EPA Air · stack tests by county and year

Air-emissions stack tests in Johnson County, Texas, 2025

• 7Stack 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 Johnson County, Texas during 2025. 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 Johnson County facility page.

Johnson County, Texas, 2025

• Inspections 7

Air-emissions stack tests in Johnson County, other years

• 2026 10
• 2024 9
• 2022 8
• 2021 32
• 2020 6
• 2019 9
• 2018 13
• 2017 6

Air-emissions stack tests recorded in Johnson County, Texas, 2025

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

What this page shows

The page covers Clean Air Act facilities in the EPA air register with stack tests in Johnson county, TX, in 2025. Stack tests recorded in 2025: 7.