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.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in Boulder county, CO, in 2021. It lists 10 stack tests recorded in 2021.