Richwoods R-VII School District — NPDES permit MO0088927: limits, due date and EPA's record

NPDES permit MO0088927 · Minor NON-POTW · effective, expires 2028-09-30 · EPA's file as of 2026-09-19

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

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MO permits in EPA's filings — check your permit).

Limits in force (22)

Outfall	Parameter	Statistic	Limit	Months
002	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	all year
002	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	all year
002	pH	MINIMUM	>= 6.5 SU	all year
002	pH	MAXIMUM	<= 9 SU	all year
002	Solids, total suspended	WKLY AVG	<= 45 mg/L	all year
002	Solids, total suspended	MO AVG	<= 30 mg/L	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 12.1 mg/L	Apr, May, Jun
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 12.1 mg/L	Jan, Feb, Mar
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 12.1 mg/L	Oct, Nov, Dec
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 12.1 mg/L	Jul, Aug, Sep
002	Nitrogen, ammonia total [as N]	MO AVG	<= 2 mg/L	Apr, May, Jun
002	Nitrogen, ammonia total [as N]	MO AVG	<= 3.1 mg/L	Jan, Feb, Mar
002	Nitrogen, ammonia total [as N]	MO AVG	<= 2.9 mg/L	Oct, Nov, Dec
002	Nitrogen, ammonia total [as N]	MO AVG	<= 1.5 mg/L	Jul, Aug, Sep
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	E. coli	7 DA GEO	<= 1030 #/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
002	E. coli	30DA GM	<= 206 #/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
002	BOD, 5-day, percent removal	MO AV MN	>= 85 %	all year
002	Solids, suspended percent removal	MO AV MN	>= 85 %	all year
INF	BOD, 5-day, 20 deg. C	MO AVG	report only	all year
INF	Solids, total suspended	MO AVG	report only	all year