Photo courtesy of K. Myhre
Lake Martha (North) is located in the Seven Lakes area north of the Tulalip reservation. The lake is 62.9 acres in size and one of the deepest lakes in the county at maximum depth of 70 feet and an average depth of 33 feet. Lake Martha's immediate watershed, or the land area that drains into the lake, is large at 967.8 acres and is primarily undeveloped.
Health Report Card |
In Depth Health Report |
Lakes experiencing toxic algae blooms are listed below and have been posted with WARNING signs. The WA State toxin testing program is closed for the winter, WARNING signs are posted when scum is present.
BLACKMANS LAKE
1/20/2021 - Blackmans Lake is experiencing intermittent blue-green algae blooms with
green scum near the shoreline. Previous sample results how that Microcystin, a liver toxin, were detected
at 22 ppb. This is above the WA state Recreational limits of 8
ppb. If
you would like to sign up for alerts, please visit the City of Snohomish website
and sign up for NewsFlash updates.
Please follow the guidelines on the WARNING sign when recreating.