Climate change and microbiological water quality at California beaches

  • Semenza J
  • Caplan J
  • Buescher G
 et al. 
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Abstract

Daily microbiological water quality and precipitation data spanning 6 years were collected from monitoring stations at southern California beaches. Daily precipitation projected for the twenty-first century was derived from downscaled CNRM CM3 global climate model. A time series model of Enterococcus concentrations that was driven by precipitation, matched the general trend of empirical water quality data; there was a positive association between precipitation and microbiological water contamination (P<0.001). Future projections of precipitation result in a decrease in predicted Enterococcus levels through the majority of the twenty-first century. Nevertheless, variability of storminess due to climate change calls for innovative adaptation and surveillance strategies.

Author-supplied keywords

  • Climate change
  • Enterococcus
  • Gastroenteritis
  • Precipitation
  • Recreational water use

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Authors

  • Jan C. Semenza

  • Joshua S. Caplan

  • Guido Buescher

  • Tapash Das

  • Mitchell V. Brinks

  • Alexander Gershunov

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