Study probes link between uranium and kidney illness By Zsombor Peter CHURCHROCK Roger Lewis and his family have watered their animals at the same well since the 1950s. An old uranium mine still pulsing with radiation, 25 years after shutting down, sits a few miles off. When two of his relatives started getting sick, he didnt give the mine much thought. But when Lewis saw the yellow triangle next to it on a list of local wells at the chapter house Wednesday evening, a sign that its waters had potentially dangerous levels of heavy metals for livestock, he began to wonder. It makes you think, he said. Is this related
to that? According to the University of New Mexicos Dr. Johnnye Lewis, the studys principal investigator, and no relation to Roger Lewis, they were finding a link. She quickly advised the audience not to make too much of the news. The findings are preliminary. Four more years of studies still lay ahead. But the news was telling nonetheless. The fact that were seeing a relationship at all at
this stage ... means that its unlikely to go away, she
said. You cant get by very long without kidneys, Lewis
said. Although others have studied the links between uranium exposure and kidney disease, this project breaks new ground. Lewis said the medical literature is filled with some 150 studies on the subject from across the world, with findings that run the gamut. But all of them, she added, deliberately exclude people with diabetes. It makes sense. The researchers wanted an unencumbered look at what uranium, and uranium alone, can do to the kidneys. But Lewis and her group are interested in what uranium-contaminated drinking water can do to a population like the Navajo that already suffers from a high rate of kidney disease. Other studies have looked into the effects of various heavy metals on the kidneys of diabetics, but never uranium. Lewis and her group believe the wells are key. Although its the Navajo Nations policy that the wells be used for watering stock only, she said, the groups surveys indicate that residents drink from them anyway. And theres not one well in the area, they found, that at least someone isnt drinking from. But because the wells arent intended for drinking, no ones been keeping a close eye on whats in them. Theyre not considered to be public water supplies ... so theyre not regularly monitored and theyre not maintained on a regular basis, Lewis said . They were surprised to find that most of the 350 people theyve surveyed so far are hooked up to regulated water supplies. But most of them also chose to drink from the wells anyway. According to the survey, most people have more faith in the quality of the well water than in the water coming out of their taps. But as the researchers are finding, that may not always be the case. Of the wells theyve tested so far, theyve found levels of uranium and arsenic above or near the federal governments maximum contamination levels for drinking water in four wells, and of lead, mercury and radium in two. As with everything else, its their choice to use them or not, said Bess Seschillie, project coordinator for the Dine Network for Environmental Health, a creation of the Eastern Navajo Health Board. Without the authority to shut the wells down, she said, all we can do is educate the people. Eventually, the group hopes to survey 1,300 people in the Church Rock and Baca-Prewitt Chapters, and take blood and urine samples from 450. By then, it hopes to have a model it can use to predict the areas around old uranium mines where people face the highest risk of kidney disease, across the Eastern Agency, the Navajo Nation, and even other tribes. So we really see this as important for understanding uranium contamination and environmental risk ... on a much wider scale, said Lewis. There is some evidence that if you detect (kidney) disease early enough and you limit the exposure, she said, then you can reverse it. If communities know the risks they face, they may have that chance. Its not just about us, Seschillie said. Its about our future and our kids, and we want them to continue to live out here. Roger Lewis herds more than 50 head of cattle, horses and sheep across this land. He hopes his children and grandchildren will be able to do the same. |
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