The EPA Office of Transportation and Air Quality (OTAQ) is issuing this NOFO to announce the availability of funds and solicit applications from eligible entities to help ports nationwide transition to zero-emission (ZE) operations under the EPA’s Clean Ports Program. The EPA’s Clean Ports Program will fund ZE port equipment and infrastructure to reduce mobile source emissions (criteria pollutants, air toxics, and/or greenhouse gases) at United States ports, delivering cleaner air for communities across the country. The Clean Ports Program will also fund climate and air quality planning activities as part of a separate NOFO – including emissions inventories, strategy analysis, community engagement, and resiliency measure identification – that will build the capacity of port stakeholders to continue to reduce pollution and transition to ZE operations over time.