Oneal Lake
Emmet County, WisconsinOligotrophic
Oneal Lake is a 138-acre cold, clear oligotrophic lake in Emmet County, MI. Water quality is graded A based on 2 sampling years through 2022. Compared to the 9 other monitored lakes in Emmet County, Oneal Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2022-02-15. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
No clarity data. Phosphorus level: 4.2 µg/L. Chlorophyll-a: 6.6 µg/L. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 4.2 µg/L | A |
| Chlorophyll-a (Algae) | 6.6 µg/L | B |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 138 acres |
Location
County Ranking
Ranked #8 of 10 lakes in Emmet County
Nearby Lakes in Emmet County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
Mecosta County · Clarity: 12.8 ft
Benzie County · Clarity: 13.5 ft
Clare County · Clarity: 15 ft
Kalkaska County · Clarity: 16 ft
Gogebic County · Clarity: 18 ft
Iron County · Clarity: 16 ft
Oligotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Oneal Lake is a man-made reservoir impounded by the O'Neal Lake Dam (completed 1954), built primarily for recreation on the Big Sucker Creek; earth-type dam, 10 ft tall and 160 ft long.
- Surface area
- 138 ac
- Normal storage
- 500 ac-ft
- Max storage
- 1,250 ac-ft
- Drainage area
- 8.1 sq mi
- Hazard class
- Low
- Owner
- MDNR Parks & Recreation
Source: USACE National Inventory of Dams, NID ID MI00033 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2022-02-15
Monitoring stations: 1