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Dunn Paper Ladysmith LLC

Pulp Mills, major discharger, Ladysmith, Wisconsin. NPDES permit WI0003204 expired Mar 31, 2022; its limits still apply. Last 12 months: over a limit once (last January 2026), 51 required values missing, 6 of 19 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (16 values), outfall 001 form Q quarterly (1 value), outfall 701 form AN yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
3 values over a limit, 27 required values missing, 6 of 22 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
January 2026Solids, total suspended, daily maximum3826.1≤ 3320 lb/d15%

Limits in force (21)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximum≤ 120 deg Fall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 1492 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 2743 lb/dall year001
pHdaily minimum≥ 4 SUall year001
pHdaily maximum≤ 11 SUall year001
Solids, total suspendedmonthly average≤ 1699 lb/dall year001
Solids, total suspendeddaily maximum≤ 3320 lb/dall year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]rolling average≤ 1.4 mg/Lall year001
Phosphorus, total [as P]monthly average≤ 23 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Mercury, total recoverabledaily maximum≤ 14 ng/Lall year001
Mercury, total recoverabledaily maximum≤ 14 ng/Lall year001
pH range excursions, > 60 minutesmonthly total≤ 0 occur/dall year001
pH range excursions, monthly total accummonthly total≤ 446 minall year001
Flow, in conduit or thru treatment plantannual averagereport only (MGD)all year701
Flow, in conduit or thru treatment plantannual totalreport only (MGD)Dec701
Flow, in conduit or thru treatment plantannual maximumreport only (MGD)all year701
Mercury, total recoverablequarterly maximumreport only (ng/L)all year701

How strict are these limits?

Cited limits by parameter: Wisconsin's rules and the federal ones.

Same industry: the 22 Paper and Allied Products permits in Wisconsin.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WI0003204 · MCP: https://passage-data.com/mcp