Environmentalists threaten suit to compel EPA action on L.A. SIP rules

Three environmental groups are threatening to sue EPA under the Clean Air Act to compel the agency to act on proposed California state implementation plan (SIP) “contingency measures” for the greater Los Angeles region to attain federal ozone standards that were submitted at the end of 2019. “To date, EPA has taken no action on this plan. While this plan has been pending at EPA, the South Coast Air Basin has had one of the worst ozone seasons in close...