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Open AccessArticle

Quantification of Elemental Contaminants in Unregulated Water across Western Navajo Nation

1
College of Medicine Clinical Translational Science Graduate Program, University of Arizona, Tucson, AZ 85721, USA
2
Department of Chemistry & Biochemistry, Northern Arizona University, P.O. Box 5698, Flagstaff, AZ 86011, USA
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(15), 2727; https://doi.org/10.3390/ijerph16152727
Received: 11 June 2019 / Revised: 26 July 2019 / Accepted: 27 July 2019 / Published: 31 July 2019
(This article belongs to the Section Environmental Science and Engineering)
The geologic profile of the western United States lends itself to naturally elevated levels of arsenic and uranium in groundwater and can be exacerbated by mining enterprises. The Navajo Nation, located in the American Southwest, is the largest contiguous Native American Nation and has over a 100-year legacy of hard rock mining. This study has two objectives, quantify the arsenic and uranium concentrations in water systems in the Arizona and Utah side of the Navajo Nation compared to the New Mexico side and to determine if there are other elements of concern. Between 2014 and 2017, 294 water samples were collected across the Arizona and Utah side of the Navajo Nation and analyzed for 21 elements. Of these, 14 elements had at least one instance of a concentration greater than a national regulatory limit, and six of these (V, Ca, As, Mn, Li, and U) had the highest incidence of exceedances and were of concern to various communities on the Navajo Nation. Our findings are similar to other studies conducted in Arizona and on the Navajo Nation and demonstrate that other elements may be a concern for public health beyond arsenic and uranium. View Full-Text
Keywords: unregulated water; Navajo; arsenic; uranium; manganese unregulated water; Navajo; arsenic; uranium; manganese
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MDPI and ACS Style

Credo, J.; Torkelson, J.; Rock, T.; Ingram, J.C. Quantification of Elemental Contaminants in Unregulated Water across Western Navajo Nation. Int. J. Environ. Res. Public Health 2019, 16, 2727. https://doi.org/10.3390/ijerph16152727

AMA Style

Credo J, Torkelson J, Rock T, Ingram JC. Quantification of Elemental Contaminants in Unregulated Water across Western Navajo Nation. International Journal of Environmental Research and Public Health. 2019; 16(15):2727. https://doi.org/10.3390/ijerph16152727

Chicago/Turabian Style

Credo, Jonathan; Torkelson, Jaclyn; Rock, Tommy; Ingram, Jani C. 2019. "Quantification of Elemental Contaminants in Unregulated Water across Western Navajo Nation" Int. J. Environ. Res. Public Health 16, no. 15: 2727. https://doi.org/10.3390/ijerph16152727

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