Corona and Temescal Valley are neighboring, diverse communities in western Riverside County, located within the South Coast Air Quality Management District. Despite high median incomes, there are pockets of poverty, and both communities have asthma rates close to the state average. Major air pollution sources include heavy freeway and rail traffic, as well as a high concentration of warehouses that generate diesel. Air quality concerns are heightened by regional smog blown in from the Greater Los Angeles area. 

The district has teamed up with Aclima and the California Air Resources Board (CARB) to launch a community air monitoring project to guiding future actions as a part of SMMI. Using Aclima’s advanced sensors, the project collects detailed, block-by-block data on air quality throughout the community. This provides residents with clear information about local pollution and helps guide actions to improve air quality, focusing on the areas and people most affected.

In April of 2025, residents and stakeholders met to discuss these ongoing air quality challenges and explore solutions for a healthier future.