Loon Lake; Lake Twp
Benzie County, WisconsinOligotrophic
Loon Lake; Lake Twp is a cold, clear oligotrophic lake in Benzie County, MI. Water quality is graded A based on 2 sampling years through 2022. The lake supports 13 documented fish species including Black bullhead, Blackchin shiner, and Bluegill. Compared to the 34 other monitored lakes in Benzie County, Loon Lake; Lake Twp ranks #18 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-09-10. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 12 ft. Chlorophyll-a: 2.1 µg/L. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 2.1 µg/L | A |
| Trophic State Index (TSI) | 40 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Loon Lake; Lake Twp (14-day solunar calendar)
→ Is it safe to eat fish from Loon Lake; Lake Twp? (mercury & PFAS guide)
→ Loon Lake; Lake Twp fishing regulations (limits, seasons, special rules)
Location
County Ranking
Ranked #18 of 35 lakes in Benzie County
Nearby Lakes in Benzie County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
Mecosta County · Clarity: 12.8 ft
Clare County · Clarity: 15 ft
Kalkaska County · Clarity: 16 ft
Gogebic County · Clarity: 18 ft
Iron County · Clarity: 16 ft
Leelanau County · Clarity: 15.5 ft
Oligotrophic Lakes in Wisconsin
EPA Impairment Status
Loon Lake; Lake Twp is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MI040601040206-05 · Official waterbody report · Matched by proximity (0.16 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2022-09-10
Monitoring stations: 1