EPA Air · stack tests by county and year

Air-emissions stack tests in Seneca County, Ohio, 2026

• 10Stack 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 Seneca 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 Seneca County facility page.

Seneca County, Ohio, 2026

• Inspections 8
• High-priority violations 3

Air-emissions stack tests in Seneca County, other years

• 2023 6
• 2022 12
• 2021 10
• 2020 18
• 2019 51
• 2018 7
• 2017 30

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

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 Seneca, OH, in 2026. It lists 9 stack tests recorded in 2026.