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Dangerous Particle Pollution Triggers Health Warnings Across 3 States
12 Nov
Summary
- Unhealthy air quality levels detected in parts of Arizona, California, and Oregon
- EPA advises sensitive groups to avoid prolonged outdoor activities
- Air pollution heightens health risks for vulnerable populations
As of November 12th, 2025, multiple pockets of fine particle (PM2.5) pollution have been detected in the "unhealthy" category across parts of three states. The AirNow live map shows these concerning air quality levels centered around Payson, Arizona, as well as along the border between California and Oregon, encompassing areas like Red Rock Valley, Butte Valley, Tule Lake National Wildlife Refuge, Langell Valley, Spring Lake Valley, and regions around Klamath Falls.
At these air pollution levels, the Environmental Protection Agency (EPA) is advising sensitive groups, such as older adults, children, and individuals with respiratory illnesses, to avoid prolonged or intense outdoor activities and consider moving or rescheduling them indoors. The EPA also recommends the general population to reduce long or intense outdoor activities and take more breaks.
Officials and experts warn that the deteriorating air quality heightens health risks for vulnerable populations. AirNow, a partnership between the EPA, National Oceanic and Atmospheric Administration, and other agencies, is the source of the air quality data.
