Deerfield Water Company

The following pages contain important information about Organic Carbon removal. Each month, the percentage of Total Organic Carbon (TOC) removal is measured, and the system has met all TOC removal requirements unless otherwise noted in the violations section.

Turbidity (NTU) measures water cloudiness and serves as an excellent indicator of water quality and filtration effectiveness. Sodium monitoring provides information for consumers and health professionals concerned about sodium intake due to dietary restrictions. There is no State or Federal maximum contaminant level (MCL) for sodium. Those on sodium-restricted diets should consult healthcare providers about sodium levels in their water.

Lead & Copper - The Village maintains compliance with regulations for lead and copper control. Unregulated Contaminants are monitored to help the EPA determine their prevalence in tap water and whether future regulation is warranted, though MCLs haven't been established by state or federal agencies.

Beyond mandated testing, Deerfield continuously monitors your water through automated control systems and weekly physical sampling. These samples are analyzed by the Central Lake County Joint Action Water Agency, an EPA-certified laboratory, ensuring rapid response to any potential issues.

Water sources (both tap and bottled) include rivers, lakes, streams, ponds, reservoirs, springs and wells. As water travels over land or through the ground, it dissolves naturally occurring minerals and radioactive material while also collecting substances from animal presence or human activity. Potential contaminants include microbial pollutants (viruses, bacteria), inorganic contaminants (salts, metals), pesticides and herbicides, organic chemicals, and radioactive contaminants.

EPA regulations limit contaminant levels in public water systems, while FDA regulations establish similar protections for bottled water. The Village of Deerfield and City of Highland Park routinely monitor for contaminants in accordance with federal and state requirements.

1. Where does Deerfield water come from?
   Deerfield supplies purchased surface water to Deerfield, Illinois.
2. Does Deerfield test its tap water?
   Yes. Like every public water system, Deerfield must test its water under the federal Safe Drinking Water Act and publish an annual water quality report (Consumer Confidence Report). Ask the utility for the latest report or look for it on its website.
3. How do I contact Deerfield?
   Call 847-317-7245 or visit 465 Elm Street, Deerfield, IL 60015, or use the contact options on the utility’s website.
4. Does Deerfield water contain lead?
   Water usually leaves the treatment plant without lead. Lead can enter tap water from older service lines, solder and brass fixtures inside homes, especially when water sits in the pipes. Run the tap before drinking if water has been sitting, and ask the utility about lead testing and service line records.
5. Is Deerfield water hard?
   Hardness depends on the source and changes over time. The annual water quality report lists hardness, or you can test it at home. If it is above about 7 grains per gallon, a water softener sized to your measured hardness will stop scale and spotting.