Summary
People in parts of Oregon and Montana are being asked to stay inside due to poor air quality. The Environmental Protection Agency (EPA) reports that fine particle pollution, known as PM2.5, has reached levels considered "unhealthy."
Key Facts
- Parts of Oregon and Montana have "unhealthy" air quality due to fine particle pollution (PM2.5).
- The pollution levels were recorded as of January 28, 2026, according to the EPA's AirNow Map.
- PM2.5 are tiny particles, smaller than a strand of hair, that can be inhaled into the lungs or bloodstream.
- High levels of PM2.5 can worsen heart and lung conditions and cause symptoms like coughing and shortness of breath.
- The EPA advises sensitive groups (older adults, children, and those with heart or lung issues) to avoid outdoor activities.
- People are encouraged to use air purifiers indoors and avoid burning materials to keep indoor air clean.
- PM2.5 can come from sources like wildfires, vehicle emissions, and industrial activities.
- The EPA uses the Air Quality Index (AQI) to communicate air quality levels, with scores indicating the severity of pollution.
