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Primary air pollutant in the Challis area:
PM2.5 - 131 Unhealthy for Sensitive Groups
People with heart or lung disease, older adults, children and teens – take any of these steps to reduce your exposure:
Primary Pollutant: PM2.5 - 62 Moderate
Primary Pollutant: PM2.5 - 66 Moderate
Primary Pollutant: PM2.5 - 68 Moderate
Primary Pollutant: PM2.5 - 64 Moderate