NEORSD Southerly Wastewater Treatment Center — NPDES permit OH0024651: limits, due date and EPA's record

NPDES permit OH0024651 · Major POTW · effective, expires 2030-06-30 · 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: Mercury, total low level (1).

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 (196)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. centigrade	MO AVG	report only	all year
001	Temperature, water deg. centigrade	DAILY MX	report only	all year
001	Oxygen, dissolved [DO]	DAILY MN	>= 5 mg/L	all year
001	Solids, total suspended	MO AVG	<= 16 mg/L	all year
001	Solids, total suspended	WKLY MAX	<= 24 mg/L	all year
001	Solids, total suspended	MO AVG	<= 10598 kg/d	all year
001	Solids, total suspended	WKLY MAX	<= 15897 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	<= 1.7 mg/L	May, Jun, Jul, Aug, Sep, Oct
001	Nitrogen, ammonia total [as N]	MO AVG	<= 4.7 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
001	Nitrogen, ammonia total [as N]	WKLY MAX	<= 2.6 mg/L	May, Jun, Jul, Aug, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY MAX	<= 7.1 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
001	Nitrogen, ammonia total [as N]	MO AVG	<= 1126 kg/d	May, Jun, Jul, Aug, Sep, Oct
001	Nitrogen, ammonia total [as N]	MO AVG	<= 3113 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
001	Nitrogen, ammonia total [as N]	WKLY MAX	<= 1722 kg/d	May, Jun, Jul, Aug, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY MAX	<= 4670 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
001	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
001	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
001	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
001	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
001	Phosphorus, total [as P]	MO AVG	<= .7 mg/L	all year
001	Phosphorus, total [as P]	WKLY MAX	<= 1.1 mg/L	all year
001	Phosphorus, total [as P]	MO AVG	<= 464 kg/d	all year
001	Phosphorus, total [as P]	WKLY MAX	<= 729 kg/d	all year
001	Phosphate, ortho, dissolved [as P]	MO AVG	report only	all year
001	Phosphate, ortho, dissolved [as P]	DAILY MX	report only	all year
001	Nickel, total recoverable	MO AVG	report only	all year
001	Nickel, total recoverable	DAILY MX	report only	all year
001	Zinc, total recoverable	MO AVG	report only	all year
001	Zinc, total recoverable	DAILY MX	report only	all year
001	Cadmium, total recoverable	MO AVG	report only	all year
001	Cadmium, total recoverable	DAILY MX	report only	all year
001	Lead, total recoverable	MO AVG	report only	all year
001	Lead, total recoverable	DAILY MX	report only	all year
001	Chromium, total recoverable	MO AVG	report only	all year
001	Chromium, total recoverable	DAILY MX	report only	all year
001	Copper, total recoverable	MO AVG	report only	all year
001	Copper, total recoverable	DAILY MX	report only	all year
001	Chromium, hexavalent dissolved [as Cr]	MO AVG	report only	all year
001	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	all year
001	E. coli, MTEC-MF	MO GEOMN	report only	May, Jun, Jul, Aug, Sep, Oct
001	E. coli, MTEC-MF	DAILY MX	report only	May, Jun, Jul, Aug, Sep, Oct
001	Polychlorinated biphenyls [PCBs]	MO AVG	report only	Mar, Jun, Sep, Dec
001	Polychlorinated biphenyls [PCBs]	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	Chlorine, total residual	DAILY MX	<= .021 mg/L	May, Jun, Jul, Aug, Sep, Oct
001	Mercury, total low level	MO AVG	<= 3.1 ng/L	all year
001	Mercury, total low level	DAILY MX	<= 1700 ng/L	all year
001	Mercury, total low level	MO AVG	<= .0021 kg/d	all year
001	Mercury, total low level	DAILY MX	<= 1.1 kg/d	all year
001	Cyanide, free available	MO AVG	report only	all year
001	Cyanide, free available	DAILY MX	report only	all year
001	Toxicity [acute], Ceriodaphnia dubia	MO AVG	report only	Sep
001	Toxicity [acute], Ceriodaphnia dubia	DAILY MX	report only	Sep
001	Toxicity [chronic], Ceriodaphnia dubia	MO AVG	report only	Sep
001	Toxicity [chronic], Ceriodaphnia dubia	DAILY MX	report only	Sep
001	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MO AVG	report only	Mar, Jun, Sep, Dec
001	Toxicity [acute], Pimephales promelas [Fathead Minnow]	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MO AVG	report only	Mar, Jun, Sep, Dec
001	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	DAILY MX	report only	Mar, Jun, Sep, Dec
001	pH, maximum	DAILY MX	<= 9 SU	all year
001	pH, minimum	DAILY MN	>= 6 SU	all year
001	Solids, total dissolved- 180 deg. C	MO AVG	report only	all year
001	Solids, total dissolved- 180 deg. C	DAILY MX	report only	all year
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	May, Jun, Jul, Aug, Sep, Oct
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 16 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
001	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 15 mg/L	May, Jun, Jul, Aug, Sep, Oct
001	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 24 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 6620 kg/d	May, Jun, Jul, Aug, Sep, Oct
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10598 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
001	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 9936 kg/d	May, Jun, Jul, Aug, Sep, Oct
001	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 15897 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
002	pH	DAILY MN	report only	all year
002	pH	DAILY MX	report only	all year
002	Solids, total suspended	DAILY MX	report only	all year
002	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
002	Phosphorus, total [as P]	MO AVG	report only	all year
002	Phosphorus, total [as P]	DAILY MX	report only	all year
002	E. coli, MTEC-MF	MO GEOMN	report only	May, Jun, Jul, Aug, Sep, Oct
002	E. coli, MTEC-MF	DAILY MX	report only	May, Jun, Jul, Aug, Sep, Oct
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Chlorine, total residual	DAILY MX	report only	May, Jun, Jul, Aug, Sep, Oct
002	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
002	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
002	Duration of discharge	MO AVG	report only	all year
002	Duration of discharge	DAILY MX	report only	all year
093	pH	DAILY MN	report only	all year
093	pH	DAILY MX	report only	all year
093	Solids, total suspended	MO AVG	report only	all year
093	Solids, total suspended	DAILY MX	report only	all year
093	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
093	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
093	Phosphorus, total [as P]	MO AVG	report only	all year
093	Phosphorus, total [as P]	DAILY MX	report only	all year
093	E. coli, MTEC-MF	MO GEOMN	report only	May, Jun, Jul, Aug, Sep, Oct
093	E. coli, MTEC-MF	DAILY MX	report only	May, Jun, Jul, Aug, Sep, Oct
093	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
093	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
093	Chlorine, total residual	DAILY MX	report only	May, Jun, Jul, Aug, Sep, Oct
093	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
093	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
093	Duration of discharge	MO AVG	report only	all year
093	Duration of discharge	DAILY MX	report only	all year
099	E. coli, MTEC-MF	MO GEOMN	<= 126 MPN/100mL	May, Jun, Jul, Aug, Sep, Oct
099	E. coli, MTEC-MF	WK GEOMN	<= 284 MPN/100mL	May, Jun, Jul, Aug, Sep, Oct
099	Flow, in conduit or thru treatment plant	MO AVG	report only	May, Jun, Jul, Aug, Sep, Oct
099	Flow, in conduit or thru treatment plant	DAILY MX	report only	May, Jun, Jul, Aug, Sep, Oct
300	Overflows	MO AVG	report only	all year
300	Overflows	DAILY MX	report only	all year
585	Arsenic, dry weight	MO AVG	report only	all year
585	Arsenic, dry weight	DAILY MX	report only	all year
585	Beryllium, in bottom deposits [dry wgt]	MO AVG	report only	all year
585	Beryllium, in bottom deposits [dry wgt]	DAILY MX	report only	all year
585	Chromium, total in bot dep [wet wgt]	MO AVG	report only	all year
585	Chromium, total in bot dep [wet wgt]	DAILY MX	report only	all year
585	Cadmium, in bottom deposits [dry wgt]	MO AVG	report only	all year
585	Cadmium, in bottom deposits [dry wgt]	DAILY MX	report only	all year
585	Lead, total dry weight [as Pb]	MO AVG	report only	all year
585	Lead, total dry weight [as Pb]	DAILY MX	report only	all year
585	Nickel, tot in bottom deposits [dry wgt]	MO AVG	report only	all year
585	Nickel, tot in bottom deposits [dry wgt]	DAILY MX	report only	all year
585	Biosolids weight indluding admixtures	MO AVG	report only	all year
585	Biosolids weight indluding admixtures	DAILY MX	report only	all year
585	Mercury, tot in bot deposits [dry wgt]	MO AVG	report only	all year
585	Mercury, tot in bot deposits [dry wgt]	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	all year
601	Cyanide, total [as CN]	DAILY MX	report only	all year
601	Nickel, total recoverable	MO AVG	report only	all year
601	Nickel, total recoverable	DAILY MX	report only	all year
601	Zinc, total recoverable	MO AVG	report only	all year
601	Zinc, total recoverable	DAILY MX	report only	all year
601	Cadmium, total recoverable	MO AVG	report only	all year
601	Cadmium, total recoverable	DAILY MX	report only	all year
601	Lead, total recoverable	MO AVG	report only	all year
601	Lead, total recoverable	DAILY MX	report only	all year
601	Chromium, total recoverable	MO AVG	report only	all year
601	Chromium, total recoverable	DAILY MX	report only	all year
601	Copper, total recoverable	MO AVG	report only	all year
601	Copper, total recoverable	DAILY MX	report only	all year
601	Chromium, hexavalent dissolved [as Cr]	MO AVG	report only	all year
601	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	all year
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
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	Sep
801	%Effect Static Renewal 48Hr Acute Ceriodaphnia dubia	DAILY MX	report only	Sep
801	%Effect Static Renewal 96Hr Acute Pimephales promelas	MO AVG	report only	Mar, Jun, Sep, Dec
801	%Effect Static Renewal 96Hr Acute Pimephales promelas	DAILY MX	report only	Mar, Jun, Sep, Dec
801	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	MO AVG	report only	Sep
801	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	DAILY MX	report only	Sep
801	%Effect Static Renewal 7Day Chronic Pimephales promelas	MO AVG	report only	Mar, Jun, Sep, Dec
801	%Effect Static Renewal 7Day Chronic Pimephales promelas	DAILY MX	report only	Mar, Jun, Sep, Dec
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