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
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-04-01	WILLISTON BASIN - CABIN CREEK	BAKER, Fallon, MT	Pass	State
2019-04-01	WILLISTON BASIN - CABIN CREEK	BAKER, Fallon, MT	Pass	State
2019-04-01	WILLISTON BASIN - CABIN CREEK	BAKER, Fallon, MT	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-19	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Fail	State
2019-03-19	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Fail	State
2019-03-19	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Fail	State
2019-03-13	WEYERHAEUSER-EVERGREEN — high-priority violation on file	KALISPELL, Flathead, MT	Pass	State
2019-03-11	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-11	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-11	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-11	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-03-08	MSU - CENTRAL HEATING PLANT	BOZEMAN, Gallatin, MT	Pass	State
2019-03-08	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2019-03-08	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2019-03-08	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2019-03-08	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2019-03-08	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2019-03-08	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2019-03-08	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2019-03-08	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2019-03-08	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2019-03-06	TELSTAD FIELD STATION 033	SHELBY, Toole, MT	Pass	State
2019-03-06	TELSTAD FIELD STATION 033	SHELBY, Toole, MT	Pass	State
2019-03-06	TELSTAD FIELD STATION 033	SHELBY, Toole, MT	Pass	State
2019-03-01	WILLISTON BASIN - CABIN CREEK	BAKER, Fallon, MT	Pass	State
2019-03-01	CHS INC REFINERY LAUREL	LAUREL, Yellowstone, MT	Pass	State
2019-02-25	WESTERN SUGAR COOPERATIVE — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2019-02-06	DAVE GATES GENERATING STATION AT MILL CREEK	ANACONDA, Deer Lodge, MT	Pass	State
2019-02-06	DAVE GATES GENERATING STATION AT MILL CREEK	ANACONDA, Deer Lodge, MT	Pass	State
2019-02-06	DAVE GATES GENERATING STATION AT MILL CREEK	ANACONDA, Deer Lodge, MT	Pass	State
2019-02-06	DAVE GATES GENERATING STATION AT MILL CREEK	ANACONDA, Deer Lodge, MT	Pass	State
2019-02-06	DAVE GATES GENERATING STATION AT MILL CREEK	ANACONDA, Deer Lodge, MT	Pass	State
2019-02-04	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-02-04	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-02-04	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-02-04	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-02-04	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-02-04	NORTHWESTERN ENERGY MAINLINE #1	CUT BANK, Glacier, MT	Pass	State
2019-01-31	BILLINGS REFINERY	BILLINGS, Yellowstone, MT	Pass	State
2019-01-31	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2019-01-29	COLSTRIP ENERGY LTD PARTNERSHIP	COLSTRIP, Rosebud, MT	Pass	State
2019-01-28	CALUMET MONTANA REFINING — high-priority violation on file	GREAT FALLS, Cascade, MT	Pass	State
2019-01-28	CALUMET MONTANA REFINING — high-priority violation on file	GREAT FALLS, Cascade, MT	Pass	State
2019-01-28	CALUMET MONTANA REFINING — high-priority violation on file	GREAT FALLS, Cascade, MT	Pass	State
2019-01-28	CALUMET MONTANA REFINING — high-priority violation on file	GREAT FALLS, Cascade, MT	Pass	State
2019-01-28	CALUMET MONTANA REFINING — high-priority violation on file	GREAT FALLS, Cascade, MT	Pass	State
2019-01-28	MALMSTROM AFB	GREAT FALLS, Cascade, MT	Pass	State
2019-01-24	ROCKY MOUNTAIN POWER	HARDIN, Big Horn, MT	Pass	State
2019-01-24	ROCKY MOUNTAIN POWER	HARDIN, Big Horn, MT	Fail	State
2019-01-19	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-01-18	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-01-18	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-01-18	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2019-01-18	MONTANA SULPHUR & CHEMICAL	BILLINGS, Yellowstone, MT	Pass	State
2019-01-14	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2019-01-14	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2019-01-14	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2019-01-14	WESTERN SUGAR COOPERATIVE — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2019-01-09	WILLISTON BASIN - MONARCH STATION	BAKER, Fallon, MT	Pass	State
2019-01-09	WILLISTON BASIN - MONARCH STATION	BAKER, Fallon, MT	Pass	State
2019-01-07	GRAYMONT WESTERN US INC	TOWNSEND, Broadwater, MT	Pass	State
2019-01-07	GRAYMONT WESTERN US INC	TOWNSEND, Broadwater, MT	Pass	State

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