Morrison Lake
Ramsey County, WisconsinHypereutrophic
Morrison Lake is a highly nutrient-loaded hypereutrophic lake in Ramsey County, ND. Water quality is graded F based on 3 sampling years through 2023. Compared to the 7 other monitored lakes in Ramsey County, Morrison Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-10-17. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.9 ft of visibility. Phosphorus level: 564.5 µg/L. Chlorophyll-a: 85.9 µg/L. Trophic State Index: 79.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.9 ft | F |
| Phosphorus | 564.5 µg/L | F |
| Chlorophyll-a (Algae) | 85.9 µg/L | F |
| Trophic State Index (TSI) | 79 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Location
County Ranking
Ranked #8 of 8 lakes in Ramsey County
Cleaner Lakes Within 30 Miles
Morrison Lake holds Grade F. 5 nearby lakes hold higher grades.
- CDevils LakeRamsey County · 14.1 mi · Two grade letters higher (F → C)
- CDevils LakeBenson County · 21.5 mi · Two grade letters higher (F → C)
- DPelican LakeRamsey County · 16.6 mi · Higher grade (F → D)
- DSweetwater LakeRamsey County · 3.6 mi · Higher grade (F → D)
- DDry LakeRamsey County · 6.6 mi · Higher grade (F → D)
Nearby Lakes in Ramsey County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Hypereutrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-10-17
Monitoring stations: 1