Pentwater Lake
Oceana County, WisconsinLimited DataMesotrophic
Pentwater Lake is a mesotrophic lake in Oceana County, MI. Water quality is graded C based on 1 sampling years through 2022. The lake supports 1 documented fish species including Brown trout. Compared to the 4 other monitored lakes in Oceana County, Pentwater Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-09-30. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 7 ft. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 49 | 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 Pentwater Lake (14-day solunar calendar)
→ Is it safe to eat fish from Pentwater Lake? (mercury & PFAS guide)
→ Pentwater Lake fishing regulations (limits, seasons, special rules)
Location
County Ranking
Ranked #4 of 5 lakes in Oceana County
Cleaner Lakes Within 30 Miles
Pentwater Lake holds Grade C. 3 nearby lakes hold higher grades.
- ALower Hamlin Lake North Central Basin South of the NarrowsMason County · 20 mi · Two grade letters higher (C → A)
- BPentwater Lake Northwest Basin; Pentwater TownshipOceana County · 0.5 mi · Higher grade (C → B)
- BBig Star Lake Central Basin; Lake TownshipLake County · 24 mi · Higher grade (C → B)
Nearby Lakes in Oceana County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Cass County · Clarity: 7 ft
Leelanau County · Clarity: 9.5 ft
Iosco County · Clarity: 5.5 ft
Muskegon County · Clarity: 6.8 ft
Gladwin County · Clarity: 9 ft
Montmorency County · Clarity: 9 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: 2022-09-30
Monitoring stations: 1