Current Ozone Conditions in National Parks

This map below is produced by and accessed from the cross-agency US government web site AIRNow in partnership with NPS. The ozone season runs from May to Sept for the detailed current ozone conditions. During the winter more limited numbers of locations and web products are available.

Map of Current Ozone Conditions in National Parks

The color-code dots for parks show the recent hourly ozone as the Air Quality Index (AQI) which uses the chart below.

Air Quality Index