The NADB is authorized to serve communities in the U.S.-Mexico border region, which extends 2,100 miles from the Gulf of Mexico to the Pacific Ocean. Eligible communities must be located within 100 kilometers (about 62 miles) north of the international boundary in the four U.S. states of Texas, New Mexico, Arizona and California and within 300 kilometers (about 186 miles) south of the border in the six Mexican states of Tamaulipas, Nuevo Leon, Coahuila, Chihuahua, Sonora, and Baja California.

NADB-BECC Border Map