EPA Air · stack tests by county and year

Air-emissions stack tests in Rosebud County, Montana, 2019

50Stack 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 Rosebud County, Montana during 2019. 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 Rosebud County facility page.

Air-emissions stack tests in Rosebud County, other years

Air-emissions stack tests recorded in Rosebud County, Montana, 2019

Date	Facility	Kind	Agency
2019-12-19	COLSTRIP ENERGY LTD PARTNERSHIP	Pass	State
2019-12-02	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-12-02	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-12-02	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-12-02	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-11-08	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-11-08	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-11-08	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-11-08	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-10-11	WILLISTON BASIN - HATHAWAY STATION	Pass	State
2019-09-08	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-09-06	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-09-06	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-09-06	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-09-06	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-09-06	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-09-06	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-09-06	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-08-01	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-08-01	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-06-24	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-06-24	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-05-31	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-05-31	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-05-21	WILLISTON BASIN - HATHAWAY STATION	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-04-05	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-21	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-11	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-11	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-11	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-03-11	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-01-29	COLSTRIP ENERGY LTD PARTNERSHIP	Pass	State
2019-01-19	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-01-18	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-01-18	COLSTRIP STEAM ELECTRIC STATION	Pass	State
2019-01-18	COLSTRIP STEAM ELECTRIC STATION	Pass	State

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