EPA Air · stack tests by county and year

Air-emissions stack tests in Washington County, Arkansas, 2026

55Stack 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 Washington County, Arkansas 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 Washington County facility page.

Washington County, Arkansas, 2026

Air-emissions stack tests in Washington County, other years

Air-emissions stack tests recorded in Washington County, Arkansas, 2026

Date	Facility	Kind	Agency
2026-07-08	SOUTHWESTERN ELECTIRC POWER COMPANY - HARRY D. MATTISON POWER PLANT	Pass	State
2026-07-07	SOUTHWESTERN ELECTIRC POWER COMPANY - HARRY D. MATTISON POWER PLANT	Pass	State
2026-05-27	UNIVERSITY OF ARKANSAS - FAYETTEVILLE CAMPUS	Pass	State
2026-04-02	U OF A VETERINARY DIAGNOSTIC LABORATORY	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	Pass	State
2026-03-10	APAC CENTRAL, INC. - SHARPS CRUSHER	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 Washington county, AR, for 2026. It lists 55 stack tests recorded in 2026.