Fish Lake

Fish Lake earns a D — measurements through 2024 show persistent nutrient pressure that limits clarity through the summer. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

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. Fish Lake ranks 70 of 83 in Washington County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Fish Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Fish Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Fish Lake — most use is by shoreline residents and their guests. The grade is supported by multiple sampling years from Minnesota PCA volunteers and partner agencies, giving the letter a reasonably stable foundation.