NTUA supplies and extends electricity, water, natural gas, wastewater treatment, and solar power services to homes and businesses throughout the 26,000 square mile Navajo Nation and neighboring communities. NTUA purchases electrical power from off the Navajo Nation and transmits that power to homes throughout northern Arizona, northwestern New Mexico, and southeastern Utah. Even as NTUA works hard to meet the basic utility needs of the Navajo Nation an estimated 18,000 families are without access to electricity, and many more homes and families are without access to basic infrastructure, such as water, wastewater, and natural gas services. As a non-profit enterprise, NTUA receives federal loans and grants to extend electrical power to rural communities. What money NTUA generates is returned to maintain, operate, and upgrade utility infrastructure.