EPA Air · stack tests by county and year
Air-emissions stack tests in Boulder County, Colorado, 2021
- 10Stack 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 2021. 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, 2021
Air-emissions stack tests in Boulder County, other years
Air-emissions stack tests recorded in Boulder County, Colorado, 2021
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2021-07-09 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2021-07-07 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2021-04-03 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2021-04-02 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2021-03-30 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2021-03-05 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2021-03-05 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2021-03-04 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2021-03-04 | CEMEX CONSTRUCTION MATERIALS - LYONS — high-priority violation on file | Pass | State |
| 2021-03-03 | 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.