Description: <A href="https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B2666B6DA-07AD-4CAA-9DEB-E90798D828B8%7D">Full Metadata</A> This web service layer displays areas identified in the U.S. where sulfur oxide levels have not met the National Ambient Air Quality Standards (NAAQS) established in 2010 for sulfur oxides and have been designated "nonattainment” areas (NAA)". The data are updated weekly from an OAQPS internal database. However, that does not necessarily mean the data have changed. This layer is drawn at all scales.
Definition Expression: N/A
Copyright Text: U.S. EPA Office of Air and Radiation (OAR) - Office of Air Quality Planning and Standards (OAQPS)