Lake Lorraine

The LakeGrade rubric puts Lake Lorraine at a C: clarity readings still being added, 54 µg/L of phosphorus, and a TSI of 62 signal an intermediate trophic state. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

At a TSI of 62, Lake Lorraine reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. Lake Lorraine is a shallow lake at 8 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. At 155 acres, Lake Lorraine fits the Wisconsin median for monitored lakes, with partial shoreline records. Within Walworth County's 35 graded lakes, Lake Lorraine ranks 24 — below the local median, though not at the bottom.

Eurasian watermilfoil is established at Lake Lorraine, which can dampen recreational access and pressure the native plant community. The fishery is bass-led, with 2 documented species across the lake's records. Public access is available — the lake is on the Wisconsin DNR public-access list. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.