EPA Air · stack tests by state, industry and year

Utilities (NAICS 2211): stack tests in Montana, 2020

63Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2020 at a Montana source whose primary industry code is NAICS 2211. A facility filing more than one industry code is counted under the first one on its record.

Utilities (NAICS 2211) in Montana, other years

Other industries in Montana, 2020

Air-emissions stack tests recorded in Montana, 2020

Date	Facility	Where	Kind	Agency
2020-12-16	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2020-10-27	BASIN ELECTRIC POWER COOPERATIVE	BAINVILLE, Roosevelt, MT	Pass	State
2020-10-23	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2020-10-13	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-10-02	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-10-02	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-09-30	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Fail	State
2020-09-30	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Fail	State
2020-09-30	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-09-30	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-09-30	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-09-30	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-09-29	ROCKY MOUNTAIN POWER	HARDIN, Big Horn, MT	Pass	State
2020-09-29	ROCKY MOUNTAIN POWER	HARDIN, Big Horn, MT	Pass	State
2020-09-29	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-09-08	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-09-08	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-09-08	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-08-28	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-08-28	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-08-28	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-08-28	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Fail	State
2020-08-28	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-08-28	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-07-29	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2020-07-29	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2020-07-29	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2020-07-29	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2020-07-20	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-04-24	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-04-24	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-04-24	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-04-24	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-04-24	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-04-24	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-04-21	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2020-04-21	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-04-21	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-04-21	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-03-20	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-03-20	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-03-19	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-03-19	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-02-21	MDU - LEWIS & CLARK STATION	SIDNEY, Richland, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-02-19	BASIN CREEK POWER SERVICES	BUTTE, Silver Bow, MT	Pass	State
2020-01-29	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-01-29	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-01-29	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-01-29	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-01-10	YELLOWSTONE POWER PLANT — high-priority violation on file	BILLINGS, Yellowstone, MT	Pass	State
2020-01-02	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-01-02	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-01-02	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State
2020-01-02	COLSTRIP STEAM ELECTRIC STATION	COLSTRIP, Rosebud, MT	Pass	State

Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.