Wisconsin

Wisconsin drinking water quality

Every public water system in Wisconsin we've verified. Each report covers one calendar year and shows the utility's own measured contaminant levels against federal limits.

• Brown Deer (2024)
  56 contaminants measured
• Butler (2024)
  56 contaminants measured
• Franklin (2024)
  56 contaminants measured
• Green Bay (2024)
  31 contaminants measured· 2 at or above the limit
• Greendale (2024)
  56 contaminants measured
• Greenfield (2024)
  56 contaminants measured
• Hales Corners (2024)
  56 contaminants measured
• Madison (2024)
  27 contaminants measured· 1 at or above the limit
• Menomonee Falls (2024)
  56 contaminants measured
• Mequon (2024)
  56 contaminants measured
• Milwaukee (2024)
  56 contaminants measured
• New Berlin (2024)
  56 contaminants measured
• Shorewood (2024)
  56 contaminants measured
• St. Francis (2024)
  56 contaminants measured
• Thiensville (2024)
  56 contaminants measured
• Waukesha (2024)
  56 contaminants measured
• Wauwatosa (2024)
  56 contaminants measured
• West Allis (2024)
  56 contaminants measured