EPA Air · stack tests by state and year

Air-emissions stack tests in Montana, 2019

272Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Montana during 2019; one facility can appear more than once, because this is a record of what happened rather than a list of places.

Counties in Montana, 2019

Montana, other years

Air-emissions stack tests recorded in Montana, 2019

Date	Facility	Where	Kind	Agency
2019-08-01	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-07-30	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-30	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-30	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-30	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-28	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2019-07-27	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2019-07-27	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2019-07-25	WEYERHAEUSER-CFALLS — high-priority violation on file	COLUMBIA FALLS, Flathead, MT	Pass	State
2019-07-19	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-07-19	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-07-19	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-07-19	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-07-19	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-07-19	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-07-19	N. BORDER PIPELINE CO STA. 3	CULBERTSON, Roosevelt, MT	Pass	State
2019-07-18	PHILLIPS 66 COMPANY - MISSOULA	MISSOULA, Missoula, MT	Pass	State
2019-07-18	PHILLIPS 66 COMPANY - MISSOULA	MISSOULA, Missoula, MT	Pass	State
2019-07-12	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-12	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-12	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-12	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-12	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-12	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-12	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-12	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-10	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2019-07-10	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2019-07-10	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2019-07-09	ASH GROVE CEMENT	CLANCY, Jefferson, MT	Pass	State
2019-07-09	ASH GROVE CEMENT	CLANCY, Jefferson, MT	Pass	State
2019-07-09	ASH GROVE CEMENT	CLANCY, Jefferson, MT	Pass	State
2019-07-09	ASH GROVE CEMENT	CLANCY, Jefferson, MT	Pass	State
2019-07-09	ASH GROVE CEMENT	CLANCY, Jefferson, MT	Pass	State
2019-07-01	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-01	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-01	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-01	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-01	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-01	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-01	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-07-01	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-06-28	PAR MONTANA BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2019-06-28	PAR MONTANA BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2019-06-28	PAR MONTANA BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2019-06-24	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-06-24	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-06-21	WBI SANDSTONE CREEK COMPRESSOR STATION	BAKER, Fallon, MT	Pass	State
2019-06-17	GRAYMONT WESTERN US INC	TOWNSEND, Broadwater, MT	Pass	State
2019-06-17	GRAYMONT WESTERN US INC	TOWNSEND, Broadwater, MT	Pass	State
2019-06-17	BARRICK GOLDEN SUNLIGHT MINE	WHITEHALL, Jefferson, MT	Pass	State
2019-06-13	WILLISTON BASIN - SACO	SACO, Phillips, MT	Pass	State
2019-06-12	WILLISTON BASIN - SACO	SACO, Phillips, MT	Pass	State
2019-06-12	WILLISTON BASIN - SACO	SACO, Phillips, MT	Pass	State
2019-06-11	WILLISTON BASIN - SACO	SACO, Phillips, MT	Pass	State
2019-06-05	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-06-05	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-06-05	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-06-05	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-06-05	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-06-05	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-06-05	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-06-05	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-06-05	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-05-31	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-05-31	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-05-31	WILLISTON BASIN - FORT PECK STATION	NASHUA, Valley, MT	Pass	State
2019-05-31	WILLISTON BASIN - FORT PECK STATION	NASHUA, Valley, MT	Pass	State
2019-05-31	WILLISTON BASIN - FORT PECK STATION	NASHUA, Valley, MT	Pass	State
2019-05-30	DRY CREEK FIELD STATION 056	RED LODGE, Carbon, MT	Pass	State
2019-05-30	DRY CREEK FIELD STATION 056	RED LODGE, Carbon, MT	Pass	State
2019-05-30	DRY CREEK FIELD STATION 056	RED LODGE, Carbon, MT	Pass	State
2019-05-30	WILLISTON BASIN - FORT PECK STATION	NASHUA, Valley, MT	Pass	State
2019-05-28	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2019-05-28	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2019-05-23	IFG-KAMP, LLC	SAINT REGIS, Mineral, MT	Pass	State
2019-05-21	WILLISTON BASIN - HATHAWAY STATION	HATHAWAY, Rosebud, MT	Pass	State
2019-05-21	WBI SANDSTONE CREEK COMPRESSOR STATION	BAKER, Fallon, MT	Pass	State
2019-05-21	WBI SANDSTONE CREEK COMPRESSOR STATION	BAKER, Fallon, MT	Pass	State
2019-05-13	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2019-05-10	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2019-05-06	MALMSTROM AFB	GREAT FALLS, Cascade, MT	Pass	State
2019-05-06	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-05-06	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-05-06	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-05-06	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-05-06	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-05-06	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-05-06	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-05-06	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-04-11	WILLISTON BASIN - LITTLE BEAVER	BAKER, Fallon, MT	Pass	State
2019-04-11	WILLISTON BASIN - BAKER COMPRESSOR STA	BAKER, Fallon, MT	Pass	State
2019-04-11	WBI SANDSTONE CREEK COMPRESSOR STATION	BAKER, Fallon, MT	Pass	State
2019-04-08	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State

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