Round Lake North Basin is a mesotrophic lake in Mecosta County, Michigan. Water quality is graded B based on 2 sampling years through 2023. Overall water quality is improving over recent sampling years. Compared to the 11 other monitored lakes in Mecosta County, Round Lake North Basin ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2023-09-15. Grade methodology: LakeGrade methodology.
Watch Round Lake North Basin water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 9.5 ft. Chlorophyll-a: 7.8 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.5 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 7.8 µg/L | B |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Round Lake North Basin
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Fishing Round Lake North Basin
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.875 m/yr | 3 |
| Chlorophyll-a | → Stable | +0.1 µg/L/yr | 3 |
Location
County Ranking
Ranked #9 of 12 lakes in Mecosta County
Cleaner Lakes Within 30 Miles
Round Lake North Basin holds Grade B. 3 nearby lakes hold higher grades.
- ABlue Lake North Central BasinMecosta County · 1.3 mi · Higher grade (B → A)
- AHorsehead Lake Northwest Basin; Martiny TownshipMecosta County · 4.4 mi · Higher grade (B → A)
- BMecosta Lake North Basin; Morton TownshipMecosta County · 0.8 mi · Higher overall water quality score
Nearby Lakes in Mecosta County
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Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-09-15
Monitoring stations: 1