EPA Air · stack tests by county, year by year

Air-emissions stack tests in Champaign County, Illinois, year by year

• 28Stack tests

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

Champaign County, Illinois, by year

• 2026 11
• 2025 4
• 2023 3
• 2022 3
• 2020 7

All sources in Champaign County →

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