EPA Air · stack tests by county and year
Air-emissions stack tests in Natrona County, Wyoming, 2021
- 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 Natrona County, Wyoming 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 Natrona County facility page.
Natrona County, Wyoming, 2021
Air-emissions stack tests in Natrona County, other years
What stands out
- Stack tests in Natrona County, Wyoming, fell from 8 in 2020, the previous year on file, to 5 in 2021.
- The county’s file for stack tests holds 9 years of events, from 2017 through 2025.
- Its 5 stack tests rank 11th of the 15 county cells in Wyoming for 2021.
- Its 5 stack tests are 2.1% of the 235 the state’s file holds for 2021.
Every line is computed by formula from the state’s stored file; nothing is estimated.
Air-emissions stack tests recorded in Natrona County, Wyoming, 2021
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2021-10-08 | CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION) | Pass | State |
| 2021-08-16 | BUCKNUM BENTONITE PLANT (TOLSA WYOMING BENTONITE CORP.) | Pass | State |
| 2021-07-13 | CASPER REFINERY (HF SINCLAIR CASPER REFINING LLC) — high-priority violation on file | Pass | State |
| 2021-02-17 | HOSPITAL WASTE INCINERATOR (BANNER HEALTH) — high-priority violation on file | Fail | State |
| 2021-02-17 | HOSPITAL WASTE INCINERATOR (BANNER HEALTH) — high-priority violation on file | Fail | 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 Natrona, WY, in 2021. It lists 5 stack tests recorded in 2021.