Our website is changing! Starting March 31, 2023 our website will look different, but we're working hard to make sure you can still find what you need.  
King County logo
  1. Swimming beach data
  2. Archived Data

Archived Data

The following map and list indicates the historical swimming beach sampling stations in King County. To view past bacteria data, select a beach from the list or click on the map. Units of fecal coliform data are cfu/100mL. To view current data, view our current data pages.

Andrews Bay - Seward Park
Angle Lake Beach
Beaver Lake Beach
East Gene Coulon
East Juanita Beach
Echo Lake
Enatai Beach
Fivemile Lake
Gene Coulon
Green Lake Duck Island Launch
Green Lake- East
Green Lake- West
Groveland Park Beach
Hidden Lake
Houghton Beach
Idylwood Beach
Idylwood Creek
John's Creek
Juanita Beach
Juanita Creek
Kennydale Beach
Lake Boren
Lake Sammamish State Park
Lake Wilderness Beach
Logboom Park
Luther Burbank Beach
Madison Park Beach
Madrona Beach
Magnuson Beach
Magnuson Beach Off Leash Area
Marina Park Beach
Matthews Beach
Medina Beach
Meydenbauer Bay Beach
Mount Baker Beach
NE 130th Pl
Newcastle Beach
North Luther Burbank Beach
North Matthews Beach
OO Denny Beach
Pine Lake
Pritchard Island Beach
Rattlesnake Lake
Sammamish Landing Beach
South Luther Burbank Beach
South Matthews Beach
Thornton Creek
Waverly Park Beach
West Gene Coulon
West Juanita Beach
Yarrow Bay
Click a point on this Map to view data for an individual beach, or follow one of the links in the list of beaches.
Map icon for beach  Beach   Map icon for stream  Stream