Advisory updates and other information to encourage safe recreation

June 5th, 2025

NO CURRENT ADVISORY

• Battle Ground Lake
• Klineline Pond
• 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

• Lacamas Lake (issued 6/4/2025)



A harmful algal bloom is present and toxicity is above recreational guidance at Lacamas Lake.

• Swimming or water skiing not advised anywhere on lake.
• Avoid areas of scum when using motorized boats, paddle boarding, kayaking, or canoeing.
• Do not drink lake water.
• Animal should avoid all water contact.
• When fishing, clean fish well and discard organs.

Next Sampling Dates

• E.coli (bacteria): June 9th, 2025
• Harmful Algae (cyanobacteria): June 9th, 2025 

This is...

a regular plant!

Filamentous green algae, while unsightly in swimming waters, is not toxic.

This is...

a harmful algae bloom!

Deposits on the shore may turn blue/teal as certain species die.

This is...

a harmful algae bloom!

Streaky green scums like this are common.

This is...

a harmful algae bloom!

Blooms can affect water clarity, creating colorful clouds.

This is...

a regular plant!

Duckweed is a layer of tiny, floating leaves on the surface of the water.

This is...

a harmful benthic algae mat!

Many species are dark green/brown, and grow in clumps below the surface.

This is...

a regular plant!

Eurasian milfoil, while common in our waterways, is a highly invasive aquatic plant. Caution: the roots may cause entanglement!

This is...

a harmful algae bloom!

Especially as they die, cyanobacteria may show up yellow/brown. Careful; this may also be pollen! We use a microscope to confirm.

This is...

a harmful algae bloom!

This one appears as the classic pea soup, or green paint spill. The bloom layer can even be several centimeters thick.

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.

Click the icons to follow us

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

1601 E. Fourth Plain Blvd, Building 17

Vancouver, WA 98661