Water Quality/Hardness 

The Cottage Grove Utility Department is continuously maintaining and upgrading the infrastructure required to bring the residents and businesses of the city a safe and abundant supply of water.

Water Quality/Hardness (milligrams per liter or parts per million):

  • Chlorine: 0.4 mg/L
  • Fluoride: 1.1 mg/L
  • Alkalinity: 236 mg/L
  • pH: 7.6
  • Hardness: 298 mg/L (17 grains per gallon)

Water Quality Reports