Hamilton Co Brd of Comm Metropolitan SD — NPDES permit OH0025488: limits, due date and EPA's record

NPDES permit OH0025488 · Major POTW · effective, expires 2026-09-30 · EPA's file as of 2026-09-19

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

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 (188)

Outfall	Parameter	Statistic	Limit	Months
003	Temperature, water deg. centigrade	MO AVG	report only	all year
003	Temperature, water deg. centigrade	DAILY MX	report only	all year
003	Oxygen, dissolved [DO]	DAILY MN	>= 6 mg/L	all year
003	Solids, total suspended	MO AVG	<= 13 mg/L	all year
003	Solids, total suspended	WKLY MAX	<= 20 mg/L	all year
003	Solids, total suspended	MO AVG	<= 443 kg/d	all year
003	Solids, total suspended	WKLY MAX	<= 682 kg/d	all year
003	Oil and grease, hexane extr method	DAILY MX	<= 10 mg/L	all year
003	Nitrogen, ammonia total [as N]	MO AVG	<= 1.1 mg/L	May, Jun, Jul, Aug, Sep, Oct
003	Nitrogen, ammonia total [as N]	MO AVG	<= 2.9 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
003	Nitrogen, ammonia total [as N]	WKLY MAX	<= 1.7 mg/L	May, Jun, Jul, Aug, Sep, Oct
003	Nitrogen, ammonia total [as N]	WKLY MAX	<= 4.4 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
003	Nitrogen, ammonia total [as N]	MO AVG	<= 37.5 kg/d	May, Jun, Jul, Aug, Sep, Oct
003	Nitrogen, ammonia total [as N]	MO AVG	<= 98.8 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
003	Nitrogen, ammonia total [as N]	WKLY MAX	<= 58 kg/d	May, Jun, Jul, Aug, Sep, Oct
003	Nitrogen, ammonia total [as N]	WKLY MAX	<= 150 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
003	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
003	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
003	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
003	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	MO AVG	report only	Jan, Feb, Mar, Apr, Nov, Dec
003	Phosphorus, total [as P]	MO AVG	<= 1 mg/L	May, Jun, Jul, Aug, Sep, Oct
003	Phosphorus, total [as P]	DAILY MX	report only	Jan, Feb, Mar, Apr, Nov, Dec
003	Phosphorus, total [as P]	WKLY MAX	<= 1.5 mg/L	May, Jun, Jul, Aug, Sep, Oct
003	Phosphorus, total [as P]	MO AVG	<= 34.1 kg/d	May, Jun, Jul, Aug, Sep, Oct
003	Phosphorus, total [as P]	WKLY MAX	<= 51.1 kg/d	May, Jun, Jul, Aug, Sep, Oct
003	Phosphate, ortho, dissolved [as P]	MO AVG	report only	all year
003	Phosphate, ortho, dissolved [as P]	DAILY MX	report only	all year
003	Selenium, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
003	Selenium, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Thallium, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
003	Thallium, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Nickel, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
003	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Silver total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
003	Silver total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
003	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Cadmium, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
003	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Lead, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
003	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Chromium, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
003	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Copper, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
003	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Chromium, hexavalent dissolved [as Cr]	MO AVG	report only	Mar, Jun, Aug, Dec
003	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	Mar, Jun, Aug, Dec
003	E. coli, MTEC-MF	MO GEOMN	<= 126 MPN/100mL	May, Jun, Jul, Aug, Sep, Oct
003	E. coli, MTEC-MF	WK GEOMN	<= 284 MPN/100mL	May, Jun, Jul, Aug, Sep, Oct
003	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	Mercury, total low level	MO AVG	report only	all year
003	Mercury, total low level	DAILY MX	report only	all year
003	Cyanide, free available	MO AVG	report only	Mar, Jun, Aug, Dec
003	Cyanide, free available	DAILY MX	report only	Mar, Jun, Aug, Dec
003	Toxicity [acute], Ceriodaphnia dubia	MO AVG	report only	Jun
003	Toxicity [acute], Ceriodaphnia dubia	DAILY MX	report only	Jun
003	Toxicity [chronic], Ceriodaphnia dubia	MO AVG	report only	Jun
003	Toxicity [chronic], Ceriodaphnia dubia	DAILY MX	report only	Jun
003	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MO AVG	report only	Jun
003	Toxicity [acute], Pimephales promelas [Fathead Minnow]	DAILY MX	report only	Jun
003	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MO AVG	report only	Jun
003	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	DAILY MX	report only	Jun
003	pH, maximum	DAILY MX	<= 9 SU	all year
003	pH, minimum	DAILY MN	>= 6.5 SU	all year
003	Solids, total dissolved- 180 deg. C	MO AVG	report only	all year
003	Solids, total dissolved- 180 deg. C	DAILY MX	report only	all year
003	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 15 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 341 kg/d	all year
003	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 511 kg/d	all year
004	Solids, total suspended	MO AVG	report only	all year
004	Solids, total suspended	DAILY MX	report only	all year
004	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
004	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
004	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
004	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
004	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
004	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
004	Phosphorus, total [as P]	MO AVG	report only	all year
004	Phosphorus, total [as P]	DAILY MX	report only	all year
004	Bypass Volume	MO AVG	report only	all year
004	Bypass Volume	DAILY MX	report only	all year
004	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
004	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
004	Bypass valve	MO AVG	report only	all year
004	Bypass valve	DAILY MX	report only	all year
004	Bypass of treatment	MO AVG	report only	all year
004	Bypass of treatment	DAILY MX	report only	all year
586	Biosolids weight indluding admixtures	MO AVG	report only	Dec
586	Biosolids weight indluding admixtures	DAILY MX	report only	Dec
588	Sludge weight, dry	MO AVG	report only	Dec
588	Sludge weight, dry	DAILY MX	report only	Dec
601	Solids, total suspended	MO AVG	report only	all year
601	Solids, total suspended	DAILY MX	report only	all year
601	Cyanide, total [as CN]	MO AVG	report only	Mar, Jun, Aug, Dec
601	Cyanide, total [as CN]	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Selenium, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
601	Selenium, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Thallium, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
601	Thallium, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Nickel, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
601	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Silver total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
601	Silver total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
601	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Cadmium, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
601	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Lead, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
601	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Chromium, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
601	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Copper, total recoverable	MO AVG	report only	Mar, Jun, Aug, Dec
601	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Chromium, hexavalent dissolved [as Cr]	MO AVG	report only	Mar, Jun, Aug, Dec
601	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	Mar, Jun, Aug, Dec
601	Mercury, total low level	MO AVG	report only	all year
601	Mercury, total low level	DAILY MX	report only	all year
601	pH, maximum	DAILY MX	report only	all year
601	pH, minimum	DAILY MN	report only	all year
601	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
601	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
602	Solids, total suspended	MO AVG	report only	all year
602	Solids, total suspended	DAILY MX	report only	all year
604	Solids, total suspended	MO AVG	report only	all year
604	Solids, total suspended	DAILY MX	report only	all year
604	Rainfall	MO AVG	report only	all year
604	Rainfall	DAILY MX	report only	all year
604	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
604	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
604	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
604	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
604	Bypass valve	MO AVG	report only	all year
604	Bypass valve	DAILY MX	report only	all year
604	Duration of discharge	MO AVG	report only	all year
604	Duration of discharge	DAILY MX	report only	all year
606	Solids, total suspended	MO AVG	report only	all year
606	Solids, total suspended	DAILY MX	report only	all year
606	Bypass Volume	MO AVG	report only	all year
606	Bypass Volume	DAILY MX	report only	all year
606	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
606	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
606	Bypass valve	MO AVG	report only	all year
606	Bypass valve	DAILY MX	report only	all year
606	Bypass of treatment	MO AVG	report only	all year
606	Bypass of treatment	DAILY MX	report only	all year
801	Temperature, water deg. centigrade	MO AVG	report only	all year
801	Temperature, water deg. centigrade	DAILY MX	report only	all year
801	Oxygen, dissolved [DO]	DAILY MN	report only	all year
801	pH	DAILY MN	report only	all year
801	pH	DAILY MX	report only	all year
801	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
801	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
801	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
801	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
801	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
801	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
801	Phosphorus, total [as P]	MO AVG	report only	all year
801	Phosphorus, total [as P]	DAILY MX	report only	all year
801	E. coli, MTEC-MF	MO GEOMN	report only	Jun, Jul, Aug
801	E. coli, MTEC-MF	DAILY MX	report only	Jun, Jul, Aug
801	%Effect Static Renewal 48Hr Acute Ceriodaphnia dubia	MO AVG	report only	Jun
801	%Effect Static Renewal 48Hr Acute Ceriodaphnia dubia	DAILY MX	report only	Jun
801	%Effect Static Renewal 96Hr Acute Pimephales promelas	MO AVG	report only	Jun
801	%Effect Static Renewal 96Hr Acute Pimephales promelas	DAILY MX	report only	Jun
801	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	MO AVG	report only	Jun
801	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	DAILY MX	report only	Jun
801	%Effect Static Renewal 7Day Chronic Pimephales promelas	MO AVG	report only	Jun
801	%Effect Static Renewal 7Day Chronic Pimephales promelas	DAILY MX	report only	Jun
901	Temperature, water deg. centigrade	MO AVG	report only	all year
901	Temperature, water deg. centigrade	DAILY MX	report only	all year
901	Oxygen, dissolved [DO]	DAILY MN	report only	all year
901	pH	DAILY MN	report only	all year
901	pH	DAILY MX	report only	all year
901	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
901	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
901	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
901	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
901	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
901	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
901	Phosphorus, total [as P]	MO AVG	report only	all year
901	Phosphorus, total [as P]	DAILY MX	report only	all year
901	Hardness, total [as CaCO3]	MO AVG	report only	all year
901	Hardness, total [as CaCO3]	DAILY MX	report only	all year
901	E. coli, MTEC-MF	MO GEOMN	report only	Jun, Jul, Aug
901	E. coli, MTEC-MF	DAILY MX	report only	Jun, Jul, Aug