EPA Air · stack tests by county and year

Air-emissions stack tests in Yellowstone County, Montana, 2017

105Stack 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 2017. 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, 2017

Air-emissions stack tests in Yellowstone County, other years

Air-emissions stack tests recorded in Yellowstone County, Montana, 2017

Date	Facility	Kind	Agency
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Fail	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-26	BILLINGS REFINERY	Pass	State
2017-12-10	BILLINGS REFINERY	Pass	State
2017-11-13	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-11-10	CHS INC REFINERY LAUREL	Pass	State
2017-10-23	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-10-23	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-10-23	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-09-26	PAR MONTANA BILLINGS REFINERY	Pass	State
2017-09-25	PAR MONTANA BILLINGS REFINERY	Pass	State
2017-09-11	CHS INC REFINERY LAUREL	Pass	State
2017-09-11	CHS INC REFINERY LAUREL	Pass	State
2017-09-11	CHS INC REFINERY LAUREL	Pass	State
2017-09-11	CHS INC REFINERY LAUREL	Pass	State
2017-09-11	CHS INC REFINERY LAUREL	Pass	State
2017-09-11	CHS INC REFINERY LAUREL	Pass	State
2017-09-11	CHS INC REFINERY LAUREL	Pass	State
2017-08-14	BILLINGS REFINERY	Pass	State
2017-08-14	BILLINGS REFINERY	Pass	State
2017-08-11	CHS INC REFINERY LAUREL	Pass	State
2017-07-21	PAR MONTANA BILLINGS REFINERY	Pass	State
2017-07-20	CHS INC REFINERY LAUREL	Pass	State
2017-07-20	CHS INC REFINERY LAUREL	Pass	State
2017-07-20	CHS INC REFINERY LAUREL	Pass	State
2017-07-20	CHS INC REFINERY LAUREL	Pass	State
2017-07-20	CHS INC REFINERY LAUREL	Pass	State
2017-07-20	CHS INC REFINERY LAUREL	Pass	State
2017-07-20	CHS INC REFINERY LAUREL	Pass	State
2017-07-20	CHS INC REFINERY LAUREL	Pass	State
2017-07-14	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-07-14	YELLOWSTONE POWER PLANT — high-priority violation on file	Fail	State
2017-07-14	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-07-14	YELLOWSTONE POWER PLANT — high-priority violation on file	Fail	State
2017-07-12	PAR MONTANA BULK TERMINAL	Pass	State
2017-07-07	CHS INC REFINERY LAUREL	Pass	State
2017-07-07	CHS INC REFINERY LAUREL	Pass	State
2017-07-07	CHS INC REFINERY LAUREL	Pass	State
2017-07-07	CHS INC REFINERY LAUREL	Pass	State
2017-07-07	CHS INC REFINERY LAUREL	Pass	State
2017-06-16	CHS INC REFINERY LAUREL	Pass	State
2017-06-16	CHS INC REFINERY LAUREL	Pass	State
2017-06-16	CHS INC REFINERY LAUREL	Pass	State
2017-06-16	CHS INC REFINERY LAUREL	Pass	State
2017-06-16	CHS INC REFINERY LAUREL	Pass	State
2017-06-16	CHS INC REFINERY LAUREL	Pass	State
2017-05-30	CHS INC REFINERY LAUREL	Pass	State
2017-05-30	CHS INC REFINERY LAUREL	Pass	State
2017-05-30	CHS INC REFINERY LAUREL	Pass	State
2017-05-26	CHS INC REFINERY LAUREL	Pass	State
2017-05-26	CHS INC REFINERY LAUREL	Pass	State
2017-05-26	CHS INC REFINERY LAUREL	Pass	State
2017-05-26	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-05-11	CHS INC REFINERY LAUREL	Pass	State
2017-05-11	CHS INC REFINERY LAUREL	Pass	State
2017-05-11	CHS INC REFINERY LAUREL	Pass	State
2017-05-11	CHS INC REFINERY LAUREL	Pass	State
2017-05-11	CHS INC REFINERY LAUREL	Pass	State
2017-05-11	CHS INC REFINERY LAUREL	Pass	State
2017-05-10	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-05-10	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-05-10	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-05-10	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-05-04	PAR MONTANA BILLINGS REFINERY	Pass	State
2017-05-04	PAR MONTANA BILLINGS REFINERY	Pass	State
2017-05-04	PAR MONTANA BILLINGS REFINERY	Pass	State
2017-04-27	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-04-18	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-04-18	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-04-17	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-03-17	BILLINGS REFINERY	Pass	State
2017-03-17	BILLINGS REFINERY	Pass	State
2017-03-16	BILLINGS REFINERY	Pass	State
2017-03-16	BILLINGS REFINERY	Pass	State
2017-02-22	YELLOWSTONE POWER PLANT — high-priority violation on file	Fail	State
2017-02-12	BILLINGS REFINERY	Pass	State
2017-02-08	WESTERN SUGAR COOPERATIVE — high-priority violation on file	Pass	State
2017-02-08	WESTERN SUGAR COOPERATIVE — high-priority violation on file	Pass	State
2017-02-03	MONTANA SULPHUR & CHEMICAL	Pass	State
2017-01-31	BILLINGS REFINERY	Pass	State
2017-01-31	BILLINGS REFINERY	Pass	State
2017-01-31	BILLINGS REFINERY	Pass	State
2017-01-31	BILLINGS REFINERY	Pass	State
2017-01-25	WESTERN SUGAR COOPERATIVE — high-priority violation on file	Pass	State
2017-01-18	BILLINGS REFINERY	Pass	State
2017-01-18	BILLINGS REFINERY	Pass	State
2017-01-17	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-01-17	YELLOWSTONE POWER PLANT — high-priority violation on file	Pass	State
2017-01-13	BILLINGS REFINERY	Pass	State

Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.