Environmental Health
Surface Water (Lakes, Rivers & Streams)
Swimming in Thurston County
  SUMMIT LAKE  
 
TOXIC ALGAE ADVISORY FOR SUMMIT LAKE
LIFTED 4/25/19 Results Below Reporting Detection Limit
Follow Purging Plumbing Guidelines


4/15/19 Sample - Anatoxin-a level at 0.028 ug/L - Below the Advisory Level of 1 ug/L
(We need to have two (2) consecutive weeks with samples below the advisory level.)

4/8/19 Sample - Anatoxin-a level at 18.126 ug/L - Above Advisory Level of 1 ug/L

~~~~~

2019 Summit Lake Sample Map - Updated 4/25/19

2018 Summit Lake Sample Map - Updated 5/17/18
     
 

Purging Household Plumbing - What to Do After Algal Bloom

After an algal bloom we recommend that all household plumbing be purged prior to resuming water usage.

What to Do During an Algal Bloom

  • Do not drink the lake water or use the lake water for household use until laboratory tests show the water is safe. Even homes with disinfection and treatment systems will want to take precautions because water treatment systems do not remove or deactivate algae toxin.  
     
  • Keep pets and livestock away from areas where algae blooms are present.
  • Avoid contact with water containing algae. Do not swim or water ski.
      
  • When fishing, use only catch-and-release of any fish caught during an algae bloom.
     
  • Do not eat fish that come from the lake during an algae bloom.
     
  • Avoid areas of scum when boating.

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 is 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.

Other Items of Interest

  • 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.         

More Information

 
 
NEWS & Info
Contacts
  • Report algae blooms or swimming-related illness
    360-867-2626
  • General Questions
    360-867-2626
This page last updated: