Arizona's new ozone pollution plan for Gila County is now official
What happened
US environmental regulators approved Arizona's updated plan for controlling ozone pollution in Gila County. This means industries in that area must now follow the specific pollution control measures outlined in Arizona's revised plan.
Why it matters
For years, industries in areas with bad air quality could argue about what pollution controls were 'reasonable.' This approval means Arizona's specific plan for Gila County is now legally binding. Companies there must now implement the controls the state outlined.
The signal
Watch whether Gila County's ozone levels begin to drop, or if local industries challenge the specific control measures in court.