Advisory updates and other information to encourage safe recreation

May 30th, 2025

FIRST ISSUE OF 2025

NO CURRENT ADVISORY

Battle Ground Lake
Klineline Pond
Lacamas Lake
Round Lake
Vancouver Lake

There are no current advisories at these lakes. To report a suspected harmful algal bloom or other water quality concern, go here.

WARNING ADVISORY

NONE

There are no current advisories at any lakes. To report a suspected harmful algal bloom or other water quality concern, go here.

Next Sampling Dates

E.coli (bacteria): June 9th, 2025
Harmful Algae (cyanobacteria): site visits June 2nd, 2025. No blooms reported yet.

View advisory map

More information on harmful algal blooms

Report a Suspected Bloom

What's the buzz on benthic algae?

Check out the latest swim beach news release below.

"Benthic algae mats in Columbia River pose risks to people, pets

Vancouver, Wash. – Clark County residents and dog owners who recreate in the Columbia River and along its shorelines should be on the lookout for a newly reported type of harmful algae that caused the death of a dog in October.

Benthic algae mats are typically attached to riverbeds or lakebeds, but pieces of the mats can detach and float on the surface of the waterbody or wash ashore. The algae mats can contain toxins that can make people and pets sick and can be fatal to pets.

Clark County Public Health first learned about the presence of benthic algae mats in Clark County when a dog died after eating algae along the shoreline of an island in the Columbia River in October. Testing of the dog’s stomach contents and samples of algae collected from the site by Public Health staff indicated cyanotoxin poisoning..."

Continued here:

Clark County Public Health News Release 5/30/25

Possible benthic mat material at Cottonwood Beach 5/29/25 (above)

Photo courtesy of Benton-Franklin Health District

Benthic Algae Mat Brochure

Benthic Algae Mat Postcard

Benthic Algae Mat More Info

Meet our summer intern, Mathena!

Mathena just finished their second year at the State University of New York, College of Environmental Science and Forestry (SUNY ESF) pursuing their degree in environmental health focusing in hydrogeology and minoring in mathematics.

Mathena is originally from around Albany, New York, and they love hiking in the beautiful Adirondack and Catskill mountains. Mathena is thrilled to be working with such a great team in Rec Water Safety, and is honored to help protect the health of people and pets this swimming season!

Mathena is joining us from the National Environmental Public Health Internship Program, and will be conducting weekly beach site visits, water quality sampling, swim beach sanitary surveys, and providing education at outreach events.

Have a swim beach related question? Ask us here!

To stay up to date on our harmful algal bloom monitoring, follow us on Facebook or Twitter.

Our weekly newsletter updates will continue through Labor Day 2024, our monitoring of blooms will continue through this fall. Follow us on Facebook and Twitter for advisory updates.

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For more resources, previous newsletters, and other information about our beach/lake monitoring, visit our website FAQ page.

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Current Advisories

Clark County Public Health | clark.wa.gov/public-health

1601 E. Fourth Plain Blvd, Building 17

Vancouver, WA 98661