Lake Status

Toxic Cyanobacteria Monitoring


Some species of cyanobacteria (also known as blue-green algae) can produce toxins harmful to human and animal health. The Jefferson County Water Quality Department monitors the following lakes for harmful blooms:
These lakes have a history of toxic cyanobacteria blooms, are monitored weekly in spring and summer and sampled for toxins monthly if blooms are visible. Other lakes are monitored as time and budget allow. Laboratory results are generally obtained by Friday and lake status is updated on this page. View the Lake Water Quality page for more information about toxic cyanobacteria blooms.

Lake Conditions


To see a map of the lake location, click the name of the lake in the table below.
Lake
Date Last Observed
Status
Notes
Anderson Lake
July 19, 2021
Danger - Lake Closed
- Heavy bloom
- Toxic cyanobacteria dominant
- Toxins present
Gibbs Lake
July 19, 2021
Danger - Lake Closed
- Heavy bloom
- Toxic cyanobacteria dominant
- Toxin level high
Lake Leland
July 19, 2021
Clear
- No bloom visible at boat ramp 7/19
- Toxic cyanobacteria present
- Toxin level low on 7/6
Crocker Lake
July 19, 2021
Clear - No bloom visible
SIlent Lake
May 4, 2021
Clear - No bloom visible
Tarboo Lake
July 20, 2021
Clear
- Public report of a bloom 7/12
- No bloom visible at boat ramp 7/20
Sandy Shore
June 7, 2021
Clear
- No bloom visible
Teal Lake
July 22, 2021
Clear
- No bloom visible 7/22
- Public report of a red bloom
Glen Cove Lagoon
July 19, 2021
Caution
- Red bloom visible
- No test performed, no public access

Lake conditions can change rapidly and lake status may have changed since the last sample was taken. Sampling is only done at one access point on the lake and conditions may be different elsewhere on the same lake. Regardless of what is posted here, if you observe a green paint-like scum or bloom on a lake follow the recommendations listed at the warning level. If you observe a bloom in a Jefferson County lake, please report it by calling 360-385-9444.

What the Status Sign Means

Clear Lake icon
Clear
No toxins detected in last sample, no toxic species present and no bloom visible. Note: there is no sign posted when the lake is clear.
Caution Toxic Algae Sign image
Caution
Toxins detected at low levels, toxic species may be present or bloom visible.
  • Do not swim in areas of scum.
  • Do not drink lake water.
  • Keep pets and livestock away.
  • Clean fish well and discard guts.
  • Avoid scum when boating.
  • Warning: Algae toxins may be present in fish tissue, please call your local health department, Jefferson County, at 360-385-9444 for more information.

Warning Toxic Algae Sign image
Warning
Toxins at or above state guidelines or extensive bloom dominated by toxic species.
  • Do not swim.
  • Do not drink lake water.
  • Keep pets and livestock away.
  • Clean fish well and discard guts.
  • Avoid scum when boating.
  • Warning: Algae toxins may be present in fish tissue, please call your local health department, Jefferson County, at 360-385-9444 for more information.

Danger Lake Closed Sign image
Danger
Lake closed by land manager’s decision.
  • Keep out of/off lake.