Treasure Valley water quality by city

Boise, Meridian, Nampa, Caldwell, and other Treasure Valley cities. Idaho DEQ results, hardness, and well estimates.

Public water systems in Ada, Canyon, Gem, Boise, and Elmore counties. Each county page lists systems, hardness where a Consumer Confidence Report has been reviewed, and ZIP well estimates. Households outside a listed system are on a private well. A well page is an estimate from nearby samples, not a test of that well.

Counties

• Ada County

  Boise City, Eagle, Garden City, Kuna, Meridian, Star
  54 systems
  504,229 people
  6.8 gpg hardness
• Canyon County

  Caldwell, Greenleaf, Middleton, Nampa, Notus, Parma, Star, Wilder
  83 systems
  203,284 people
  7.1 gpg hardness
• Gem County

  Emmett
  6 systems
  6,912 people
• Boise County

  Garden Valley, Horseshoe Bend, Idaho City, Robie Creek, Wilder
  20 systems
  4,257 people
• Elmore County

  Glenns Ferry, Mountain Home, Mountain Home AFB
  25 systems
  25,944 people
  9 gpg hardness