Altus, City of(SW WDS) — NPDES permit OK0028045: limits, due date and EPA's record

NPDES permit OK0028045 · Minor POTW · effective, expires 2029-08-31 · EPA's file as of 2026-09-19

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

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 (22)

Outfall	Parameter	Statistic	Limit	Months
001	Oxygen, dissolved [DO]	INST MIN	>= 4 mg/L	Jan, Feb, Mar, Apr, May, Nov, Dec
001	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	Apr, May
001	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	Jan, Feb, Mar, Nov, Dec
001	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	Apr, May
001	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	Jan, Feb, Mar, Nov, Dec
001	BOD, 5-day, 20 deg. C	MO AVG	<= 162.6 lb/d	Apr, May
001	BOD, 5-day, 20 deg. C	MO AVG	<= 237.7 lb/d	Jan, Feb, Mar, Nov, Dec
001	pH	MINIMUM	>= 6.5 SU	Jan, Feb, Mar, Apr, May, Nov, Dec
001	pH	MAXIMUM	<= 9 SU	Jan, Feb, Mar, Apr, May, Nov, Dec
001	Solids, total suspended	MO AVG	<= 90 mg/L	Apr, May
001	Solids, total suspended	MO AVG	<= 90 mg/L	Jan, Feb, Mar, Nov, Dec
001	Solids, total suspended	WKLY AVG	<= 135 mg/L	Apr, May
001	Solids, total suspended	WKLY AVG	<= 135 mg/L	Jan, Feb, Mar, Nov, Dec
001	Solids, total suspended	MO AVG	<= 487.9 lb/d	Apr, May
001	Solids, total suspended	MO AVG	<= 713.1 lb/d	Jan, Feb, Mar, Nov, Dec
001	Chloride, dissolved in water	DAILY MX	report only	Jan, Feb, Mar, Apr, May, Nov, Dec
001	Flow, in conduit or thru treatment plant	MO AVG	<= 0 MGD	Jun, Jul, Aug, Sep, Oct
001	Flow, in conduit or thru treatment plant	MO AVG	report only	Jan, Feb, Mar, Apr, May, Nov, Dec
001	Flow, in conduit or thru treatment plant	DAILY MX	<= 0 MGD	Jun, Jul, Aug, Sep, Oct
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	Jan, Feb, Mar, Apr, May, Nov, Dec
001	E. coli	GEO MEAN	<= 630 MPN/100mL	Jan, Feb, Mar, Apr, May, Nov, Dec
001	E. coli	DAILY MX	<= 2030 MPN/100mL	Jan, Feb, Mar, Apr, May, Nov, Dec