Sunnybrook Lake

Sunnybrook Lake sits at a C on the grading scale — not impaired, not pristine, with summer measurements that vary year to year. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Sunnybrook Lake sits at rank 50 of 83 in Washington County, in the lower half of the local distribution.

Eurasian watermilfoil has been documented at Sunnybrook Lake, requiring shoreline management to keep dense mats from crowding native vegetation. The state fisheries records do not list documented species for Sunnybrook Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. Ice-out has been recorded 18 times at Sunnybrook Lake, with a median around Apr 3. The grade is supported by multiple sampling years from Minnesota PCA volunteers and partner agencies, giving the letter a reasonably stable foundation.