EPA Air · stack tests by county and year

Air-emissions stack tests in Armstrong County, Pennsylvania, 2026

17Stack 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 Armstrong County, Pennsylvania 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 Armstrong County facility page.

Armstrong County, Pennsylvania, 2026

Air-emissions stack tests in Armstrong County, other years

Air-emissions stack tests recorded in Armstrong County, Pennsylvania, 2026

Date	Facility	Kind	Agency
2026-06-25	PEOPLES NATURAL GAS CO LLC/VALLEY STA	Pass	State
2026-06-10	PEOPLES NATURAL GAS CO LLC/BELKNAP COMP STA	Pass	State
2026-05-20	SNYDER BROS INC/ENSIGN COMPRESSOR STATION	Pass	State
2026-05-14	SNYDER BROS INC/FURNACE RUN COMP STA	Pass	State
2026-04-30	EASTERN GAS TRANS & STORAGE/RURAL VLY COMP STA	Pass	State
2026-04-21	PEOPLES NATURAL GAS CO LLC/GIRTY STA	Pass	State
2026-04-16	EQM GATHERING OPCO LLC/TERRA COMP STA	Pass	State
2026-04-07	LEADING TECH/LEECHBURG	Pass	State
2026-03-25	EASTERN GAS TRANS & STORAGE INC/SOUTH BEND COMP STA	Pass	State
2026-03-23	PINE RUN MIDSTREAM LLC/TROUT COMP STA	Pass	State
2026-03-13	KEYSTONE CONEMAUGH PROJ LLC/KEYSTONE STATION	Pass	State
2026-03-13	SNYDER BROS INC/WHITE COMP STA	Pass	State
2026-03-05	SNYDER BROS INC/AMBROSE COMP STA	Pass	State
2026-02-16	DIVERSIFIED PROD CO LLC/STATE GAME LANDS COMP STA	Pass	State
2026-01-16	SNYDER BROS INC/MUSHROOM MINE COMP STA	Pass	State
2026-01-15	EXCO APPALACHIA MIDSTREAM LLC/POVERTY HILL COMP STA	Pass	State
2026-01-12	INFINITY NATURAL RESOURCES SOUTH BEND COMP STA	Pass	State

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