EPA Air · stack tests by county and year
Air-emissions stack tests in Boulder County, Colorado, 2023
- 5Stack 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 Boulder County, Colorado during 2023. 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 Boulder County facility page.
Boulder County, Colorado, 2023
Air-emissions stack tests in Boulder County, other years
Air-emissions stack tests recorded in Boulder County, Colorado, 2023
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2023-10-17 | UNIV OF COLO BOULDER - CAMPUS — high-priority violation on file | N/A | State |
| 2023-09-13 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2023-07-20 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2023-07-19 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Fail | State |
| 2023-03-31 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | 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 Boulder county, CO, in 2023. It lists 5 stack tests recorded in 2023.