EPA Air · stack tests by county and year
Air-emissions stack tests in Johnson County, Wyoming, 2026
- 33Stack 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 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 Johnson County facility page.
Air-emissions stack tests in Johnson County, other years
Air-emissions stack tests recorded in Johnson County, Wyoming, 2026
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 stack tests in Johnson county, WY, for 2026 under the Clean Air Act facilities in the EPA air register. It lists 33 stack tests recorded in 2026.