Woodinville Water District

To ensure tap water safety, the Environmental Protection Agency and Washington State Board of Health establish regulations limiting contaminant levels in public water systems. Similarly, FDA and Washington State Department of Agriculture set standards for bottled water to provide equivalent public health protection.

Washington's Source Water Assessment Program is managed by the Department of Health (DOH) Office of Drinking Water. According to DOH guidelines, all surface waters in Washington receive a "high" susceptibility rating, regardless of whether contaminants have been detected or if potential contamination sources exist in the watershed. Source water assessment information is available at https://fortress.wa.gov/doh/eh/dw/swap/maps/

All water sources, including bottled water, can reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants doesn't necessarily indicate a health risk. For more information about contaminants and potential health effects, contact the EPA's Safe Drinking Water Hotline (800-426-4791).

In Seattle's regional water supplies, potential contamination sources include:

• Microbial contaminants such as viruses, bacteria, and protozoa from wildlife
• Inorganic contaminants, including naturally occurring salts and metals
• Organic contaminants resulting from chlorine interacting with naturally present organic matter

1. How often is Woodinville's water tested?
2. What should I do if I notice unusual taste or odor in my tap water?
3. How can I reduce exposure to potential contaminants in my home water?
4. Does Woodinville Water District use chlorine or chloramine for disinfection?
5. Are there special considerations for immunocompromised residents?