EPA Air · stack tests by county, year by year
Air-emissions stack tests in Cook County, Illinois, year by year
- 177Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every year on record for Cook County, Illinois, most recent first. Each year page lists the events recorded at sources in the county that year.
Cook County, Illinois, by year
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.