EPA Air · stack tests by county, year by year
Air-emissions stack tests in Cass County, Iowa, year by year
- 58Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every year on record for Cass County, Iowa, most recent first. Each year page lists the events recorded at sources in the county that year.
Cass County, Iowa, by year
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.