Use Boolean logic to narrow, broaden, or refine the search results.

• AND
  • Intersection
  • Search for two terms or phrases in the same document
  • Example:  stormwater AND bioswale

• OR
  • Inclusion
  • Search for either term or phrase separately as well as together
  • Example:  phosphorous-phosphate OR nitrogen-nitrate

• NOT
  • Exclusion
  • Remove the search term or phrase from the results
  • Example:  math union NOT labor

Video:  https://www.youtube.com/watch?v=bCAULDuMcso

• Phrase searching (using quotations around phrases or titles)
  • Examples: 
    • "stormwater quality conditions"
    • "drinking water"
    • "E. coli"
    • "Water Filtration Practices : Including Slow Sand Filters And Precoat Filtration"
• Truncation:  Search for variations in a word by using an asterisk
  • Examples:
    • filt*
      • filter
      • filtration
      • filters
      • filtering
      • filters
    • child*
      • child
      • children
• Parenthesis:  Grouping key search terms/phrases
  • Examples:
    • drinking water AND (law OR policy OR regulation)
    • water filt* AND (e. coli OR "escherichia coli")

Video:  https://www.youtube.com/watch?v=Ed7EswsnEbM

• drinking water AND membrane AND filt* AND (e. coli OR "escherichia coli")
• drinking water AND membrane AND filt* AND heavy metal
• water quality AND (law OR policy OR regulation)