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NPDES permit WI0000531 · Major NON-POTW · expired, expires 2023-12-31 · 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 2023-12-31 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

1values over a limit
0required values missing, on 0 form(s)
30of 50 forms filed late

Last period with anything received: 2026-06-30. Most often over: pH (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 (35)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 1504 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 2896 lb/d all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 1813 lb/d all year
001Solids, total suspendedDAILY MX <= 3367 lb/d all year
001Phosphorus, total [as P]ROLL AVG <= 1 mg/L all year
001Phosphorus, total [as P]DAILY MX report only all year
001Phosphorus, total [as P]MO AVG <= 8.2 lb/d all year
001Phosphorus, total [as P]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualWKLY AVG <= 440 ug/L all year
001Chlorine, total residualMO AVG <= 440 ug/L all year
001Chlorine, total residualDAILY MX <= 600 ug/L all year
001Mercury, total recoverableDAILY MX <= 32 ng/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 1504 lb/d all year
002BOD, 5-day, 20 deg. CDAILY MX <= 2896 lb/d all year
002Solids, total suspendedMO AVG <= 1813 lb/d all year
002Solids, total suspendedDAILY MX <= 3367 lb/d all year
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]DAILY MX report only all year
007Temperature, water deg. fahrenheitDAILY MX report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
008BOD, 5-day, 20 deg. CMO AVG report only all year
008BOD, 5-day, 20 deg. CDAILY MX report only all year
008pHDAILY MN report only all year
008pHDAILY MX report only all year
008Solids, total suspendedMO AVG report only all year
008Solids, total suspendedDAILY MX report only all year
008Flow, in conduit or thru treatment plantMO AVG report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
703Mercury, total recoverableDAILY MX 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