Has Utah’s inversion season arrived? Proof is in the pollution. Just look outside.

Utah’s inversion season officially started Nov. 1, and, almost on cue, Salt Lake County’s first inversion of 2019-20 began building that afternoon.

Over the weekend, state regulators advised Wasatch Front resident to take voluntary actions to reduce the emissions that contribute to the thickening fine particulate matter, or PM2.5, visibly piling up in the haze seen Monday over the Salt Lake Valley.

For Salt Lake County residents, that call triggered a mandatory burn ban that is expected to remain in effect for the next several days while stagnant weather persists.