EPA Air · stack tests by county and year
Air-emissions stack tests in Mercer County, Kentucky, 2026
- 3Stack 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 Mercer County, Kentucky 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 Mercer County facility page.
Air-emissions stack tests in Mercer County, other years
What stands out
- Stack tests in Mercer County, Kentucky, fell from 5 in 2025, the previous year on file, to 3 in 2026.
- The county’s file for stack tests holds 10 years of events, from 2017 through 2026.
- Its 3 stack tests rank 5th of the 10 county cells in Kentucky for 2026.
- Its 3 stack tests are 3.1% of the 97 the state’s file holds for 2026.
Every line is computed by formula from the state’s stored file; nothing is estimated.
Air-emissions stack tests recorded in Mercer County, Kentucky, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-03-18 | KY UTILITIES CO - BROWN STATION | Pass | State |
| 2026-03-17 | KY UTILITIES CO - BROWN STATION | Pass | State |
| 2026-02-25 | CORNING INCORPORATED | 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 Mercer county, KY, in 2026. It lists 3 stack tests recorded in 2026.