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Air pollution building up Friday along the Wasatch Front

Utahns who are sensitive to smog should stay indoors, and motorists were advised to reduce trips or take public transit on Friday as air pollution worsened along the Wasatch Front.

According to the Utah Department of Environmental Quality, Cache County’s PM 2.5 (fine particulate) level was at orange — “unhealthy for sensitive groups” — while Salt Lake County’s level dropped from orange to yellow, or “moderate,” as of 7 a.m. Friday. Davis, Utah and Weber counties also were at “moderate” pollution. Burn restrictions were in effect throughout northern Utah.

“Persistent temperature inversions across northern Utah valleys will result in degraded air quality and patchy fog through Saturday,” a Friday weather bulletin stated.