EPA Air · stack tests by county, year by year
Air-emissions stack tests in Hardin County, Iowa, year by year
- 167Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every year on record for Hardin County, Iowa, most recent first. Each year page lists the events recorded at sources in the county that year.
Hardin County, Iowa, by year
All sources in Hardin County →
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.