Moody Lake

Moody Lake earns a D — measurements through 2024 show persistent nutrient pressure that limits clarity through the summer. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

At a TSI of 59, Moody Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. The lake bottoms out at 48 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. The lake is compact at 45 acres, with 1.0 miles of shoreline and little volume to buffer nutrient inputs. Within Chisago County's 33 graded lakes, Moody Lake ranks 24 — below the local median, though not at the bottom.

Moody Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Moody Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Moody 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.