EPA Air · stack tests by county and year

Air-emissions stack tests in Columbiana County, Ohio, 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 Columbiana County, Ohio 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 Columbiana County facility page.

Columbiana County, Ohio, 2026

Air-emissions stack tests in Columbiana County, other years

Air-emissions stack tests recorded in Columbiana County, Ohio, 2026

Date	Facility	Kind	Agency
2026-06-18	S H BELL - STATELINE TERMINAL	Pass	State
2026-06-18	S H BELL - STATELINE TERMINAL	Pass	State
2026-06-18	S H BELL - STATELINE TERMINAL	Pass	State
2026-06-18	S H BELL - STATELINE TERMINAL	Pass	State
2026-06-18	S H BELL - STATELINE TERMINAL	Pass	State
2026-06-18	S H BELL - STATELINE TERMINAL	Pass	State
2026-06-18	S H BELL - STATELINE TERMINAL	Pass	State
2026-06-18	S H BELL - STATELINE TERMINAL	Pass	State
2026-06-18	S H BELL - STATELINE TERMINAL	Pass	State
2026-06-05	HILCORP ENERGY - ELK RUN BAKER PRODUCTION FACILITY	Pass	State
2026-06-05	HILCORP ENERGY - ELK RUN BAKER PRODUCTION FACILITY	Pass	State
2026-06-05	HILCORP ENERGY - ELK RUN BAKER PRODUCTION FACILITY	Pass	State
2026-06-04	HILCORP ENERGY - FAIRFIELD-UNKEFER PRODUCTION FACILITY	Pass	State
2026-06-04	HILCORP ENERGY - FAIRFIELD-UNKEFER PRODUCTION FACILITY	Pass	State
2026-06-04	HILCORP ENERGY - FAIRFIELD-UNKEFER PRODUCTION FACILITY	Pass	State
2026-06-04	HILCORP ENERGY - FAIRFIELD-UNKEFER PRODUCTION FACILITY	Pass	State
2026-06-04	HILCORP ENERGY - FAIRFIELD-UNKEFER PRODUCTION FACILITY	Pass	State
2026-06-04	HILCORP ENERGY - FAIRFIELD-UNKEFER PRODUCTION FACILITY	Pass	State
2026-05-08	EOG RESOURCES, INC. - NORRIS CL WES PAD	Pass	State
2026-05-08	EOG RESOURCES, INC. - NORRIS CL WES PAD	Pass	State
2026-05-08	EOG RESOURCES, INC. - NORRIS CL WES PAD	Pass	State
2026-04-29	HILCORP ENERGY - FAIRFIELD-NOLKER PRODUCTION FACILITY	Pass	State
2026-04-29	HILCORP ENERGY - FAIRFIELD-NOLKER PRODUCTION FACILITY	Pass	State
2026-04-29	HILCORP ENERGY - ELK RUN AUER PRODUCTION FACILITY	Pass	State
2026-04-29	HILCORP ENERGY - ELK RUN AUER PRODUCTION FACILITY	Pass	State
2026-04-29	HILCORP ENERGY - ELK RUN AUER PRODUCTION FACILITY	Pass	State
2026-04-21	HILCORP ENERGY - ELK RUN WERTZ PRODUCTION FACILITY	Pass	State
2026-04-21	HILCORP ENERGY - ELK RUN WERTZ PRODUCTION FACILITY	Pass	State
2026-04-21	HILCORP ENERGY - ELK RUN WERTZ PRODUCTION FACILITY	Pass	State
2026-03-23	HANOVERTON COMPRESSOR STATION	Pass	State
2026-03-23	HANOVERTON COMPRESSOR STATION	Pass	State
2026-03-23	HANOVERTON COMPRESSOR STATION	Pass	State
2026-03-23	HANOVERTON COMPRESSOR STATION	Pass	State
2026-03-23	HANOVERTON COMPRESSOR STATION	Pass	State
2026-03-23	HANOVERTON COMPRESSOR STATION	Pass	State
2026-03-23	HANOVERTON COMPRESSOR STATION	Pass	State
2026-03-23	HANOVERTON COMPRESSOR STATION	Pass	State
2026-03-19	HILCORP ENERGY-FAIRFIELD-TARKA PRODUCTION FACILITY	Pass	State
2026-03-19	HILCORP ENERGY-FAIRFIELD-TARKA PRODUCTION FACILITY	Pass	State
2026-03-19	HILCORP ENERGY-FAIRFIELD-TARKA PRODUCTION FACILITY	Pass	State
2026-03-19	HILCORP ENERGY-FAIRFIELD-TARKA PRODUCTION FACILITY	Pass	State
2026-03-19	HILCORP ENERGY-FAIRFIELD-TARKA PRODUCTION FACILITY	Pass	State
2026-03-19	HILCORP ENERGY-FAIRFIELD-TARKA PRODUCTION FACILITY	Pass	State
2026-03-18	HILCORP ENERGY - ELK RUN-SCHEEL PRODUCTION FACILITY	Pass	State
2026-03-18	HILCORP ENERGY - ELK RUN-SCHEEL PRODUCTION FACILITY	Pass	State
2026-03-18	HILCORP ENERGY - ELK RUN-SCHEEL PRODUCTION FACILITY	Pass	State
2026-03-18	HILCORP ENERGY - ELK RUN-FAIRMONT PRODUCTION FACILITY	Pass	State
2026-03-18	HILCORP ENERGY - ELK RUN-FAIRMONT PRODUCTION FACILITY	Pass	State
2026-03-18	HILCORP ENERGY - ELK RUN-FAIRMONT PRODUCTION FACILITY	Pass	State
2026-02-10	EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION	Pass	State
2026-02-10	EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION	Pass	State
2026-02-10	EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION	Pass	State
2026-02-10	EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION	Pass	State
2026-02-10	EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION	Pass	State
2026-02-10	EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION	Pass	State

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