Susan Lake
Charlevoix County, WisconsinLimited DataOligotrophic
Susan Lake is a cold, clear oligotrophic lake in Charlevoix County, MI. Water quality is graded A based on 1 sampling years through 2021. The lake supports 12 documented fish species including Blacknose shiner, Bluegill, and Bluntnose minnow. Compared to the 18 other monitored lakes in Charlevoix County, Susan Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-10-14. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
No clarity data. Phosphorus level: 10.9 µg/L. Trophic State Index: 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 10.9 µg/L | A |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 39 | 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 Susan Lake (14-day solunar calendar)
→ Is it safe to eat fish from Susan Lake? (mercury & PFAS guide)
→ Susan Lake fishing regulations (limits, seasons, special rules)
Location
County Ranking
Ranked #6 of 19 lakes in Charlevoix County
Nearby Lakes in Charlevoix County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
Mecosta County · Clarity: 12.8 ft
Benzie County · Clarity: 13.5 ft
Clare County · Clarity: 15 ft
Kalkaska County · Clarity: 16 ft
Gogebic County · Clarity: 18 ft
Iron County · Clarity: 16 ft
Oligotrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-10-14
Monitoring stations: 1