Detailed search for your lake

This database contains the most current toxicity data available. All instances of values above the recreational guidelines are kept as up to date as possible, but values below the guidelines may be somewhat delayed in entry.Since there is a lag time from the date of sample to the date of analysis, be sure to check the sample date when looking at data or before you use the lake. Remember to use caution and avoid scums. "When in doubt, stay out!"

Your local jurisdiction may have more specific information about your lake. Questions? Contact Lizbeth Seebacher at Department of Ecology.

If a lake is not listed, it has not been tested for toxic algae through the Ecology program.

The pins on the map represent the center of small lakes, regardless of where the sample was taken. To find more precise location information, download the toxin data and click the "view scum info" link. That is where specific sampling location information will be if it was provided. On larger lakes, (such as Lake Washington, Moses Lake and Potholes) pins represent the location of the sample if provided.

CountyWRIA NumberSiteLab Sample NumberCollect DateParameterToxin Conc. (µg/L)MDL (µg/L)Above State GuidelineAdditional Information
Whatcom1Wiser LakeL71083-210/01/2018Anatoxin-a<MDL0.010NoView
Whatcom1Wiser LakeL71083-210/01/2018Microcystin1.9000.150NoView
Whatcom1Wiser LakeL70549-207/17/2018Anatoxin-a0.0250.010NoView
Whatcom1Wiser LakeL70549-207/17/2018Microcystin19.4000.150YesView
Whatcom1Wiser LakeL66436-110/17/2016Anatoxin-a<MDL0.010NoNo
Whatcom1Wiser LakeL66436-110/17/2016Microcystin<MDL0.200NoNo
Whatcom1Wiser LakeL66125-109/06/2016Anatoxin-a<MDL0.010NoNo
Whatcom1Wiser LakeL66125-109/06/2016Microcystin165.0000.200YesNo
Whatcom1Wiser LakeL65901-408/03/2016Anatoxin-a0.0320.010NoView
Whatcom1Wiser LakeL65901-408/03/2016Microcystin19.8000.200YesView
Whatcom1Wiser LakeL63924-1410/05/2015Anatoxin-a0.0840.010NoView
Whatcom1Wiser LakeL63924-1410/05/2015Microcystin0.2160.160NoView
Whatcom1Wiser LakeL63878-209/28/2015Anatoxin-a0.0870.010NoNo
Whatcom1Wiser LakeL63878-209/28/2015Microcystin0.2550.160NoNo
Whatcom1Wiser LakeL63806-209/21/2015Anatoxin-a0.1200.010NoView
Whatcom1Wiser LakeL63806-209/21/2015Microcystin192.0000.160YesView
Whatcom1Wiser LakeL63763-309/14/2015Anatoxin-a2.3200.010YesView
Whatcom1Wiser LakeL63763-309/14/2015Microcystin325.0000.160YesView
Whatcom1Wiser LakeL63706-109/02/2015Anatoxin-a22.0000.010YesNo
Whatcom1Wiser LakeL63706-109/02/2015Microcystin48.6000.160YesNo
Whatcom1Wiser LakeL61034-108/22/2014Anatoxin-a<MDL0.010NoView
Whatcom1Wiser LakeL61034-108/22/2014Microcystin204.0000.160YesView

Get data

Export data

As of 6/26/2018 the format of the toxin and phytoplankton export has changed. A unique identification number has been added to each site.

Links to external sites do not constitute endorsements by King County. By visiting this and other King County web pages, you expressly agree to be bound by terms and conditions of the site. For questions on the content or functionality of the site please contact . For information or concerns about a current Algal Bloom please contact your local Health Department.

© 2019 King County