DENMARK WASTEWATER TREATMENT F

NPDES permit WI0021741 · Minor 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

14values over a limit
9required values missing, on 9 form(s)
18of 20 forms filed late

Last period with anything received: 2026-06-30. Most often over: pH (5), Chloride [as Cl] (5), Solids, total suspended (2).

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 (25)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Oxygen, dissolved [DO]DAILY MN >= 4 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 15 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 30 mg/L all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 20 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 11 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 4.8 mg/L Apr, May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG <= 4.9 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 2.9 mg/L Apr, May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Apr, May, Jun, Jul, Aug, Sep
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Chloride [as Cl]WKLY AVG <= 980 mg/L all year
001Chloride [as Cl]DAILY MX <= 1200 mg/L 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
701BOD, 5-day, 20 deg. CMO AVG report only all year
701BOD, 5-day, 20 deg. CDAILY MX report only all year
701Solids, total suspendedMO AVG report only all year
701Solids, total suspendedDAILY MX report only all year
701Flow, in conduit or thru treatment plantMO AVG report only all year
701Flow, in conduit or thru treatment plantDAILY 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