Velarion Records

EPA Air · stack tests by county, year by year

Air-emissions stack tests in Madera County, California, year by year

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

Madera County, California, by year

All sources in Madera County →

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