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  • Test Your Water Quality

    Make sure your water is safe—test it.

    Water quality testing help ensure water is safe for people to drink. Whether you have your own well or manage a small or large water system, regular testing can alert you to potential problems. If your water supply becomes contaminated, people can get very sick. One of the most important steps is to test regularly for coliform bacteria.

    What contributes to bacteria in drinking water?

    • Failing septic systems.
    • Open holes on your well.
    • Broken water line.
    • Unmaintained water equipment.
    • Large amounts of manure or livestock near your well.
    • Poor sampling location.

    Know what’s in the water.

    Common chemicals like arsenic, lead, iron, copper and manganese may affect water quality in wells and can cause:

    • Water discoloration.
    • Fixture stains.
    • Weird smells.
    • Health issues.

    Learn more about:

    When to test your water system or well?

    Group B water systems test for:

    • Bacteria once a year.
    • Nitrates once every 3 years.

    Individual well owners should follow the same testing schedule.

    Larger (Group A) water systems test more often. Contact your water system manager for more details.

    How to test your drinking water?

    You have options:

    • Use a private lab.
    • Hire a water professional.
    • Have us do it.
    • Do it yourself.

    Learn where and how to take a sample.

    Water sample pick-up and lab locations.

    Pick up sample bottles and drop off your test at these locations.


    Washington State Department of Health’s active drinking water alerts.

    Unsatisfactory results

    We’re here to help.

    Don’t just put bleach down your well. Try to find the reason for the failure first. Check your system. Make any necessary repairs. If you still can’t resolve the problem, use our shock chlorination instructions:


    Contact us at or (253) 649-1420, press 2.