EPA Air · stack tests by county and year
Air-emissions stack tests in Natrona County, Wyoming, 2025
- 22Stack 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 Natrona 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 Natrona County facility page.
Natrona County, Wyoming, 2025
Air-emissions stack tests in Natrona County, other years
Air-emissions stack tests recorded in Natrona 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 covers Clean Air Act facilities in the EPA air register with stack tests in Natrona, WY, in 2025. It lists 22 stack tests recorded in 2025.