HomeMy WebLinkAbout101724 PacketSummer 2024 Algae Blooms
Michael Dawson, Water Quality Manager
Cyanobacteria
Most are
harmless, but
some can
produce toxins
•Microcystin
•Anatoxin-a
cyanotoxins
Weekly monitoring
Anderson Lake, boat ramp
Gibbs Lake, swimming beach
Lake Leland, boat ramp
Crocker Lake, boat ramp
Other lakes as needed –call if
you see a bloom 360-385-9444
www.JeffersonCountyPublicHealth.org/723/Lake-Water-Quality
www.nwtoxicalgae.org
Anderson Lake Closure
April 30, 2024
Above recreational guideline every year
Above danger threshold, 7/16 years
Above recreational guideline, 9/17 years
Above danger threshold, 2/17 years
Bloom severity and toxin
level are not closely
correlated
Both need to be
trending towards zero
over time to reopen
No warnings or closures
at other lakes
Crocker Lake 2024: no toxins detected
Recommendations
Maintain
monitoring
Begin in March
Explore other
outreach options
Encourage WDFW
to limit Anderson
fishery to winter
Future work
•DOH/Ecology Anderson Lake Study
•Remote sensing?
•River HABs?
Thank you!
jeffersoncountypublichealth.org
Environmental Health: 360-385-9444
@jeffcopublichealth_wa
facebook.com/jeffersoncountypublichealth