Lake Status

Toxic Algae Monitoring


  • Regular monitoring has ended for the season.

Some species of blue-green algae (also known as cyanobacteria) can produce toxins harmful to human and animal health. The Jefferson County Water Quality Department monitors the following lakes for blue-green algae:
  • Anderson Lake
  • Gibbs Lake
  • Lake Leland
These lakes are monitored monthly and sampled for toxins if blue-green algae are suspected to be present. 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 algae blooms.

Lake Conditions


To see a map of the lake location, click the name of the lake in the table below.

Special Lake Statement

Sunset Lake - A toxic algae bloom at Sunset Lake was sampled on September 17 and was found to have a high toxin level. This lake has no public access and is not regularly monitored. Jefferson County Public Health recommends that anyone accessing the lake through private property follow the guidelines at the Warning level: Do not swim, do not drink lake water and keep pets away.

Lake
Date Last Observed
Status
Notes
Anderson Lake
October 2, 2017
Danger-Lake Closed
- Heavy bloom
- Toxic algae dominant
- Toxin level very high
Gibbs Lake
October 9, 2017
Caution
- Moderate bloom
- Toxic algae dominant
- Toxin level low
Lake Leland
October 23, 2017
Caution
- Heavy bloom
- Toxic algae present
- No toxins detected
Lake conditions can change rapidly and lake status may have changed since the last sample was taken. 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 (PNG). 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.