CITY OF PEOSTA — NPDES permit IA0075507: limits, due date and EPA's record

NPDES permit IA0075507 · Minor POTW · effective, expires 2027-02-28 · 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: Nitrogen, ammonia total [as N] (2), Copper, total [as Cu] (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 (90)

Outfall	Parameter	Statistic	Limit	Months
004	Oxygen, dissolved [DO]	DAILY MN	>= 5 mg/L	all year
004	BOD, 5-day, 20 deg. C	30DA AVG	report only	all year
004	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
004	BOD, 5-day, 20 deg. C	30DA AVG	report only	all year
004	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
004	pH	DAILY MN	>= 6.5 SU	all year
004	pH	DAILY MX	<= 9 SU	all year
004	pH	30DA AVG	report only	all year
004	pH	DAILY MX	report only	all year
004	Solids, total suspended	30DA AVG	<= 30 mg/L	all year
004	Solids, total suspended	7 DA AVG	<= 45 mg/L	all year
004	Solids, total suspended	30DA AVG	<= 110 lb/d	all year
004	Solids, total suspended	7 DA AVG	<= 166 lb/d	all year
004	Solids, total suspended	30DA AVG	report only	all year
004	Solids, total suspended	DAILY MX	report only	all year
004	Solids, total suspended	30DA AVG	report only	all year
004	Solids, total suspended	DAILY MX	report only	all year
004	Nitrogen, total [as N]	30DA AVG	report only	all year
004	Nitrogen, total [as N]	DAILY MX	report only	all year
004	Nitrogen, total [as N]	30DA AVG	report only	all year
004	Nitrogen, total [as N]	DAILY MX	report only	all year
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.1 mg/L	Mar
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.4 mg/L	Jan
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 1 mg/L	Aug
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.6 mg/L	Oct
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.5 mg/L	Dec
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.5 mg/L	Apr
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 4 mg/L	Feb
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.7 mg/L	May
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 1 mg/L	Jul
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.3 mg/L	Nov
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.1 mg/L	Sep
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.3 mg/L	Jun
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 14.7 mg/L	Mar
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 15.2 mg/L	Jan
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 16.2 mg/L	Aug
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 15.7 mg/L	Oct
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 16 mg/L	Dec
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 15.7 mg/L	Apr
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 14.2 mg/L	Feb
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 15.2 mg/L	May
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 17.6 mg/L	Jul
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 14.7 mg/L	Nov
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 16.5 mg/L	Sep
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 14.4 mg/L	Jun
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 7.7 lb/d	Mar
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 12.6 lb/d	Jan
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.5 lb/d	Aug
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 5.7 lb/d	Oct
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 9.1 lb/d	Dec
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 5.6 lb/d	Apr
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 14.6 lb/d	Feb
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 6.4 lb/d	May
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.7 lb/d	Jul
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 8.6 lb/d	Nov
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.9 lb/d	Sep
004	Nitrogen, ammonia total [as N]	30DA AVG	<= 4.8 lb/d	Jun
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 54.1 lb/d	Mar
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 56 lb/d	Jan
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 59.8 lb/d	Aug
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 57.9 lb/d	Oct
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 58.8 lb/d	Dec
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 57.9 lb/d	Apr
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 52.3 lb/d	Feb
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 56 lb/d	May
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 64.8 lb/d	Jul
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 54.1 lb/d	Nov
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 60.8 lb/d	Sep
004	Nitrogen, ammonia total [as N]	DAILY MX	<= 53.2 lb/d	Jun
004	Nitrogen, Kjeldahl, total [as N]	30DA AVG	report only	all year
004	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
004	Nitrogen, Kjeldahl, total [as N]	30DA AVG	report only	all year
004	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
004	Phosphorus, total [as P]	30DA AVG	report only	all year
004	Phosphorus, total [as P]	DAILY MX	report only	all year
004	Phosphorus, total [as P]	30DA AVG	report only	all year
004	Phosphorus, total [as P]	DAILY MX	report only	all year
004	Copper, total [as Cu]	30DA AVG	<= .01687 mg/L	all year
004	Copper, total [as Cu]	DAILY MX	<= .0269 mg/L	all year
004	Copper, total [as Cu]	30DA AVG	<= .06218 lb/d	all year
004	Copper, total [as Cu]	DAILY MX	<= .09916 lb/d	all year
004	Zinc, total [as Zn]	30DA AVG	<= .2156 mg/L	all year
004	Zinc, total [as Zn]	DAILY MX	<= .2156 mg/L	all year
004	Zinc, total [as Zn]	30DA AVG	<= .7946 lb/d	all year
004	Zinc, total [as Zn]	DAILY MX	<= .7946 lb/d	all year
004	E. coli	GEO MEAN	<= 126 #/100mL	Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
004	BOD, carbonaceous [5 day, 20 C]	30DA AVG	<= 25 mg/L	all year
004	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 31 mg/L	all year
004	BOD, carbonaceous [5 day, 20 C]	30DA AVG	<= 92 lb/d	all year
004	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 114 lb/d	all year