Wisconsin Public Service Corp Weston 3 & 4

NPDES permit WI0042765 · Major NON-POTW · effective, expires 2029-06-30 · 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.

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

0values over a limit
0required values missing, on 0 form(s)
0of 109 forms filed late

Last period with anything received: 2026-06-30.

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 (66)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. fahrenheitMO MAX report only all year
002Phosphorus, total [as P]MO MAX report only all year
002Phosphorus, total [as P]MO AVG report only all year
002Hardness, total [as CaCO3]ANNL MAX report only all year
002Copper, total recoverableMO AVG <= 47 ug/L all year
002Copper, total recoverableDAILY MX <= 47 ug/L all year
002Copper, total recoverableDAILY MX <= 1.5 lb/d all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantMO MAX report only all year
002Mercury, total recoverableDAILY MX <= 11 ng/L 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
005Temperature, water deg. fahrenheitMO MAX report only all year
005Chlorine, total residual [dsg. time]DAILY MX <= 120 min/d all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantMO MAX report only all year
005Chlorine, total residualDAILY MX <= 200 ug/L all year
005Mercury, total recoverableQB report only all year
102pHDAILY MN >= 4 SU all year
102pHDAILY MX <= 11 SU all year
102Solids, total suspendedMO AVG <= 30 mg/L all year
102Solids, total suspendedDAILY MX <= 100 mg/L all year
102Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
102Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
102Iron, total recoverableMO AVG <= 1 mg/L all year
102Iron, total recoverableDAILY MX <= 1 mg/L all year
102Copper, total recoverableMO AVG <= 1 mg/L all year
102Copper, total recoverableDAILY MX <= 1 mg/L all year
102Flow, in conduit or thru treatment plantMO AVG report only all year
102Flow, in conduit or thru treatment plantMO MAX report only all year
102pH range excursions, > 60 minutesMO TOTAL <= 0 occur/d all year
102pH range excursions, monthly total accumMO TOTAL <= 446 min all year
103pHDAILY MN >= 4 SU all year
103pHDAILY MX <= 11 SU all year
103Solids, total suspendedMO AVG <= 30 mg/L all year
103Solids, total suspendedDAILY MX <= 100 mg/L all year
103Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
103Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
103Flow, in conduit or thru treatment plantMO AVG report only all year
103Flow, in conduit or thru treatment plantMO MAX report only all year
103pH range excursions, > 60 minutesMO TOTAL <= 0 occur/d all year
103pH range excursions, monthly total accumMO TOTAL <= 446 min all year
104Chlorine, total residual [dsg. time]DAILY MX <= 120 min/d all year
104pHDAILY MN >= 6 SU all year
104pHDAILY MX <= 9 SU all year
104Flow, in conduit or thru treatment plantMO AVG report only all year
104Flow, in conduit or thru treatment plantMO MAX report only all year
104Chlorine, total residualMO MAX report only all year
105Chlorine, total residual [dsg. time]DAILY MX <= 120 min/d all year
105pHDAILY MN >= 6 SU all year
105pHDAILY MX <= 9 SU all year
105Flow, in conduit or thru treatment plantMO AVG report only all year
105Flow, in conduit or thru treatment plantMO MAX report only all year
105Chlorine, total residualMO MAX report only all year
109Mercury, total recoverableMO MAX report only all year
112pHDAILY MN >= 4 SU all year
112pHDAILY MX <= 11 SU all year
112Solids, total suspendedDAILY MX <= 50 mg/L all year
112Flow, in conduit or thru treatment plantMO AVG report only all year
112Flow, in conduit or thru treatment plantMO MAX report only all year
112pH range excursions, > 60 minutesMO TOTAL <= 0 occur/d all year
112pH range excursions, monthly total accumMO TOTAL <= 446 min all year
701Phosphorus, total [as P]MO 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

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