CITY OF GILBERT — NPDES permit IA0025968: limits, due date and EPA's record

NPDES permit IA0025968 · Minor POTW · effective, expires 2030-10-31 · 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), 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 (70)

Outfall	Parameter	Statistic	Limit	Months
002	Oxygen, dissolved [DO]	DAILY MN	>= 4.9 mg/L	all year
002	BOD, 5-day, 20 deg. C	30DA AVG	report only	all year
002	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
002	BOD, 5-day, 20 deg. C	30DA AVG	report only	all year
002	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
002	pH	DAILY MN	>= 6.5 SU	all year
002	pH	DAILY MX	<= 9 SU	all year
002	pH	30DA AVG	report only	all year
002	pH	DAILY MX	report only	all year
002	Solids, total suspended	30DA AVG	<= 30 mg/L	all year
002	Solids, total suspended	7 DA AVG	<= 45 mg/L	all year
002	Solids, total suspended	30DA AVG	<= 107 lb/d	all year
002	Solids, total suspended	7 DA AVG	<= 160 lb/d	all year
002	Solids, total suspended	30DA AVG	report only	all year
002	Solids, total suspended	DAILY MX	report only	all year
002	Solids, total suspended	30DA AVG	report only	all year
002	Solids, total suspended	DAILY MX	report only	all year
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.4 mg/L	Aug
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.5 mg/L	Jul
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.4 mg/L	Nov
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 5 mg/L	Jan
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.3 mg/L	Oct
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 5.7 mg/L	Feb
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.5 mg/L	Sep
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.6 mg/L	Dec
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.9 mg/L	Jun
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.2 mg/L	Apr
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 4.9 mg/L	Mar
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.5 mg/L	May
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 7.1 mg/L	Aug
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 7.1 mg/L	Jul
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 5.8 mg/L	Nov
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 7.1 mg/L	Jan
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 7.1 mg/L	Oct
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 8.6 mg/L	Feb
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 8.5 mg/L	Sep
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 7.1 mg/L	Dec
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 7.1 mg/L	Jun
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 8.5 mg/L	Apr
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 8.6 mg/L	Mar
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 8.5 mg/L	May
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 3.9 lb/d	Aug
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 4.1 lb/d	Jul
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 9.5 lb/d	Nov
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 14 lb/d	Jan
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 6.4 lb/d	Oct
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 16.2 lb/d	Feb
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 4.3 lb/d	Sep
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 10.2 lb/d	Dec
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 5.4 lb/d	Jun
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 6.2 lb/d	Apr
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 13.9 lb/d	Mar
002	Nitrogen, ammonia total [as N]	30DA AVG	<= 7.1 lb/d	May
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 25 lb/d	Aug
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 25 lb/d	Jul
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 20.6 lb/d	Nov
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 25 lb/d	Jan
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 24.9 lb/d	Oct
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 30.2 lb/d	Feb
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 30.1 lb/d	Sep
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 24.9 lb/d	Dec
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 25 lb/d	Jun
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 30.1 lb/d	Apr
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 30.2 lb/d	Mar
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 30.2 lb/d	May
002	E. coli	GEO MEAN	<= 221 #/100mL	Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
002	BOD, carbonaceous [5 day, 20 C]	30DA AVG	<= 25 mg/L	all year
002	BOD, carbonaceous [5 day, 20 C]	7 DA AVG	<= 40 mg/L	all year
002	BOD, carbonaceous [5 day, 20 C]	30DA AVG	<= 89 lb/d	all year
002	BOD, carbonaceous [5 day, 20 C]	7 DA AVG	<= 142 lb/d	all year