Lower Phantom Lake

On the LakeGrade scale Lower Phantom Lake grades a B, with clarity at 6.7 ft and 16 µg/L of phosphorus placing it above the Wisconsin median. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

Mesotrophic conditions dominate at Lower Phantom Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. Lower Phantom Lake is a shallow lake at 12 ft maximum depth, which means it warms quickly, mixes constantly, and amplifies nutrient inputs. At 373 acres, Lower Phantom Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. Lower Phantom Lake sits at rank 28 of 45 in Waukesha County, in the lower half of the local distribution.

Lower Phantom Lake is on the Wisconsin infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. The fishery is bass-led, with 3 documented species across the lake's records. A documented public access point at Lower Phantom Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.