Environmental Health
Surface Water (Lakes, Rivers & Streams)
Swimming in Thurston County

Toxic Algae Advisory Lifted for Summit Lake
Effective 6/28/17

Thurston County Public Health recommends that all household plumbing be purged prior to resuming water usage.

Instructions on how to purge your system are provided here [PDF]

Please Note: Department of Fish and Wildlife Have Reopened the Boat Lauch at Summit Lake

Frequently Asked Questions PDF (Updated 5/19/17)

You can call the Public Information Line to get the most current information:

Purging Household Plumbing - What to Do After Algal Bloom

Thurston County Public Health has lifted the toxic algae advisory for Summit Lake. All sample results for the last two weeks were less than one microgram per liter, the level of public health concern.

  • For a map of Summit Lake Algae Toxin Testing sample locations, click here PDF 

Other Items of Interest

  • The Washington State Department of Fish and Wildlife closed the public boat ramp in response to the advisory, but will re-open the ramp on Thursday, June 29.

  • Any resident with new information to report, including any dead animals in or near the lake, should contact Thurston County Public Health at 360-867-2626. 

  • The Summit Lake Community Association is forming a Water Quality Team to develop water quality related projects and solutions going forward. To stay informed about this team's work, or to get involved, please email the Association at summitlakeslca@gmail.com and ask to be put on the Water Quality Team email list.         

Private Lab Testing Available to Residents

  • There are different methodologies for testing non-potable water and drinking water. Ask to be sure the lab is accredited for the test you are looking for. For drinking water samples the method is EPA 545. This method used for clean tap samples but is not appropriate for thick blooms. Discuss your particular situation with the lab. Typically the laboratory will supply the correct sample bottle and directions which are likely to include keeping the sample cold and dark during shipping, ship overnight to the lab, and letting the lab know if there is chlorine in the sample.

More Information

NEWS & Info
  • Report algae blooms or swimming-related illness
  • General Questions
This page last updated: 07/14/17