Wellston, City of — NPDES permit OH0031780: limits, due date and EPA's record

NPDES permit OH0031780 · Minor 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: Solids, total suspended (1).

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (27)

Outfall	Parameter	Statistic	Limit	Months
002	pH	DAILY MN	>= 6.5 SU	all year
002	pH	DAILY MX	<= 10 SU	all year
002	Solids, total suspended	MO AVG	<= 30 mg/L	all year
002	Solids, total suspended	DAILY MX	<= 45 mg/L	all year
002	Solids, total suspended	MO AVG	<= 9 kg/d	all year
002	Solids, total suspended	DAILY MX	<= 13.5 kg/d	all year
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	<= .019 mg/L	all year
601	Flow rate	MO AVG	report only	all year
601	Flow rate	DAILY MX	report only	all year
601	pH	DAILY MN	>= 6.5 SU	Jun, Dec
601	pH	DAILY MX	<= 9 SU	Jun, Dec
601	Solids, total suspended	MO AVG	<= 12 mg/L	Jun, Dec
601	Solids, total suspended	WKLY MAX	<= 18 mg/L	Jun, Dec
601	Solids, total suspended	MO AVG	<= .023 kg/d	Jun, Dec
601	Solids, total suspended	WKLY MAX	<= .034 kg/d	Jun, Dec
601	Nitrogen, ammonia total [as N]	MO AVG	report only	Jun, Dec
601	Nitrogen, ammonia total [as N]	DAILY MX	report only	Jun, Dec
601	Turbidity [severity]	MO AVG	report only	all year
601	Turbidity [severity]	DAILY MX	report only	all year
601	E. coli, MTEC-MF	MO GEOMN	<= 126 MPN/100mL	Jun, Aug
601	E. coli, MTEC-MF	WK GEOMN	<= 284 MPN/100mL	Jun, Aug
601	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 30 mg/L	Jun, Dec
601	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 45 mg/L	Jun, Dec
601	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= .057 kg/d	Jun, Dec
601	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= .085 kg/d	Jun, Dec