EPA Air · stack tests by county, year by year
Air-emissions stack tests in Orange County, California, year by year
- 375Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every year on record for Orange County, California, most recent first. Each year page lists the events recorded at sources in the county that year.
Orange County, California, by year
All sources in Orange County →
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.