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. 2018 May 7;15(5):932. doi: 10.3390/ijerph15050932

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Categorization of Pueblo, Colorado based on topsoil sampling conducted during the current study in 2013 and re-constructed prediction map from previously reported topsoil lead levels [4]. All the data points in the figure represent the 31 actual topsoil sampling sites during the current study in the summer of 2013; these data are not based on previous studies or prediction maps. The city was categorized in three zones, based on predicted topsoil lead levels: Zone 1 with soil lead levels >200 mg/kg, Zone 2 with soil lead levels between 100–199 mg/kg and Zone 3 with soil lead levels <100 mg/kg. The main smelter, the Colorado Smelter, was located in Zone 1 and the other smelters were located in Zone 2.