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Air Quality Alert Issued for Over 1 Million in Pennsylvania

2/17/2026

Summary

Story summary

The National Weather Service issued an air quality alert for more than one million residents in Pennsylvania, including the Susquehanna Valley, advising avoidance of strenuous outdoor activity.
As of February 17, 2026, the Environmental Protection Agency's AirNow Map shows the air quality as "unhealthy for sensitive groups" for the elderly, children, and people with heart or lung conditions.
The alert results from elevated PM2.5 levels in the atmosphere.

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Story summary

The National Weather Service issued an air quality alert for more than one million residents in Pennsylvania, including the Susquehanna Valley, advising avoidance of strenuous outdoor activity.
As of February 17, 2026, the Environmental Protection Agency's AirNow Map shows the air quality as "unhealthy for sensitive groups" for the elderly, children, and people with heart or lung conditions.
The alert results from elevated PM2.5 levels in the atmosphere.