Washington Water Quality Facts and Drinking Water Problems

Updated: February 6, 2025
Published: July 2, 2020
Close up of water falling on transparent water surface

Before water reaches your tap, it is sourced from a complex system of surface water and groundwater from around Washington that includes lakes, rivers, streams, reservoirs, wells, and more. After water is pumped from these sources, it is purified, cleaned, and tested at a water treatment plant before being distributed throughout the state.

While the quality of Washington’s water varies significantly depending on the region, residents of The Evergreen State often report their water being hard, which contributes to cloudy dishes and glassware, limescale or white scale buildup, and soap scum residue in bathroom areas.

Different parts of Washington can have very different water challenges as the quality of water across the state can greatly vary. Learn more about the water where you live:

Your local Washington Culligan Water Expert is an expert on your water, can test it to determine any problems, and provide the best way to address them.

Find out more about your local water

Resources for homeowners in Yakima

Schedule your free water consultation

Our Culligan water experts are ready to help you find the right solution for your water, starting with your free in-home water test and consultation.

Enter your information

Fields marked * are required fields.

By opting in, you are agreeing to receive SMS messages from Culligan. Alerts at the phone number listed above. 4 msgs/month. If you have questions, text HELP to 73777 or contact Customer Service at 1-855-558-1684 or customerservice@culligan.com. You can opt-out of the subscription anytime by texting STOP to 73777. Msg&data rates may apply. You can view the Terms and Conditions here and Privacy Policy here.