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 NumberSiteCollect DateParameterToxin Conc. (µg/L)MDL (µg/L)Above State GuidelineAdditional InformationSample LocationEcology Tracking Number
Franklin36Sagemoor Pond10/23/2023Microcystin9.6400.150YesViewWest sideSAGEFRAN623_23_396
Franklin36Sagemoor Pond10/04/2023Microcystin10.0000.150YesNoWest sideSAGEFRAN623_23_345
Franklin36Sagemoor Pond09/13/2023Microcystin10.0000.300YesNoWest SideSAGEFRAN623_23_286
Franklin36Sagemoor Pond08/23/2023Microcystin10.0000.150YesNoWest SideSAGEFRAN623_23_223
Franklin36Sagemoor Pond08/03/2023Microcystin17.3000.150YesViewWest sideSAGEFRAN623_23_143
Franklin36Sagemoor Pond07/12/2023Anatoxin-a 0.010NoViewWest SideSAGEFRAN623_23_079
Franklin36Sagemoor Pond07/12/2023Microcystin1.4000.150NoViewWest SideSAGEFRAN623_23_079
Franklin36Sagemoor Pond06/27/2023Anatoxin-a<MDL0.010NoViewWest SideSageFran623_23_058
Franklin36Sagemoor Pond06/27/2023Microcystin1.8000.150NoViewWest SideSageFran623_23_058
Franklin36Sagemoor Pond10/04/2022Microcystin3.7600.150NoViewWest sideSAGEFRAN623_22_364
Franklin36Sagemoor Pond09/12/2022Microcystin2.8900.150NoViewWest sideSAGEFRAN623_22_302
Franklin36Sagemoor Pond08/29/2022Anatoxin-a0.0330.010NoViewWest sideSAGEFRAN623_22_261
Franklin36Sagemoor Pond08/29/2022Microcystin263.0000.150YesViewWest sideSAGEFRAN623_22_261
Franklin36Sagemoor Pond08/15/2022Anatoxin-a<MDL0.010NoViewWest sideSAGEFRAN623_22_198
Franklin36Sagemoor Pond08/15/2022Cylindrospermopsin<MDL0.025NoViewWest sideSAGEFRAN623_22_198
Franklin36Sagemoor Pond08/15/2022Microcystin29.2000.150YesViewWest sideSAGEFRAN623_22_198
Franklin36Sagemoor Pond08/15/2022Saxitoxin<MDL0.020NoViewWest sideSAGEFRAN623_22_198
Franklin36Sagemoor Pond07/25/2022Anatoxin-a0.0320.010NoView SAGEFRAN623_22_113
Franklin36Sagemoor Pond07/25/2022Cylindrospermopsin<MDL0.025NoView SAGEFRAN623_22_113
Franklin36Sagemoor Pond07/25/2022Microcystin0.9180.150NoView SAGEFRAN623_22_113
Franklin36Sagemoor Pond07/25/2022Saxitoxin0.0250.020NoView SAGEFRAN623_22_113

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 Freshwater Algae Program please contact . 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.

© 2012 King County