City of Chippewa Falls

NPDES permit WI0023604 · Major POTW · expired, expires 2025-09-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2025-09-30 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

9values over a limit
0required values missing, on 0 form(s)
3of 48 forms filed late

Last period with anything received: 2026-06-30. Most often over: Phosphorus, total [as P] (3), Solids, total suspended (3), BOD, carbonaceous [5 day, 5 C] (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 (33)

OutfallParameterStatisticLimitMonths
001Nitrogen, total [as N]MO MAX report only all year
001Nitrogen, ammonia total [as N]MO MAX report only all year
001Nitrogen, Kjeldahl, total [as N]MO MAX report only all year
001Nitrite + Nitrate total [as N]MO MAX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantMO MAX report only all year
004pHDAILY MN >= 6 SU all year
004pHDAILY MX <= 9 SU all year
004Solids, total suspendedWKLY AVG <= 45 mg/L all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Nitrogen, total [as N]QB report only all year
004Nitrogen, ammonia total [as N]QB report only all year
004Nitrogen, Kjeldahl, total [as N]QB report only all year
004Nitrite + Nitrate total [as N]QB report only all year
004Phosphorus, total [as P]MO AVG <= 1.4 mg/L all year
004Copper, total recoverableMO MAX report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantMO MAX report only all year
004Mercury, total recoverableDAILY MX <= 4.9 ng/L all year
004BOD, carbonaceous [5 day, 5 C]WKLY AVG <= 40 mg/L all year
004BOD, carbonaceous [5 day, 5 C]MO AVG <= 25 mg/L all year
101Mercury, total recoverableMO MAX report only all year
701BOD, 5-day, 20 deg. CMO AVG report only all year
701BOD, 5-day, 20 deg. CMO MAX report only all year
701Solids, total suspendedMO AVG report only all year
701Solids, total suspendedMO MAX report only all year
701Phosphorus, total [as P]MO MAX report only all year
701Lead, total recoverableQB report only all year
701Copper, total recoverableMO MAX report only all year
701Flow, in conduit or thru treatment plantMO AVG report only all year
701Flow, in conduit or thru treatment plantMO MAX report only all year
701Mercury, total recoverableMO MAX report only all year
701BOD, carbonaceous [5 day, 5 C]MO MAX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states