Nitrate, Arsenic and Selenium Concentrations in The Pecos Valley Aquifer, West Texas, USA

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This article discusses nitrate, arsenic, and selenium concentrations in the Pecos Valley Aquifer in west Texas in the context of local geology and land use.

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8 p.

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Hudak, Paul F. November 12, 2009.

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This article discusses nitrate, arsenic, and selenium concentrations in the Pecos Valley Aquifer in west Texas in the context of local geology and land use.

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8 p.

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Abstract: Nitrate, arsenic, and selenium concentrations in the Pecos Valley Aquifer of west Texas compiled, mapped, and analyzed in the context of local geology and land use. Alluvial deposits of sand, silt, clay, and gravel compose the unconfined aquifer. Ranching and farming are predominant land uses in the rural study area. Data were tabulated from 79 water wells with a median depth of 75 m and mapped with a geographic information system (GIS). The wells were sampled between the years 2003 and 2008. Total dissolved solids (TDS) concentrations in the aquifer were very high, with a median value of 2,687 mg/L. Approximately 18% of observations exceeded the 44.27 mg/L drinking water standard for nitrate, whereas 6% exceeded the 10 μg/L standard for selenium. There was a statistically significant, direct correlation between arsenic and selenium, as well as between nitrate and selenium concentrations. Moreover, arsenic and selenium concentrations were significantly higher in shallower wells. Probable sources of groundwater contamination in the study area include natural (geological) sources and agricultural activity.

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  • International Journal of Environmental Research, 4(2), University of Tehran. Graduate Faculty of Environment, November 12, 2009, pp. 1-8

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  • Publication Title: International Journal of Environmental Research
  • Volume: 4
  • Issue: 2
  • Edition: Spring
  • Page Start: 229
  • Page End: 236
  • Peer Reviewed: Yes

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  • November 12, 2009

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  • March 22, 2013, 6:09 p.m.

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  • Dec. 5, 2023, 9:53 a.m.

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Hudak, Paul F. Nitrate, Arsenic and Selenium Concentrations in The Pecos Valley Aquifer, West Texas, USA, article, November 12, 2009; [Tehran, Iran]. (https://digital.library.unt.edu/ark:/67531/metadc152432/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Arts and Sciences.

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