EPA Air · stack tests by county and year
Air-emissions stack tests in Johnson County, Wyoming, 2025
- 39Stack 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 Johnson County, Wyoming during 2025. 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 Johnson County facility page.
Air-emissions stack tests in Johnson County, other years
Air-emissions stack tests recorded in Johnson County, Wyoming, 2025
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page from the EPA air register covers Clean Air Act facilities with stack tests in Johnson county, WY, in 2025. It lists 39 stack tests recorded in that year.