![]() The Navajo Nation and Hopi Tribe have been concerned about the effects of pumping on long-term water supply, discharge in streams and springs, and quality of groundwater. The aquifer consists of three rock formations-the Navajo Sandstone, Kayenta Formation, and Wingate Sandstone, which are hydraulically connected and function as a single aquifer. The N aquifer is the major source of water for industrial and municipal users in the 5,400 square-mile Black Mesa area of northeastern Arizona. In addition, the springs and streams fed by groundwater discharge are an important part of their culture. The Navajo Nation and Hopi Tribe live in the Black Mesa area, and they depend on groundwater from the N aquifer to meet municipal, domestic, livestock, and irrigation needs.
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