EPA Air · stack tests by county and year

Air-emissions stack tests in Natrona County, Wyoming, 2023

18Stack 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 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 Natrona County facility page.

Natrona County, Wyoming, 2023

Air-emissions stack tests in Natrona County, other years

Air-emissions stack tests recorded in Natrona County, Wyoming, 2023

Date	Facility	Kind	Agency
2023-12-04	CASPER REFINERY (HF SINCLAIR CASPER REFINING LLC) — high-priority violation on file	Pass	State
2023-11-02	CASPER REFINERY (HF SINCLAIR CASPER REFINING LLC) — high-priority violation on file	Pass	State
2023-10-31	CASPER REFINERY (HF SINCLAIR CASPER REFINING LLC) — high-priority violation on file	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-10-12	CASPER COMPRESSOR STATION (TALLGRASS INTERSTATE GAS TRANSMISSION)	Pass	State
2023-09-11	CASPER REFINERY (HF SINCLAIR CASPER REFINING LLC) — high-priority violation on file	Pass	State
2023-09-11	CASPER REFINERY (HF SINCLAIR CASPER REFINING LLC) — high-priority violation on file	Pass	State
2023-09-11	CASPER REFINERY (HF SINCLAIR CASPER REFINING LLC) — 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

The page covers stack tests for Clean Air Act facilities in the EPA air register in Natrona, WY, in 2023. It lists 18 stack tests recorded in 2023.