The Environmental Protection Agency (EPA) is taking direct final action to approve a state implementation plan (SIP) revision submitted by the State of Nevada ("State"). On April 3, 2012, the State of Nevada submitted to the EPA a second 10-year limited maintenance plan (LMP) for the Lake Tahoe Nevada Area ("Area") for the carbon monoxide (CO) national ambient air quality standards (NAAQS or "standards"). This LMP addresses maintenance of the CO NAAQS for a second 10-year period beyond the original 10-year maintenance period. On August 26, 2016, the State amended the 2012 submittal with a supplemental SIP submittal ("2016 supplement" or "supplement"). The EPA is also approving the 2011 emissions inventory, the 2024 projected emissions inventory and the revised alternative monitoring strategy included with the 2016 supplement. We are taking these actions under the Clean Air Act (CAA or "Act").