EPA Air · stack tests by county and year

Air-emissions stack tests in Monroe County, Wisconsin, 2026

20Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Monroe County, Wisconsin during 2026. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Monroe County facility page.

Monroe County, Wisconsin, 2026

Air-emissions stack tests in Monroe County, other years

Air-emissions stack tests recorded in Monroe County, Wisconsin, 2026

Date	Facility	Kind	Agency
2026-07-21	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-07-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-07-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-07-08	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-07-06	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-07-06	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-07-06	WE ENERGIES - VALLEY POWER PLANT	Pass	State
2026-06-22	WMWI - METRO RECYCLING &AMP; DISPOSAL	Pass	State
2026-06-22	WMWI - METRO RECYCLING &AMP; DISPOSAL	Pass	State
2026-06-18	MOLSON COORS USA LLC	Pass	State
2026-06-02	PPG INDUSTRIES — high-priority violation on file	Pass	State
2026-05-27	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-04-27	MMSD-JONES ISLAND WATER RECLAMATION FACILITY	Pass	State
2026-04-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-04-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-04-13	WE ENERGIES - VALLEY POWER PLANT	Pass	State
2026-03-14	U.S. ENERGY MILWAUKEE JONES ISLAND TERMINAL	Pass	State
2026-02-11	BRADY WORLDWIDE - FLORIST AVE PLT	Pass	State
2026-01-19	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State
2026-01-19	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	Pass	State

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.

What this page shows

This page covers Clean Air Act facilities in the EPA air register with stack tests in Monroe, WI, in 2026. It lists 20 stack tests recorded in 2026.