Colorado

Colorado drinking water quality

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

• Arvada (2024)
  20 contaminants measured
• Aurora (2024)
  18 contaminants measured
• Boulder (2024)
  10 contaminants measured
• Centennial (2023)
  30 contaminants measured· 8 at or above the limit
• Colorado Springs (2024)
  16 contaminants measured
• Denver (2023)
  16 contaminants measured· 5 at or above the limit
• Lakewood (2024)
  33 contaminants measured· 7 at or above the limit
• Pueblo (2023)
  15 contaminants measured· 2 at or above the limit
• Thornton (2024)
  19 contaminants measured· 2 at or above the limit
• Westminster (2024)
  7 contaminants measured