Mary Lake Central Basin Southeast; Waucedah Township is a 230-acre cold, clear oligotrophic lake in Dickinson County, Michigan. Water quality is graded B based on 1 sampling years through 2022. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 5 other monitored lakes in Dickinson County, Mary Lake Central Basin Southeast; Waucedah Township ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2022-09-05. Grade methodology: LakeGrade methodology.
Watch Mary Lake Central Basin Southeast; Waucedah Township water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 13.8 ft. Trophic State Index: 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.8 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 230 acres |
| Public Access | Yes |
Where to stay near Mary Lake Central Basin Southeast; Waucedah Township
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Fishing Mary Lake Central Basin Southeast; Waucedah Township
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.88 m/yr | 2 |
Recreation & Access
Location
County Ranking
Ranked #4 of 6 lakes in Dickinson County
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Low nutrients, clear water, excellent for swimming
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Other Grade B Lakes in Michigan
Marquette County · Clarity: 11.8 ft
Iron County · Clarity: 12.5 ft
Iron County · Clarity: 13 ft
Marquette County · Clarity: 12 ft
Marquette County · Clarity: 14.3 ft
Iron County · Clarity: 11 ft
Oligotrophic Lakes in Michigan
More records, surveys & data sources
Reservoir Info (USACE NID)
Mary Lake Central Basin Southeast; Waucedah Township is a man-made reservoir impounded by the Mary Lake Dam, built primarily for other on the Hamilton Creek; concrete-type dam, 7 ft tall and 237 ft long.
- Surface area
- 230 ac
- Normal storage
- 350 ac-ft
- Max storage
- 764 ac-ft
- Drainage area
- 15.1 sq mi
- Hazard class
- Low
- Owner
- Waucedah Township
Source: USACE National Inventory of Dams, NID ID MI01247 · Operator website · Matched by proximity (0.24 km)
EPA Impairment Status
Mary Lake Central Basin Southeast; Waucedah Township is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040301080407-01 · Official waterbody report · Matched by proximity (2.48 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2022-09-05
Monitoring stations: 1