The City of Fairfield reports annually to the community in its  on the content of the drinking water produced at its water treatment plant during the prior year. This is an extensive report on the level of chemicals found in the drinking water and whether or not the chemical amounts exceeded acceptable ranges set by the Environmental Protection Agency (EPA).

Daily Averages

Listed below are some of the daily averages of different analyses during 2022:

• pH - 8.7 standard unit (s.u.)
• Alkalinity - 56 milligrams per liter
• Chlorine - 1.27 milligrams per liter
• Hardness - 130 milligrams per liter or 7.6 grains per gallon (gpg)
• Fluoride - 1.0 milligrams per liter