Air in San Diego County remains unhealthy, especially in Oceanside and Chula Vista, said Bill Brick, senior meteorologist for the Air Pollution Control District.
Because of the smoke, ash and winds, people in affected areas were urged to be cautious and to avoid unnecessary outdoor activities, the Ventura County Air Pollution Control District said.
District Circuit Appeals Court-rejected Cross-State Air Pollution Rule and the Mercury Air Toxics Standard, are heavily premised upon condemnation of PM2.5 as a killer.