VILLAGE OF DEERFIELD — NPDES permit WI0023744: limits, due date and EPA's record

NPDES permit WI0023744 · Minor POTW · expired, expires 2025-12-31 · EPA's file as of 2026-09-19

This permit expired on 2025-12-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

Last period with anything received: 2026-06-30. Most often over: BOD, 5-day, 20 deg. C (6), Phosphorus, total [as P] (2).

Reporting

Reports are due about 21 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (23)

Outfall	Parameter	Statistic	Limit	Months
001	Oxygen, dissolved [DO]	DAILY MN	>= 4 mg/L	all year
001	BOD, 5-day, 20 deg. C	WKLY AVG	<= 30 mg/L	all year
001	BOD, 5-day, 20 deg. C	MO AVG	<= 20 mg/L	all year
001	pH	DAILY MN	>= 6 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
001	Phosphorus, total [as P]	MO AVG	<= 1 mg/L	all year
001	Phosphorus, total [as P]	MO AVG	report only	all year
001	Phosphorus, total [as P]	MO MAX	report only	all year
001	Chloride [as Cl]	WKLY AVG	<= 460 mg/L	all year
001	Chloride [as Cl]	MO AVG	report only	all year
001	Chloride [as Cl]	MO MAX	report only	all year
001	Copper, total recoverable	MO AVG	<= 33 ug/L	all year
001	Copper, total recoverable	DAILY MX	<= 47 ug/L	all year
001	Copper, total recoverable	WKLY AVG	<= .11 lb/d	all year
001	Copper, total recoverable	DAILY MX	<= .15 lb/d	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	MO MAX	report only	all year
701	BOD, 5-day, 20 deg. C	MO AVG	report only	all year
701	BOD, 5-day, 20 deg. C	MO MAX	report only	all year
701	Solids, total suspended	MO AVG	report only	all year
701	Solids, total suspended	MO MAX	report only	all year
701	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
701	Flow, in conduit or thru treatment plant	MO MAX	report only	all year