This point feature layer represents the U.S.-Mexico border region sister cities. There are a total of 15 pairs of sister cities (31 total features) recognized in the U.S.-Mexico Border Program that span the entire length of the U.S.-Mexico border. These sister cities highlight the areas along the border that contain the most dense populations. Data was gathered by Jacoup Roiz from Google Maps GPS coordinates in 2019.

These data support the U.S.-Mexico Border Program Map, which highlights the projects funded through the U.S.-Mexico Border Program (2013-2020) in both Region 9 and Region 6 of the U.S. EPA, including U.S. Federally recognized Tribal communities and states of Texas, New Mexico, Chihuahua, Nuevo Leon, Tamaulipas, Coahuila, California, Baja California, Sonora, and Arizona within 62 miles (100 kilometers) of the U.S.-Mexico Border. The projects stem from the Border 2020 framework that has five goals to reduce air pollution, improve access to clean water, promote materials and waste management, improve emergency preparedness, and enhance environmental stewardship, and fundamental strategies that includes children's health and environmental education and outreach.

For more information about Border 2020 and/or current U.S.-Mexico Border program visit this website: https://www.epa.gov/usmexicoborder