Marshfield (City of)

NPDES permit WI0021024 · Major POTW · expired, expires 2023-09-30 · 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 2023-09-30 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

0values over a limit
50required values missing, on 20 form(s)
12of 28 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 (33)

OutfallParameterStatisticLimitMonths
002Oxygen, dissolved [DO]MINIMUM >= 4 mg/L all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedWKLY AVG <= 30 mg/L all year
002Solids, total suspendedMO AVG <= 20 mg/L all year
002Solids, total suspendedDAILY MX report only all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, total [as N]QB report only all year
002Nitrogen, ammonia total [as N]MO AVG report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
002Nitrogen, Kjeldahl, total [as N]QB report only all year
002Nitrite + Nitrate total [as N]DAILY MX report only all year
002Nitrite + Nitrate total [as N]QB report only all year
002Phosphorus, total [as P]MO AVG <= 1 mg/L all year
002Phosphorus, total [as P]DAILY MX report only all year
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]DAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Mercury, total recoverableDAILY MX <= 4.8 ng/L all year
002Mercury, total recoverableDAILY MX <= 4.8 ng/L all year
002BOD, carbonaceous [5 day, 5 C]WKLY AVG <= 25 mg/L all year
002BOD, carbonaceous [5 day, 5 C]MO AVG <= 16 mg/L all year
002BOD, carbonaceous [5 day, 5 C]DAILY MX report only all year
702BOD, 5-day, 20 deg. CMO AVG report only all year
702BOD, 5-day, 20 deg. CDAILY MX report only all year
702Solids, total suspendedMO AVG report only all year
702Solids, total suspendedDAILY MX report only all year
702Mercury, total recoverableDAILY MX report only all year
702Mercury, total recoverableQB report only all year
702BOD, carbonaceous [5 day, 5 C]MO AVG report only all year
702BOD, carbonaceous [5 day, 5 C]DAILY 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