EPA Air · stack tests by county and year

Air-emissions stack tests in Ada County, Idaho, 2026

20Stack 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 Ada County, Idaho during 2026. 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 Ada County facility page.

Ada County, Idaho, 2026

Air-emissions stack tests in Ada County, other years

Air-emissions stack tests recorded in Ada County, Idaho, 2026

Date	Facility	Kind	Agency
2026-07-02	PREMIER LLC - PLEASANT VALLEY ROAD	Pending	State
2026-06-25	STAKER AND PARSON COMPANIES DBA IDAHO MATERIALS AND CONSTRUCTION 00407	Pass	State
2026-06-24	STAKER AND PARSON COMPANIES DBA IDAHO MATERIALS AND CONSTRUCTION 00406	Pass	State
2026-06-17	SUPERIOR BLASTING INC 00708	Pass	State
2026-06-02	KNIFE RIVER CORP - MTN WEST 00051	Pass	State
2026-04-30	WESTERN CONSTRUCTION - BOISE	Pass	State
2026-04-30	WESTERN CONSTRUCTION 00098	Pass	State
2026-04-30	WESTERN CONSTRUCTION 00604	Pass	State
2026-04-30	WESTERN CONSTRUCTION 00605	Pass	State
2026-04-30	WESTERN CONSTRUCTION INC 00680	Pass	State
2026-04-30	WESTERN CONSTRUCTION INC 00682	Pass	State
2026-04-30	WESTERN CONSTRUCTION INC 00683	Pass	State
2026-03-24	STAKER AND PARSON COMPANIES DBA IDAHO MATERIALS AND CONSTRUCTION 00407	Pass	State
2026-03-12	H & B CRUSHING 00380	Pass	State
2026-03-12	H & B CRUSHING 00595	Pending	State
2026-03-12	H & B CRUSHING 00596	Pass	State
2026-03-12	H & B CRUSHING 00597	Pass	State
2026-03-12	H & B CRUSHING 00598	Pass	State
2026-03-12	H & B CRUSHING 00615	Pass	State
2026-03-03	PREMIER LLC 00706	Pass	State

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

What this page shows

This page covers Clean Air Act facilities in the EPA air register with stack tests in Ada county, ID, in 2026. It lists 20 stack tests recorded in 2026.