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Scenic Kitsap landscape: lake, houses, mountains.

Our vision: A safe and healthy Kitsap County for all.

Swimming Beach Monitoring

Water Pollution Identification & Correction

Oyster
Shellfish Safety
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Shellfish Harvesting Advisories
Person swimming
Swimming Beach Monitoring
Cyanobacteria in lake
Cyanobacteria
(Blue-Green Algae)
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Water Quality Advisories
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Water Quality
Reports

The Kitsap Public Health District's Water Pollution Identification & Correction (PIC) program protects public health and prevents fecal pollution in Kitsap County surface waters. 

Health District staff sample dozens of streams and swimming beaches across the county for fecal bacteria, an indicator of fecal pollution caused by human or animal waste. Fecal pollution can carry viruses and harmful bacteria that make people sick.

We use water sampling results to notify the public of potential health risks, and to find and fix fecal pollution problems. This helps keep our streams, swimming beaches and shellfish beds safe and healthy for the public to enjoy.

Read the 2024 Water Quality Monitoring Report

During the summer months, we monitor popular fresh and saltwater swimming areas for fecal bacteria. Fecal bacteria are a sign that there is pollution from human or animal poop in the water. This pollution can carry bacteria, viruses, and other germs that make people sick.  


From spring through fall, we also monitor freshwater beaches for toxic cyanobacteria (commonly known as toxic blue-green algae).

All swimming beach water contact advisories are posted on our water contact advisory page. If a swimming beach is not listed on the water contact advisory page, there is no current advisory for that beach.



IMPORTANT NOTE: Lake and marine swimming areas are natural waters. Conditions and water quality change frequently.

BE HEALTHY. STAY HEALTHY. Subscribe to our electronic notifications for water contact advisories and beach closures.

Sign Up to Get Advisories by Email or Text

Current Advisories

Active swimming beach, cyanobacteria (blue-green algae), and sewage spill advisories are listed below. Visit our swimming beach monitoring page to learn more and see a list of the beaches we monitor. For shellfish advisories, see our shellfish safety page

Cyanobacteria Warning

Location:

Kitsap Lake

Start Date:

August 8, 2025

Status:

Active

A cyanobacteria warning has been issued for Kitsap Lake. Avoid all contact with the water in Kitsap Lake due to potentially toxic cyanobacteria, also known as blue-green algae.


There are many different types of cyanobacteria and not all blooms are toxic. The cyanobacteria in Kitsap Lake are known to produce toxins.


Cyanobacteria (blue-green algae) are bacteria that occur naturally in water.


Because toxic cyanobacteria can make people sick, and can kill pets, fish, waterfowl and livestock, the public is advised to:

  • Avoid all contact with the lake water until further notice. This means no swimming, wading, or types of water play where water could be swallowed or get in the mouth, nose or eyes (especially in areas where blooms are concentrated).

  • Avoid ingesting lake or stream water. If a resident draws lake water for drinking purposes, they are encouraged to drink bottled water until further notice.

  • Limit access of pets and livestock to the lake.

  • Avoid eating fish caught during the algae bloom.

  • Rinse boats and trailers thoroughly before going to another lake.

Swimmer's Itch

Location:

All Lakes

Start Date:

Status:

Active

Swimmer's Itch (cercarial dermatitis) is caused by an allergic reaction to a parasite.


Swimmers should wear waterproof sunscreen and shower or vigorously towel-off immediately after swimming in a lake.

Read Full Advisory
  • This list displays water contact advisories that were removed (expired) in the current calendar year. These advisories are no longer in effect. Check the list above for active advisories.

    Long Lake

    Advisory:

    Swimming Beach Closure

    Start Date:

    August 20, 2025

    Date Removed:

    August 22, 2025

    Status:

    Removed

    Island Lake

    Advisory:

    Swimming Beach Closure

    Start Date:

    June 11, 2025

    Date Removed:

    June 13, 2025

    Status:

    Removed

    Portion of Liberty Bay/Keyport shoreline

    Advisory:

    Sewage Spill Advisory

    Start Date:

    April 30, 2025

    Date Removed:

    May 7, 2025

    Status:

    Removed

Marine (Saltwater) Swimming Beaches

Report Concerns


Bacteria from human and animal waste can make its way into swimming waters and make people sick. While some algae blooms are safe and occur in a lake's normal lifecycle, toxic algae can make humans and pets very sick—and can even be deadly.


If people or pets become sick after being in the water, or if you see an algae bloom or large numbers of dead fish, please report it to us online or by calling 360-728-2235 so we can investigate and, if necessary, warn others.


Resources



Stay Informed


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Water Quality Report

We monitor streams throughout Kitsap County to prevent water pollution and protect public health. View our yearly report to learn more about our work and the health of streams in your neighborhood.

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