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Environmental compliance · county

Environmental compliance in Winnebago County

795 active EPA-regulated sites in Winnebago County, Wisconsin: 32 with an identified violation, 4 in significant violation, 132 inspections and $5.5 million in penalties over five years — EPA ECHO, as of October 18, 2026.

Cite: FACTANKER, https://factanker.com/us/wi/winnebago-county/environmental-compliance

How many facilities in Winnebago County, Wisconsin are regulated by the EPA, and how many are in violation (as of October 18, 2026)?

MeasureValue
Active EPA-regulated sites795
Sites with an identified violation32
Sites in significant violation4
Inspections and evaluations, last 5 years132
Formal enforcement actions, last 5 years20
Penalties, last 5 years (shared federal cases once)$5.5 million

How many active facilities in Winnebago County, Wisconsin fall under each EPA program?

A facility can be in several programs.

ProgramActive sites
Air (Clean Air Act)44
Water discharge permits (Clean Water Act, NPDES)231
Hazardous waste (RCRA)452
Drinking water systems (SDWA)132
Toxics Release Inventory reporters30
Greenhouse gas reporters (GHGRP)5

Which large facilities in Winnebago County, Wisconsin does the EPA track, and are they in violation?

FacilityCompliance statusQuarters in violation (of 12)Penalties, 5 years
NEENAH FOUNDRY CO - PLANTS 2 AND 3
Neenah, WI
Significant Violation12–
PIONEER METAL FINISHING CORP - OSHKOSH DIV
Oshkosh, WI
Significant Violation12–
OSHKOSH WASTEWATER TREATMENT PLANT
Oshkosh, WI
Significant Violation3–
SCA TISSUE MENASHA PAPER MILL
Menasha, WI
Violation Identified9–
NEENAH INC
Neenah, WI
Violation Identified8–
NEENAH-MENASHA SEWERAGE COMMISSION WWTF
Menasha, WI
Violation Identified8–
GRAND CHUTE-MENASHA WEST SEWER
Neenah, WI
Violation Identified7–
A. P. NONWEILER CO., INC.
Oshkosh, WI
No Violation Identified6$17,500
PIERCE MFG INC
Appleton, WI
Violation Identified4–
BEMIS PACKAGING INC - OSHKOSH NORTH
Oshkosh, WI
No Violation Identified2–
QUALITY PAINT AND COATINGS
Oshkosh, WI
No Violation Identified2–
CORRIM COMPANY FRP LLC
Oshkosh, WI
No Violation Identified1–
ESSITY PROFESSIONAL HYGIENE NORTH AMERICA LLC
Menasha, WI
No Violation Identified1–
OSHKOSH CORP - WEST PLT
Oshkosh, WI
No Violation Identified1–
SUN CHEMICAL - MENASHA
Menasha, WI
No Violation Identified1–
WPL - NEENAH GENERATING STATION
Neenah, WI
Violation Identified1–
AMCOR PACKAGING, INC.
Oshkosh, WI
No Violation Identified0–
FOX RIVER VALLEY ETHANOL, LLC
Oshkosh, WI
No Violation Identified0–
FOX RIVER VALLEY ETHANOL LLC - PICKETT
Pickett, WI
No Violation Identified0–
GENERAC POWER SYSTEMS INC -OSHKOSH FACILITY
Oshkosh, WI
No Violation Identified0–
OSHKOSH CORP - OAKWOOD FACILITY
Oshkosh, WI
No Violation Identified0–
OSHKOSH CORPORATION - DEFENSE PLANT
Oshkosh, WI
No Violation Identified0–
OSHKOSH CORP - SOUTH PLANT
Oshkosh, WI
No Violation Identified0–
OSHKOSH TRUCK CORP. - NORTH PLANT
Oshkosh, WI
No Violation Identified0–
THREE PETALS RNG LLC
Berlin, WI
No Violation Identified0–
US PAPER MILLS CORP. - MENASHA MILL
Menasha, WI
No Violation Identified0–
WINNEBAGO COUNTY LANDFILL
Oshkosh, WI
No Violation Identified0–

All figures for Winnebago County · Wisconsin · United States

EPA Enforcement and Compliance History Online (ECHO), weekly national export. Counts cover active sites in the Facility Registry Service; inspections, formal actions and penalties cover the last five years, quarters in violation the last three years. The EPA attributes a case that covers several facilities to each of them; area penalty totals here count an amount shared through the same federal case once, facility figures show the amount attributed to that facility. Large facilities are Clean Air Act majors, Clean Water Act majors and large hazardous waste generators or handlers. Source record.

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