Does the District add anything to my water?
The District currently chlorinates the groundwater for disinfection purposes and to resolve taste and odor issues. State and federal law requires surface water sources, including the water received by Sammamish Plateau Water from the regional system to be disinfected, and chlorine is added to the surface water supply. Fluoride is added to match levels found in the regional water supply to promote dental health.

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1. Where does the District get its water supply?
2. Does the District add anything to my water?
3. Is the District's water hard or soft?
4. How often is my water tested?
5. How can I learn more about my drinking water quality?