A list of sanitation deficiencies kept by the Indian Health Service has more than 1, 500 projects, including wells, septic systems, water storage tanks and pipelines.... Some projects would address water contamination from uranium or arsenic. About 3, 300 homes in more than 30 rural Alaska communities lack indoor plumbing, according to a 2020 report.... On the Navajo Nation, the largest Native American reservation, about one-third of the 175, 000 residents are without running water. Residents