Lake Marie
Mercer County, WisconsinMesotrophic
Lake Marie is a 30-acre mesotrophic lake in Mercer County, MO. Water quality is graded B based on 3 sampling years through 2023. Compared to the 1 other monitored lakes in Mercer County, Lake Marie ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-08-01. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 7.8 ft. Phosphorus level: 13 µg/L. Chlorophyll-a: 2.7 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.8 ft | C |
| Phosphorus | 13 µg/L | A |
| Chlorophyll-a (Algae) | 2.7 µg/L | A |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 30 acres |
Location
County Ranking
Ranked #1 of 2 lakes in Mercer County
Nearby Lakes in Mercer County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Lake Marie is a man-made reservoir impounded by the Lake Marie Dam (completed 1981), built primarily for recreation on the POPS BRANCH; earth-type dam, 50 ft tall and 1,100 ft long.
- Surface area
- 30 ac
- Normal storage
- 882 ac-ft
- Max storage
- 970 ac-ft
- Drainage area
- 0.53 sq mi
- Hazard class
- High
- Owner
- LAKE MARIE HOA
Source: USACE National Inventory of Dams, NID ID MO10154 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-08-01
Monitoring stations: 1