Augustine Lake

On the scoring rubric Augustine Lake grades a D: clarity at 4.0 ft and phosphorus readings still being added keep it in the lower bracket for Ashland County.

At a TSI of 57, Augustine Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. Augustine Lake is a shallow lake at 10 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. The lake's 171 acres and partial shoreline records put it in the mid-range bucket — large enough for varied use, small enough that watershed inputs reach the whole basin. Augustine Lake ranks 9 of 10 in Ashland County — at the lower end of the locally monitored distribution.

Augustine Lake has at least one documented invasive species (Purple Loosestrife), so boaters and anglers should observe clean-drain-dry steps when leaving the lake. The fishery is bass-led, with 4 documented species across the lake's records. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.