What are the problems with the current method used for issuing beach advisories (based on the previous day’s E. coli level)?
Current methods to assess concentrations of E. coli using membrane filtration or other cultural methods take at least 18 hours to complete. During this period, E. coli levels may increase or decrease substantially. A heavy rainfall may cause an increase in E. coli levels overnight. Alternatively, a bright sunny day may cause E. coli levels to fall. So, the beach may be erroneously posted based on measured E. coli levels from the previous day.
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- What are the problems with the current method used for issuing beach advisories (based on the previous day’s E. coli level)?
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