WARN was fundamental in stopping the uranium mining that was going to occur on the sacred Black Hills of South Dakota. They created coalitions in order to stop the mining on lands that are sacred to the Lakota, Nakota, and Dakota people. In 1980 WARN conducted and published a study on the effects of radiation contamination in water from uranium mining on human reproductive health titled "Radiation: Dangerous to Pine Ridge Women" in the journal
Akwesane News. J. Haworth Jonte was the biochemist that measured radiation levels within the
Pine Ridge Indian Reservation water sources. The federal guidelines indicated that any measurement over 5 picocuries of radiation per liter of water was a severe health hazard. The surface water measurement was 15 picocuries per liter. The reservation's aquifer had a measurement of 11 picocuries per liter, meaning that the groundwater system was highly radioactive. A new well was proposed to solve water contamination issue. The study also tested water at the site of the new well and found that water to be fourteen times higher than the federal guidelines. WARN conducted a community survey in the Pine Ridge Indian Reservation in South Dakota, close to the border of Nebraska. The survey found an abnormally high rate of miscarriages, leukemia, and cancer mortality in the population of the reservation and surrounding areas. Other adverse health effects were also found in the area: 60 to 70 percent of children who were born in the Pine Ridge Hospital suffered respiratory problems as a result of underdeveloped lungs or jaundice. Thirty-eight percent of pregnant women admitted to the Public Service Hospital had miscarriages and many of these women experienced excessive bleeding after miscarrying. Cattle living on the reservation also saw an increase in birth defects. These negative health effects were linked to the effects of radiation from uranium mining. The radiation from mining in the Black Hills in South Dakota and Edgemont contaminated the
Cheyenne River, a source for the Lakota Aquifer. WARN called for a complete Congressional investigation of the health and water situation in the Pine Ridge Reservation. ==Sterilization of Native American women==