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Boulder hits 98 PPB Boulder one-hour ozone reading hit 98 PPB around 3:30PM on Monday, Feb. 21st. Reading levels steadily dropped after that time as increasing clouds rolled in and covered the sky, going below 75 PPB by 5:30PM. Feb 21 Boulder ozone 1 hour and 8 hour average ozone for Boulder, Wyoming on Monday, Feb. 21st, as of 4:30PM. Info charted from the Wyoming DEQ website dataset. Scroll down for more data about the one-hour ground-level ozone readings for Monday, Feb. 21, 2011.

The U.S. government AirNow air quality monitoring website showed just one orange dot for the entire United States for the 5:00PM hourly ozone reading. An orange dot means "Unhealthy for Sensitive Groups". That one dot was Boulder, Wyoming. The 1-hour reading at 3:45PM was 98 PPB on the Boulder monitoring station. The reading lowered to 89 PPB for the 1-hour and 59 PPB for the 8-hour at 5:00PM according to the DEQ monitor. The 8-hour ozone level reached 77 PPB at 9:30 PM. The EPA standard for 8-hour ozone is 75 PPB. EPA does not have a one-hour standard.

Local health officials recommend anyone with breathing, eye or nose sensitivities stay inside and avoid breathing the outside air or exerting themselves while air pollution levels are higher than optimum.

Click on this link to go to the AirNow website: http://airnow.gov/index.cfm?action=airnow.pointmaps

Click on this website to go to the Wyoming DEQ air quality monitoring website: http://www.wyvisnet.com/

Related Links Boulder 1-hour ozone at 98 PPB at 3:45PM (PDF) - February 21, 2011 Boulder 8-hour ozone at 77 PPB at 9:35PM (PDF) - February 21, 2011 DEQ Boulder Monitoring Station - Boulder, Wyoming Ozone readings rise in the Boulder area - February 15, 2011 - Pinedale Online!