CITY OF CASCADE — NPDES permit IA0027740: limits, due date and EPA's record

NPDES permit IA0027740 · Major POTW · effective, expires 2028-04-30 · 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 (the most common figure among IA permits in EPA's filings — check your permit).

Limits in force (91)

Outfall	Parameter	Statistic	Limit	Months
003	BOD, 5-day, 20 deg. C	30DA AVG	report only	all year
003	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
003	BOD, 5-day, 20 deg. C	30DA AVG	report only	all year
003	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
003	pH	DAILY MN	>= 6 SU	all year
003	pH	DAILY MX	<= 9 SU	all year
003	pH	30DA AVG	report only	all year
003	pH	DAILY MX	report only	all year
003	Solids, total suspended	30DA AVG	<= 30 mg/L	all year
003	Solids, total suspended	7 DA AVG	<= 45 mg/L	all year
003	Solids, total suspended	30DA AVG	<= 312 lb/d	all year
003	Solids, total suspended	7 DA AVG	<= 469 lb/d	all year
003	Solids, total suspended	30DA AVG	report only	all year
003	Solids, total suspended	DAILY MX	report only	all year
003	Solids, total suspended	30DA AVG	report only	all year
003	Solids, total suspended	DAILY MX	report only	all year
003	Nitrogen, total [as N]	30DA AVG	report only	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, total [as N]	30DA AVG	report only	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, total [as N]	30DA AVG	report only	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, total [as N]	30DA AVG	report only	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 20 mg/L	Apr
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 11.6 mg/L	Jun
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 21.5 mg/L	Mar
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 12.5 mg/L	Aug
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 13.5 mg/L	Sep
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 19.9 mg/L	Nov
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 21.5 mg/L	Dec
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 22.1 mg/L	Feb
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 18.1 mg/L	May
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 13.2 mg/L	Jul
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 20.6 mg/L	Oct
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 22.2 mg/L	Jan
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 21.1 mg/L	Apr
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 20.4 mg/L	Jun
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 21.5 mg/L	Mar
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 22.4 mg/L	Aug
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 22.1 mg/L	Sep
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 19.9 mg/L	Nov
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 21.5 mg/L	Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 22.1 mg/L	Feb
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 21.2 mg/L	May
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 24.2 mg/L	Jul
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 21.2 mg/L	Oct
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 22.2 mg/L	Jan
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 85.4 lb/d	Apr
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 52.7 lb/d	Jun
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 113.8 lb/d	Mar
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 53.4 lb/d	Aug
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 59.2 lb/d	Sep
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 131.1 lb/d	Nov
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 139.5 lb/d	Dec
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 178.2 lb/d	Feb
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 80.1 lb/d	May
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 56.3 lb/d	Jul
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 87.6 lb/d	Oct
003	Nitrogen, ammonia total [as N]	30DA AVG	<= 185.5 lb/d	Jan
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 185.7 lb/d	Apr
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 173.9 lb/d	Jun
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 179.5 lb/d	Mar
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 193.7 lb/d	Aug
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 195 lb/d	Sep
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 174.1 lb/d	Nov
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 188.8 lb/d	Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 178.2 lb/d	Feb
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 182.3 lb/d	May
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 210 lb/d	Jul
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 185.8 lb/d	Oct
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 185.5 lb/d	Jan
003	Nitrogen, Kjeldahl, total [as N]	30DA AVG	report only	all year
003	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
003	Nitrogen, Kjeldahl, total [as N]	30DA AVG	report only	all year
003	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	30DA AVG	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	30DA AVG	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	30DA AVG	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	30DA AVG	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	E. coli	GEO MEAN	<= 126 #/100mL	Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
003	Toxicity [acute], Ceriodaphnia dubia	DAILY MX	<= 1 N=0;Y=1	all year
003	Toxicity [acute], Pimephales promelas [Fathead Minnow]	DAILY MX	<= 1 N=0;Y=1	all year
003	BOD, carbonaceous [5 day, 20 C]	30DA AVG	<= 25 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	7 DA AVG	<= 40 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	30DA AVG	<= 260 lb/d	all year
003	BOD, carbonaceous [5 day, 20 C]	7 DA AVG	<= 417 lb/d	all year