Santa Ana, located in Orange County and part of the South Coast Air Quality Management District, is a diverse community facing significant air pollution challenges from multiple sources, including busy freeways, industrial corridors, and proximity to John Wayne Airport. These pollution burdens contribute to high rates of asthma, low birth weight, and cardiovascular disease, especially in neighborhoods like Madison Park.

The city has teamed up with Aclima and the California Air Resources Board (CARB) to launch a community air monitoring project 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, Santa Ana residents and stakeholders gathered to discuss these ongoing air quality concerns and explore solutions to improve public health and environmental justice in the city.