Belfair State Park

Belfair, Washington

Belfair State Park is a 94-acre, year-round camping park on 3,720 feet of saltwater shoreline at the southern end of Hood Canal in western Washington.

Amenities/facilities include a campground, picnic area, 2 picnic shelters, a restroom and a walking trail

Water Quality
  • Met water quality standards less than 60% of the time

  • Historical Status
  • This status is based on the latest sample, taken on September 9th, 2022. Puget Soundkeeper Alliance updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on September 9th, 2022 at 8:47 PM.
For water quality icon legend, click:  
Monitoring Frequency

Belfair State Park is sampled weekly from May 31st to September 1st.

Source Information

The Washington Department of Ecology BEACH program tests water quality at salt water swimming beaches every week from Memorial Day to Labor Day for enterococcus bacteria. During the sampling period, Puget Soundkeeper regularly updates the Swim Guide to reflect the most current information. The saltwater swimming criteria are in two parts:

The geometric mean* should not exceed 30 enterococci/100 mL, based on results from a minimum of five weekly samples and a maximum of 12 weekly samples. The statistical threshold value* should not exceed 110 enterococci/100 mL, based on results from a minimum of five weekly samples and a maximum of 12 weekly samples. If either of these criteria is exceeded, a beach advisory should be issued at the beach.

To protect swimmers' health, BEACH also uses a Beach Action Value. If enterococcus levels exceed 104 enterococci/100 mL, a beach advisory is issued.

A beach is marked green if it meets all of the above criteria.
A beach is marked red if it exceeds any one of the above criteria.
A beach is marked grey if no current data is available.

Sample results are also shared on the Department of Ecology BEACH program website: https://fortress.wa.gov/ecy/coastalatlas/Tools/BeachClosure.aspx

More information about sampling protocols is available here: http://www.ecy.wa.gov/programs/eap/beach/program.html

* The geometric mean and statistical threshold value concentrations are based on the arithmetic average of the three samples collected at a single beach for the day

Read more
Water Quality Graph

Belfair State Park

Belfair, Washington

Water Quality
  • Met water quality standards less than 60% of the time
  • Historical Status
  • This status is based on the latest sample, taken on September 9th, 2022. Puget Soundkeeper Alliance updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on September 9th, 2022 at 8:47 PM.
For water quality icon legend, click:  

Belfair State Park is a 94-acre, year-round camping park on 3,720 feet of saltwater shoreline at the southern end of Hood Canal in western Washington.

Amenities/facilities include a campground, picnic area, 2 picnic shelters, a restroom and a walking trail

Monitoring Frequency

Belfair State Park is sampled weekly from May 31st to September 1st.

Source Information

The Washington Department of Ecology BEACH program tests water quality at salt water swimming beaches every week from Memorial Day to Labor Day for enterococcus bacteria. During the sampling period, Puget Soundkeeper regularly updates the Swim Guide to reflect the most current information. The saltwater swimming criteria are in two parts:

The geometric mean* should not exceed 30 enterococci/100 mL, based on results from a minimum of five weekly samples and a maximum of 12 weekly samples. The statistical threshold value* should not exceed 110 enterococci/100 mL, based on results from a minimum of five weekly samples and a maximum of 12 weekly samples. If either of these criteria is exceeded, a beach advisory should be issued at the beach.

To protect swimmers' health, BEACH also uses a Beach Action Value. If enterococcus levels exceed 104 enterococci/100 mL, a beach advisory is issued.

A beach is marked green if it meets all of the above criteria.
A beach is marked red if it exceeds any one of the above criteria.
A beach is marked grey if no current data is available.

Sample results are also shared on the Department of Ecology BEACH program website: https://fortress.wa.gov/ecy/coastalatlas/Tools/BeachClosure.aspx

More information about sampling protocols is available here: http://www.ecy.wa.gov/programs/eap/beach/program.html

* The geometric mean and statistical threshold value concentrations are based on the arithmetic average of the three samples collected at a single beach for the day

Read more
Water Quality Graph

  Beach Location Water Quality
Belfair, Washington
Gig Harbor, Washington
Shelton, Washington
Allyn, Washington
Swim Guide
is supported by
* The RBC Foundation

Swim Guide shares the best information we have at the moment you ask for it. Always obey signs at the beach or advisories from official government agencies. Stay alert and check for other swimming hazards such as dangerous currents and tides. Please report your pollution concerns so Affiliates can help keep other beach-goers safe.

Swim Guide, "Swim Drink Fish icons," and associated trademarks are owned by SWIM DRINK FISH CANADA. See Legal.

© SWIM DRINK FISH CANADA, 2011 - 2023