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Expera Specialty Solutions, LLC

Pulp Mills, major discharger, Mosinee, Wisconsin. NPDES permit WI0003671 expired May 31, 2021; its limits still apply. Last 12 months: over a limit 2 times (last February 2026), 205 required values missing, 17 of 53 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (13 values), outfall 001 form Q quarterly (1 value), outfall 003 form A monthly (8 values), outfall 004 form A monthly (4 values), outfall 007 form A monthly (1 value), outfall 007 form Q quarterly (3 values), and 1 more form
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 221 required values missing, 20 of 60 reports late

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

Period endingParameterReportedLimitOver by
December 2025Phosphorus, total [as P], rolling average6.95≤ 1 mg/L595%
February 2026pH, daily minimum< 1≥ 4 SU—

Limits in force (34)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 3348 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 6534 lb/dall year001
pHdaily minimum≥ 4 SUall year001
pHdaily maximum≤ 11 SUall year001
Solids, total suspendedmonthly average≤ 6968 lb/dall year001
Solids, total suspendeddaily maximum≤ 13392 lb/dall year001
Phosphorus, total [as P]rolling average≤ 1 mg/Lall year001
Copper, total recoverabledaily maximum≤ 38 ug/Lall year001
Copper, total recoverabledaily maximum≤ 3.9 lb/dall year001
Flow, in conduit or thru treatment plant30-day averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Mercury, total recoverablequarterly maximumreport only (ng/L)all year001
pH range excursions, > 60 minutesdaily maximum≤ 0 occur/dall year001
pH range excursions, monthly total accummonthly total≤ 446 minall year001
Temperature, water deg. fahrenheitdaily maximum≤ 125 deg Fall year003
Cadmium, total recoverabledaily maximumreport only (ug/L)all year003
Copper, total recoverableweekly average≤ 8.7 ug/Lall year003
Copper, total recoverableweekly average≤ .27 lb/dall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Chlorine, total residualweekly average≤ 7.3 ug/Lall year003
Chlorine, total residualdaily maximum≤ 38 ug/Lall year003
Temperature, water deg. fahrenheitdaily maximum≤ 125 deg Fall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Chlorine, total residualdaily maximum≤ 38 ug/Lall year004
Temperature, water deg. fahrenheitquarterly maximumreport only (deg F)all year007
Copper, total recoverabledaily maximumreport only (ug/L)all year007
Flow, in conduit or thru treatment plantquarterly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantquarterly maximumreport only (MGD)all year007
Solids, total suspendedquarterly averagereport only (mg/L)all year008
Solids, total suspendedquarterly maximumreport only (mg/L)all year008
Flow, in conduit or thru treatment plantquarterly averagereport only (MGD)all year008
Flow, in conduit or thru treatment plantquarterly maximumreport only (MGD)all year008

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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WI0003671 · MCP: https://passage-data.com/mcp