EPA Air · stack tests by county, year by year

Air-emissions stack tests in Durham County, North Carolina, year by year

• 31Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every year on record for Durham County, North Carolina, most recent first. Each year page lists the events recorded at sources in the county that year.

Durham County, North Carolina, by year

• 2025 7
• 2024 4
• 2023 3
• 2022 5
• 2021 4
• 2019 3
• 2018 5

All sources in Durham County →

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