The Air Quality Standards Implementation Act of 2024 modifies how states implement federal air quality standards under the Clean Air Act. The bill extends the review period for national air quality standards from five years to ten years, allows the EPA to consider how feasible standards are to achieve when setting them, and expands state representation on the EPA's scientific advisory committee from one to three members representing different geographic regions. The legislation requires the EPA to publish implementation guidance alongside new air quality standards and gives states at least one year to fix deficiencies before the EPA imposes federal implementation plans. For areas struggling to meet ozone and particulate matter standards, the bill provides relief from federal penalties if states can demonstrate the pollution comes from outside sources, natural events, or mobile sources beyond state control, though states must renew such demonstrations every five years. The bill also establishes new processes for addressing wildfire-related emissions and requires the EPA to study ozone formation and report to Congress within two years on how foreign pollution affects U.S. air quality designations.
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