This map shows forecast ground level hourly average Ozone (O3) concentrations (ppb) based on a 12 km grid.   This is an experimental product of the Air Quality Forecast System  by the National Weather Service.  This product is intended to provide guidance to local and state air quality forecasters, and to provide information for people at risk, but does not constitute an air quality warning or alert.  Current community air quality forecasts/alerts are available at the EPA AIRNow web site.