Iydlewood Beach Park

Redmond, Washington
Managed by Puget Soundkeeper Alliance

Located on the shores of picturesque Lake Sammamish, Idylwood features a swimming beach, including a bathhouse and restrooms. Launch your car-top boat from the park’s small ramp. Spread out and play a game in the large open space or explore Idylwood’s playground area. Picnic shelters and picnic tables complete the picture for a perfect get-together. You will find plenty of parking here, as well.

WATER QUALITY
  • Passed water quality tests at least 95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . 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:   
CURRENT WEATHER
25°C
Clear and sunny
  • Report Pollution
MONITORING FREQUENCY

Iydlewood Beach Park is sampled weekly from May 12th 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 24 hours after the samples are collected.

During the sampling period, Puget Soundkeeper Alliance regularly updates the Swim Guide to reflect the most current information.

Local health officials follow the Ten State Standard –a geometric mean of 200 fecal coliforms with no single sample exceeding 1000 – to determine whether a swimming beach is polluted. The unit of measure is a CFU which stands for Colony Forming Units.

A beach is marked Green (open) when a single sample is below 1000 CFU/100ml and the geometric mean of the five most recent samples is below 200 CFU/100ml.

A beach is marked Red (closed) when either a single sample exceeds 1000 CFU/100ml or a geometric mean of the five most recent samples exceed 200 CFU/100ml

A beach is marked Grey when current water quality data is not available.

If a sample is found to exceed the Ten State Standard three new samples are collected. If the average of these samples confirms the results from the routine sample, Public Health Seattle & King County is alerted and determines the health and safety implications of the bacteria and algal toxin data collected and works with King County and the local park manager to post an advisory.

For more information go to King County Swimming Beach Bacteria Monitoring website: http://green2.kingcounty.gov/swimbeach/

WATER QUALITY GRAPH

Iydlewood Beach Park

Redmond, Washington
Managed by Puget Soundkeeper Alliance
WATER QUALITY
  • Passed water quality tests at least 95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on . 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:   
CURRENT WEATHER
25°C
Clear and sunny

Located on the shores of picturesque Lake Sammamish, Idylwood features a swimming beach, including a bathhouse and restrooms. Launch your car-top boat from the park’s small ramp. Spread out and play a game in the large open space or explore Idylwood’s playground area. Picnic shelters and picnic tables complete the picture for a perfect get-together. You will find plenty of parking here, as well.

  • Report Pollution
MONITORING FREQUENCY

Iydlewood Beach Park is sampled weekly from May 12th 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 24 hours after the samples are collected.

During the sampling period, Puget Soundkeeper Alliance regularly updates the Swim Guide to reflect the most current information.

Local health officials follow the Ten State Standard –a geometric mean of 200 fecal coliforms with no single sample exceeding 1000 – to determine whether a swimming beach is polluted. The unit of measure is a CFU which stands for Colony Forming Units.

A beach is marked Green (open) when a single sample is below 1000 CFU/100ml and the geometric mean of the five most recent samples is below 200 CFU/100ml.

A beach is marked Red (closed) when either a single sample exceeds 1000 CFU/100ml or a geometric mean of the five most recent samples exceed 200 CFU/100ml

A beach is marked Grey when current water quality data is not available.

If a sample is found to exceed the Ten State Standard three new samples are collected. If the average of these samples confirms the results from the routine sample, Public Health Seattle & King County is alerted and determines the health and safety implications of the bacteria and algal toxin data collected and works with King County and the local park manager to post an advisory.

For more information go to King County Swimming Beach Bacteria Monitoring website: http://green2.kingcounty.gov/swimbeach/

WATER QUALITY GRAPH



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