Impact of Fluoride Concentrations on Natural Waters throughout Texas Mark Stehouwer GIS in Water Resources Fall 2013.

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Presentation transcript:

Impact of Fluoride Concentrations on Natural Waters throughout Texas Mark Stehouwer GIS in Water Resources Fall 2013

Agenda: 1.Context and fluoride in water 2.Impacted regions/mapping 3.Connections with geography and hydrology 4. Project conclusions 2 “To generate a visual medium by which fluoride contamination of water sources in the state of Texas along with the impacted populations and geographic regions can better be understood” Project Goal:

Fluoride in Water Debunking controversy and conspiracy EPA Limit [F] = 4 mg/L Benefits [F] < 1.5 mg/L - Tooth Development - Cavity Prevention Health Risks [F] > 2 mg/L - Pitting of teeth - Dental and/or skeletal fluorosis 3 McGrady et al. BioMed Oral Health, 2012.Whyte et al. Amer. Jour. Med, FluorideActionNetwork, CPHA

Mapping Fluoride through GIS 4 Basemaps Thematic Maps Fluoride Data Mapping and Processing

5 Fluoride in Surface Waters

6

7 Fluoride Regions for Surface and Ground Waters

8 Hydrology Results Regional ground water fluoride contours and major aquifer overlay Regional surface water fluoride contours and major basin overlay

9 US Census Data County Level Population Density and Impacted Regions [F] > 2mg/L SW Fluoride > 2mg/L GW Fluoride > 2mg/L

10 Project Extensions and Conclusions Northwest Texas has highest potential for fluoride contamination Station and fluoride data limitations GIS provides framework for visualizing and identifying contaminant presence in natural environment To do… Find % Texas Population impacted by high fluoride

11 Questions