Au Sable Lake
Ogemaw County, WisconsinLimited DataMesotrophic
Au Sable Lake is a mesotrophic lake in Ogemaw County, MI. Water quality is graded B based on 1 sampling years through 2022. The lake supports 11 documented fish species including Bluegill, Bluntnose minnow, and Iowa darter. Compared to the 1 other monitored lakes in Ogemaw County, Au Sable Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-09-20. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 10 ft. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Au Sable Lake (14-day solunar calendar)
→ Is it safe to eat fish from Au Sable Lake? (mercury & PFAS guide)
→ Au Sable Lake fishing regulations (limits, seasons, special rules)
Location
County Ranking
Ranked #2 of 2 lakes in Ogemaw County
Cleaner Lakes Within 30 Miles
Au Sable Lake holds Grade B. 4 nearby lakes hold higher grades.
- AAu Sable Lake East Central Basin,Goodar TownshipOgemaw County · 0.4 mi · Higher grade (B → A)
- AChain Lakes East BasinIosco County · 5.2 mi · Higher grade (B → A)
- ALoon Lake East Basin; T25north R2eOscoda County · 12.1 mi · Higher grade (B → A)
- AJewell Lake West BasinAlcona County · 23 mi · Higher grade (B → A)
Nearby Lakes in Ogemaw County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Lapeer County · Clarity: 9.5 ft
Livingston County · Clarity: 13 ft
Manistee County · Clarity: 11 ft
Lake County · Clarity: 14 ft
Cass County · Clarity: 10.5 ft
Genesee County · Clarity: 10 ft
Mesotrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2022-09-20
Monitoring stations: 1