Advisory updates and other information to encourage safe recreation

July 14th 2023 Update

Advisory information listed below:

NO CURRENT ADVISORY

• Battle Ground Lake
• Klineline Pond
• Vancouver Lake**
• Round Lake

**A potentially harmful algal bloom is present and being monitored. Toxicity is currently below advisory threshold but areas of scum should be avoided.

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

A WARNING advisory has been issued due to a reported harmful algal bloom that tested for cyanotoxins above recreational guidance at this lake. Cyanotoxin results can be viewed at the NW Toxic Algae website. Advisory will remain in place until toxicity levels are below threshold for 2 consecutive weeks.

For more information on harmful algal blooms on how to protect yourself and family, click here.

Vancouver Lake swim beach bloom 7/10/2023. This bloom has two different kinds of cyanobacteria.

Next Sampling Dates

• E.coli/bacteria: July 24th
• Harmful Algae/Cyanobacteria: July 17th

Public Health In Action: Under the Microscope

Aphanizomenon at Vancouver Lake, Dolichospermum at Lacamas Lake, and Microcystis at Round Lake.

All photos from 2022.

Did you know that we evaluate every algae bloom sample under microscope? One sample goes to the lab for toxicity testing, the other stays with us to be looked at under microscope. We identify the number and genus of cyanobacteria present to see if it is capable of producing toxins. This helps us determine how we need to monitor that lake moving forward.

Have a safe and fun swim season!

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 2023, our monitoring of blooms will continue through this fall. Follow us on Facebook and Twitter for advisory updates.

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

1601 E. Fourth Plain Blvd, Building 17

Vancouver, WA 98661