Walla Walla Water Division Water Company

Why might contaminants appear in my tap water? Both tap and bottled water typically contain at least trace amounts of various contaminants. As water flows over land surfaces or through underground soil layers, it naturally collects minerals and organic materials.

The presence of these substances doesn't always indicate a health risk. For comprehensive information about contaminants and potential health impacts, residents can contact the Environmental Protection Agency's (EPA) Safe Drinking Water Hotline at 800-426-4791 or visit http://www.Epa.Gov/safewater.

Where does Walla Walla's water originate? The City utilizes a blend of surface and groundwater sources. In 2017, approximately 88% came from surface water sourced from the protected Mill Creek Watershed - an uninhabited, pristine 36-square-mile region straddling the Washington-Oregon border in the Blue Mountains. The remaining supply comes from deep wells positioned throughout the City.

How is our water treated? Walla Walla employs a dual disinfection system combining ozone and chlorine treatments to eliminate harmful bacteria and microorganisms. This disinfection approach represents one of the most significant public health advancements of the 20th century.

Should certain individuals take extra precautions? Some residents may be more vulnerable to water contaminants than others. Those with compromised immune systems - including cancer patients undergoing chemotherapy, organ transplant recipients, people with HIV/AIDS, some elderly individuals, and infants - may face higher risks from infections. These residents should seek advice from healthcare providers regarding their drinking water. EPA/CDC guidelines on reducing infection risks are available via the Safe Drinking Water Hotline (800-426-4791).

1. Where does Walla Walla Water Division water come from?
   Walla Walla Water Division supplies surface water to Walla Walla, Washington.
2. Does Walla Walla Water Division test its tap water?
   Yes. Like every public water system, Walla Walla Water Division 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 Walla Walla Water Division?
   Call 509-527-4380 or visit 55 E. Moore Street, Walla Walla, WA 99362, or use the contact options on the utility’s website.
4. Does Walla Walla Water Division 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 Walla Walla Water Division 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.