Dion Lake
Rolette County, WisconsinLimited DataMesotrophic
Dion Lake is a mesotrophic lake in Rolette County, ND. Water quality is graded C based on 1 sampling years through 2025. Compared to the 13 other monitored lakes in Rolette County, Dion Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2025-10-01. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 8.5 ft. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.5 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Location
County Ranking
Ranked #8 of 14 lakes in Rolette County
Cleaner Lakes Within 30 Miles
Dion Lake holds Grade C. 4 nearby lakes hold higher grades.
- ALake UpsilonRolette County · 2.7 mi · Two grade letters higher (C → A)
- BJarvis Lake CenterRolette County · 4.1 mi · Higher grade (C → B)
- BWheaton LakeRolette County · 6.3 mi · Higher grade (C → B)
- BGordon Center LakeRolette County · 6.6 mi · Higher grade (C → B)
Nearby Lakes in Rolette County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
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: 2025-10-01
Monitoring stations: 1