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Officials Urge Southern Arizona Residents to Stay Indoors Amid Unhealthy Air Quality

12/23/2025

Summary

Story summary

Unhealthy air quality from fine particle pollution (PM2.5 and PM10) has prompted officials to urge thousands to stay indoors in southern Arizona and Nogales, Mexico.
The AirNow map indicates unhealthy levels in southern Arizona around the Pajarito Mountains.
The Environmental Protection Agency (EPA) states AQI above 150 is unhealthy and advises sensitive groups to avoid outdoor activities.
Residents should monitor AirNow for ongoing updates on air quality.

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Story summary

Unhealthy air quality from fine particle pollution (PM2.5 and PM10) has prompted officials to urge thousands to stay indoors in southern Arizona and Nogales, Mexico.
The AirNow map indicates unhealthy levels in southern Arizona around the Pajarito Mountains.
The Environmental Protection Agency (EPA) states AQI above 150 is unhealthy and advises sensitive groups to avoid outdoor activities.
Residents should monitor AirNow for ongoing updates on air quality.