Groverland Beach

Mercer Island, Washington

Groveland Beach is located at SE 58th Street and 80th Ave SE.

Lifeguards: Groveland Beach will not have lifeguards during Summer 2016. Visit Luther Burbank beach for guarded swimming.

Amenities include:

Swimming
Picnicking
Barbeque area
Playground area for children
Restrooms (available during summer season only)

Pets are not allowed at public swim areas from May 1 to September 30. Outside of these times dogs are allowed on the beach but must be on a leash at all times

WATER QUALITY
  • Meets water quality standards
  • Current Status
  • This status is based on the latest sample, taken on June 17th, 2019. Puget Soundkeeper Alliance updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
MONITORING FREQUENCY

Groverland Beach is sampled weekly from May 1st to September 1st

SOURCE INFORMATION

The King County Department of Natural Resources and Parks monitors water quality at designated swimming beaches in the county from May to September. Water quality data is collected weekly, usually on Mondays. Results are generally posted to the King County Swimming Beach Bacteria Monitoring page by noon on Wednesday.

During the sampling period, Puget Soundkeeper Alliance regularly updates the Swim Guide to reflect the most current information. Local health officials use the following protocol to make closure determinations – A day’s average E. coli value is over 1000 CFU/100 mL – OR - The average of the E. coli values for the three most recent sampling days is over 200 CFU/100 mL. The three-day average is calculated using the geometric mean (geomean). The unit of measure is a CFU which stands for Colony Forming Units.

A beach is marked Green (open) when both of these protocols are met.
A beach is marked Red (closed) when these criteria are not met and the public health officials have closed the beach.

A beach may also be marked Red if there is a Harmful Algal Bloom (HAB) reported at the beach. A beach is marked Grey when current water quality data is not available. The King County Water and Land Resources Division (WLRD) collects and analyzes the samples. Public Health Seattle & King County is alerted when bacteria or state algal toxin thresholds are exceeded and determines the health and safety implications of the bacteria and algal toxin data collected, and they work with King County WLRD and the local park manager to post an advisory.

For more information go to King County Swimming Beach Bacteria Monitoring website: kingcounty.gov/swimbeach.

WATER QUALITY GRAPH

Groverland Beach

Mercer Island, Washington

WATER QUALITY
  • Meets water quality standards
  • Current Status
  • This status is based on the latest sample, taken on June 17th, 2019. Puget Soundkeeper Alliance updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   

Groveland Beach is located at SE 58th Street and 80th Ave SE.

Lifeguards: Groveland Beach will not have lifeguards during Summer 2016. Visit Luther Burbank beach for guarded swimming.

Amenities include:

Swimming
Picnicking
Barbeque area
Playground area for children
Restrooms (available during summer season only)

Pets are not allowed at public swim areas from May 1 to September 30. Outside of these times dogs are allowed on the beach but must be on a leash at all times

MONITORING FREQUENCY

Groverland Beach is sampled weekly from May 1st to September 1st

SOURCE INFORMATION

The King County Department of Natural Resources and Parks monitors water quality at designated swimming beaches in the county from May to September. Water quality data is collected weekly, usually on Mondays. Results are generally posted to the King County Swimming Beach Bacteria Monitoring page by noon on Wednesday.

During the sampling period, Puget Soundkeeper Alliance regularly updates the Swim Guide to reflect the most current information. Local health officials use the following protocol to make closure determinations – A day’s average E. coli value is over 1000 CFU/100 mL – OR - The average of the E. coli values for the three most recent sampling days is over 200 CFU/100 mL. The three-day average is calculated using the geometric mean (geomean). The unit of measure is a CFU which stands for Colony Forming Units.

A beach is marked Green (open) when both of these protocols are met.
A beach is marked Red (closed) when these criteria are not met and the public health officials have closed the beach.

A beach may also be marked Red if there is a Harmful Algal Bloom (HAB) reported at the beach. A beach is marked Grey when current water quality data is not available. The King County Water and Land Resources Division (WLRD) collects and analyzes the samples. Public Health Seattle & King County is alerted when bacteria or state algal toxin thresholds are exceeded and determines the health and safety implications of the bacteria and algal toxin data collected, and they work with King County WLRD and the local park manager to post an advisory.

For more information go to King County Swimming Beach Bacteria Monitoring website: kingcounty.gov/swimbeach.

WATER QUALITY GRAPH



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