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.