Winter Ozone

In 2005, the AQD recorded elevated ozone levels in the Upper Green River Basin. We know that the ozone exceedances are related to at least four factors: adequate amounts of precursor chemicals, snow cover, temperature inversions and low winds, and sunlight.

In the time since then, DEQ has been working to lower the ozone levels, conducting a series of studies on the area. This page is intended to provide the public and industry with information about past and current work, background information related to the ozone issue, current ozone data, technical documents and forms. 

Announcements

Primary Point of Contact to Improve Communication

In response to input received from the public, the DEQ is implementing a plan to improve communication relating to ozone and the Upper Green River Basin.  Brian Hall, DEQ Outreach Program Manager, will be the primary point of contact.  Brian will serve as the point of contact with respect to calls, emails and fulfillment of data requests relating to ozone and the Upper Green River Basin.  Brian can be reached at ozone@wyo.gov or (307) 777-7753.  Click Here to file a Records Request.

 

Winter Ozone Season Communication

In response to input received from the public, the DEQ is implementing a plan to improve communication during the 2018 Winter Ozone Season (January – March).  Every other week throughout the Winter Ozone Season the DEQ will be communicating on topics relating to ozone and the Upper Green River Basin.  DEQ gathered video footage of the Pre-Winter Ozone Season Open House in an effort to provide highlights for those who were unable to attend.

 

Ozone Outlooks

New for 2018 Winter Ozone Season - AQD will issue an Ozone Outlook for the UGRB when weather conditions are forecasted to persist for multiple days that may be conducive for ozone formation.  AQD will issue an Ozone Outlook 48 hours in advance of the first day of the Ozone Outlook.  When an Ozone Outlook is issued, it is intended to assist the community to prepare accordingly (e.g., postpone non-essential activities until after or complete essential activities prior) for the days included in the Ozone Outlook to voluntarily reduce emissions.  Please remember that current information on ozone levels at the AQD’s monitoring stations can be found at www.wyvisnet.com

 

Ozone Action Day Notifications

AQD will provide the community with Ozone Action Day notifications when they are issued.  AQD will issue an Ozone Action Day one day in advance when forecast weather conditions appear favorable for the formation of elevated ozone the following day.  Ozone Contingency Plans should be implemented upon one-day notice and everyone is encouraged to voluntarily reduce emissions. 

New for 2018 Winter Ozone Season – everyone is encouraged to implement contingency plans and continue to reduce emissions on the day after an Ozone Action Day.  

New for 2018 Winter Ozone Season – a public-oriented Ozone Contingency Plan form is available for residents and small businesses in the UGRB.

Please remember that current information on ozone levels at the AQD’s monitoring stations can be found at www.wyvisnet.com

Note: AQD winter ozone forecasting only takes place from January through March of each calendar year. 

For more information about Winter Ozone Updates, please call 1-888-WYO-WDEQ.