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.