EPA Air · stack tests by county and year

Air-emissions stack tests in Yellowstone County, Montana, 2018

95Stack 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 Yellowstone County, Montana during 2018. 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 Yellowstone County facility page.

Yellowstone County, Montana, 2018

Air-emissions stack tests in Yellowstone County, other years

Air-emissions stack tests recorded in Yellowstone County, Montana, 2018

Date	Facility	Kind	Agency
2018-12-19	CHS INC REFINERY LAUREL	Pass	State
2018-12-10	BILLINGS REFINERY	Fail	State
2018-12-10	BILLINGS REFINERY	Fail	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-10	BILLINGS REFINERY	Pass	State
2018-12-03	WESTERN SUGAR COOPERATIVE — high-priority violation on file	Pass	State
2018-11-28	WESTERN SUGAR COOPERATIVE — high-priority violation on file	Pass	State
2018-11-05	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-11-05	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-10-31	BILLINGS REFINERY	Pass	State
2018-10-31	BILLINGS REFINERY	Pass	State
2018-10-19	CHS INC REFINERY LAUREL	Pass	State
2018-10-19	CHS INC REFINERY LAUREL	Pass	State
2018-10-19	CHS INC REFINERY LAUREL	Pass	State
2018-10-19	CHS INC REFINERY LAUREL	Pass	State
2018-09-21	BILLINGS REFINERY	Fail	State
2018-09-21	BILLINGS REFINERY	Fail	State
2018-09-21	CHS INC REFINERY LAUREL	Pass	State
2018-09-21	CHS INC REFINERY LAUREL	Pass	State
2018-09-14	PAR MONTANA BILLINGS REFINERY	Pass	State
2018-09-10	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-09-07	CHS INC REFINERY LAUREL	Pass	State
2018-09-07	CHS INC REFINERY LAUREL	Pass	State
2018-09-07	CHS INC REFINERY LAUREL	Pass	State
2018-08-27	CHS INC REFINERY LAUREL	Pass	State
2018-08-24	CHS INC REFINERY LAUREL	Pass	State
2018-08-24	CHS INC REFINERY LAUREL	Pass	State
2018-08-24	CHS INC REFINERY LAUREL	Pass	State
2018-08-24	CHS INC REFINERY LAUREL	Pass	State
2018-08-24	CHS INC REFINERY LAUREL	Pass	State
2018-08-24	CHS INC REFINERY LAUREL	Pass	State
2018-08-24	CHS INC REFINERY LAUREL	Pass	State
2018-08-24	CHS INC REFINERY LAUREL	Pass	State
2018-08-02	BILLINGS TRANSPORTATION OPERATIONS	Pass	State
2018-07-31	CHS INC REFINERY LAUREL	Pass	State
2018-07-31	CHS INC REFINERY LAUREL	Pass	State
2018-07-31	CHS INC REFINERY LAUREL	Pass	State
2018-07-31	CHS INC REFINERY LAUREL	Pass	State
2018-07-30	BILLINGS REFINERY	Pass	State
2018-07-23	PAR MONTANA BILLINGS REFINERY	Pass	State
2018-07-23	PAR MONTANA BILLINGS REFINERY	Pass	State
2018-06-28	PAR MONTANA BULK TERMINAL	Pass	State
2018-06-22	BILLINGS REFINERY	Pass	State
2018-05-24	CHS INC REFINERY LAUREL	Pass	State
2018-05-24	CHS INC REFINERY LAUREL	Pass	State
2018-05-24	CHS INC REFINERY LAUREL	Pass	State
2018-05-24	CHS INC REFINERY LAUREL	Pass	State
2018-05-19	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-05-19	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-05-19	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-05-19	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-05-18	CHS INC REFINERY LAUREL	Pass	State
2018-05-18	CHS INC REFINERY LAUREL	Pass	State
2018-05-18	CHS INC REFINERY LAUREL	Pass	State
2018-05-18	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-05-17	CHS INC REFINERY LAUREL	Fail	State
2018-05-03	CHS INC REFINERY LAUREL	Pass	State
2018-05-03	CHS INC REFINERY LAUREL	Pass	State
2018-05-03	CHS INC REFINERY LAUREL	Pass	State
2018-05-03	CHS INC REFINERY LAUREL	Pass	State
2018-05-03	CHS INC REFINERY LAUREL	Pass	State
2018-05-03	CHS INC REFINERY LAUREL	Pass	State
2018-04-30	BILLINGS REFINERY	Pass	State
2018-04-30	BILLINGS REFINERY	Fail	State
2018-04-30	BILLINGS REFINERY	Fail	State
2018-04-09	BILLINGS REFINERY	Fail	State
2018-03-27	CHS INC REFINERY LAUREL	Pass	State
2018-03-27	CHS INC REFINERY LAUREL	Pass	State
2018-03-09	MONTANA SULPHUR & CHEMICAL	Pass	State
2018-03-05	BILLINGS REFINERY	Pass	State
2018-03-05	BILLINGS REFINERY	Pass	State
2018-03-05	BILLINGS REFINERY	Pass	State
2018-02-21	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-02-21	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-02-21	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2018-02-12	BILLINGS REFINERY	Pass	State
2018-02-12	BILLINGS REFINERY	Pass	State
2018-02-12	BILLINGS REFINERY	Pass	State
2018-02-12	BILLINGS REFINERY	Pass	State
2018-01-31	BILLINGS REFINERY	Pass	State
2018-01-31	BILLINGS REFINERY	Pass	State
2018-01-11	WESTERN SUGAR COOPERATIVE — high-priority violation on file	Pass	State
2018-01-11	WESTERN SUGAR COOPERATIVE — high-priority violation on file	Pass	State
2018-01-11	WESTERN SUGAR COOPERATIVE — 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.