EPA Air · stack tests by county and year
Air-emissions stack tests in Butler County, Kansas, 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 Butler County, Kansas 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 Butler County facility page.
Butler County, Kansas, 2026
Air-emissions stack tests in Butler County, other years
What stands out
- Stack tests in Butler County, Kansas, fell from 12 in 2025, the previous year on file, to 3 in 2026.
- The county’s file for stack tests holds 7 years of events, from 2017 through 2026.
- Its 3 stack tests rank 16th of the 17 county cells in Kansas for 2026.
- Its 3 stack tests are 2% of the 151 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 Butler County, Kansas, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-03-25 | HOLLYFRONTIER EL DORADO REFINERY (AIR) | Pass | State |
| 2026-03-19 | BLUE RIVER VALLEY TERMINAL (AIR) | Pass | State |
| 2026-03-19 | BLUE RIVER VALLEY TERMINAL (AIR) | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.