Sniffing NW Colorado air quality

Data gathered at a new air quality monitoring site in Rangely resulted in an  “ozone action day alert” for western Rio Blanco County in early February.

Ozone alert

In February the CDPHE issued an ozone alert for the afternoon of Feb. 15 through the early morning of Feb. 16. On Feb. 13, ozone levels (one hour averages) reached 93 parts per billion (ppb). On Feb. 14, they reached 91 ppb. On Feb. 15, they reached 91 ppb., and