Depew, Town of — NPDES permit OK0021890: limits, due date and EPA's record

NPDES permit OK0021890 · Minor POTW · effective, expires 2027-01-31 · EPA's file as of 2026-09-19

Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

Last period with anything received: 2026-08-31. Most often over: pH (3), BOD, 5-day, 20 deg. C (2), Oxygen, dissolved [DO] (1).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (20)

Outfall	Parameter	Statistic	Limit	Months
001	Oxygen, dissolved [DO]	MO MIN	>= 6 mg/L	Jun, Jul, Aug, Sep, Oct
001	Oxygen, dissolved [DO]	MO MIN	>= 5 mg/L	Apr, May
001	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	Jan, Feb, Mar, Apr, May, Nov, Dec
001	BOD, 5-day, 20 deg. C	MO AVG	<= 25 mg/L	Jun, Jul, Aug, Sep, Oct
001	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	Jan, Feb, Mar, Apr, May, Nov, Dec
001	BOD, 5-day, 20 deg. C	WKLY AVG	<= 37.5 mg/L	Jun, Jul, Aug, Sep, Oct
001	BOD, 5-day, 20 deg. C	MO AVG	<= 12.5 lb/d	Jan, Feb, Mar, Apr, May, Nov, Dec
001	BOD, 5-day, 20 deg. C	MO AVG	<= 10.4 lb/d	Jun, Jul, Aug, Sep, Oct
001	pH	MINIMUM	>= 6.5 SU	all year
001	pH	MAXIMUM	<= 9 SU	all year
001	Solids, total suspended	MO AVG	<= 90 mg/L	all year
001	Solids, total suspended	WKLY AVG	<= 135 mg/L	all year
001	Solids, total suspended	MO AVG	<= 37.5 lb/d	all year
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	INST MAX	<= .099 mg/L	all year
001	E. coli	GEO MEAN	<= 126 CFU/100mL	May, Jun, Jul, Aug, Sep
001	E. coli	GEO MEAN	<= 630 CFU/100mL	Jan, Feb, Mar, Apr, Oct, Nov, Dec
001	E. coli	DAILY MX	<= 406 CFU/100mL	May, Jun, Jul, Aug, Sep
001	E. coli	DAILY MX	<= 2030 CFU/100mL	Jan, Feb, Mar, Apr, Oct, Nov, Dec