Same in the California Bay Area https://www.baaqmd.gov/about-air-quality/current-air-quality/air-monitoring-data/#/airp?id=126&style=chart&zone=-1&date=2020-03

Same in the California Bay Area https://www.baaqmd.gov/about-air-quality/current-air-quality/air-monitoring-data/#/airp?id=126&style=chart&zone=-1&date=2020-03-13&view=weekly https://www.baaqmd.gov/about-air-quality/current-air-quality...