carbon, tot organic [TOC]	DAILY MX	<= 6.4 kg/d	all year
007	Fluoride, total [as F]	MO AVG	report only	Mar, Jun, Sep, Dec
007	Fluoride, total [as F]	DAILY MX	report only	Mar, Jun, Sep, Dec
007	Selenium, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
007	Selenium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
007	Silver total recoverable	MO AVG	report only	all year
007	Silver total recoverable	DAILY MX	report only	all year
007	Copper, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
007	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
007	Toluene	MO AVG	report only	Sep
007	Toluene	DAILY MX	report only	Sep
007	Benzene	MO AVG	report only	Sep
007	Benzene	DAILY MX	report only	Sep
007	Acenaphthylene	MO AVG	report only	Sep
007	Acenaphthylene	DAILY MX	report only	Sep
007	2,4-Dimethylphenol	MO AVG	<= 19 ug/L	Mar, Jun, Sep, Dec
007	2,4-Dimethylphenol	DAILY MX	<= 47 ug/L	Mar, Jun, Sep, Dec
007	2,4-Dimethylphenol	MO AVG	<= .0072 kg/d	Mar, Jun, Sep, Dec
007	2,4-Dimethylphenol	DAILY MX	<= .018 kg/d	Mar, Jun, Sep, Dec
007	Phenol	MO AVG	report only	Sep
007	Phenol	DAILY MX	report only	Sep
007	Naphthalene	MO AVG	report only	Sep
007	Naphthalene	DAILY MX	report only	Sep
007	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
007	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
007	Mercury, total low level	MO AVG	<= 4.9 ng/L	all year
007	Mercury, total low level	DAILY MX	<= 1700 ng/L	all year
007	Mercury, total low level	MO AVG	<= .0000019 kg/d	all year
007	Mercury, total low level	DAILY MX	<= .00064 kg/d	all year
007	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	all year
007	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 15 mg/L	all year
007	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 3.8 kg/d	all year
007	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 5.7 kg/d	all year
106	Temperature, water deg. fahrenheit	MO AVG	report only	all year
106	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
106	pH	DAILY MN	>= 6.5 SU	all year
106	pH	DAILY MX	<= 9 SU	all year
106	Solids, total suspended	MO AVG	<= 60 mg/L	all year
106	Solids, total suspended	DAILY MX	<= 103 mg/L	all year
106	Oil and grease, hexane extr method	DAILY MX	<= 10 mg/L	all year
106	Nickel, total [as Ni]	MO AVG	report only	all year
106	Nickel, total [as Ni]	DAILY MX	report only	all year
106	Zinc, total recoverable	MO AVG	report only	all year
106	Zinc, total recoverable	DAILY MX	report only	all year
106	Lead, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
106	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
106	Copper, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
106	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
106	Selenium, total [as Se]	MO AVG	report only	all year
106	Selenium, total [as Se]	DAILY MX	report only	all year
106	Oxidants, total residual	DAILY MX	<= .0048 mg/L	Jun, Jul, Aug, Sep
106	Oxidants, total residual	DAILY MX	<= 0 mg/L	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
106	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
106	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
106	Chlorine, total residual	MO AVG	<= .016 mg/L	Jun, Jul, Aug, Sep
106	Chlorine, total residual	DAILY MX	<= .027 mg/L	Jun, Jul, Aug, Sep
106	Chlorine, total residual	DAILY MX	<= 0 mg/L	Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
106	Mercury, total low level	MO AVG	report only	all year
106	Mercury, total low level	DAILY MX	report only	all year
600	Mercury, total low level	MO AVG	report only	all year
600	Mercury, total low level	DAILY MX	report only	all year
801	Temperature, water deg. fahrenheit	MO AVG	report only	all year
801	Temperature, water deg. fahrenheit	DAILY MX	report only	all year
801	Solids, total suspended	MO AVG	report only	all year
801	Solids, total suspended	DAILY MX	report only	all year
801	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
801	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
801	Mercury, total low level	MO AVG	report only	all year
801	Mercury, total low level	DAILY MX	report only	all year