SIP Approval: Nevada (nonattainment new source review requirements for the 2015 ozone NAAQS for Clark County Department of Environment and Sustainability). 

EPA withdrew from Agency regulation and management two designated ocean dredged material disposal sites, the Nome East and Nome West Sites, located near Nome, Alaska, pursuant to the Marine Protection, Research, and Sanctuaries Act.

EPA made an interim final determination that the California Air Resources Board has submitted a revised rule and has also submitted revised rules on behalf of the San Joaquin Valley Unified Air Pollution Control District, Ventura County Air Pollution Control District, and South Coast Air Quality Management District that correct deficiencies in its CAA SIP provisions concerning ozone nonattainment requirements for controlling volatile organic compounds at crude oil and natural gas facilities.