Cedar Island Lake
Oakland County, Michigan290 acresView mapDirections
EGLE publishes the water-quality measurements for Cedar Island Lake. Here is what has been measured.
- 72 ft max depth
- Public access
- Limited data
Cedar Island Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10.5 ft visibility. Maximum depth: 72 ft. Surface area: 290 acres.
Free interactive depth-contour map of Cedar Island Lake, reaching a maximum surveyed depth of 72 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Cedar Island Lake is a 290-acre lake in Oakland County, Michigan with a maximum depth of 72 feet. Overall water quality is improving over recent sampling years. The lake supports 1 documented fish species including Lake herring. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-17. Methodology: how these readings are compared.
What Cedar Island Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10.5 ft of visibility
- Boat launch1 documented ramp
- Deep water72 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Cedar Island Lake is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Cedar Island Lake
These are the measurements EGLE publishes for Cedar Island Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 10.5 ft. TSI 43.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 10.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 43 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Cedar Island Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
72 ft
Surface area
290 acres
Public access
Yes
Listed by EGLE
Recreation & Access
- Cedar Island LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Cedar Island Lake
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Top-rated places to stay near Cedar Island Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Cedar Island Lake
Water Quality Trend: Improving
Based on 7 years of monitoring (2016–2023).
Water clarity
Improving7 years
Phosphorus
Worsening+0.94 µg/L/yr7 years
Chlorophyll-a
Improving-0.13 µg/L/yr7 years
Reservoir Info (USACE NID)
Cedar Island Lake is a man-made reservoir impounded by the Oxbow Dam (completed 1964), built primarily for recreation on the Huron River; earth-type dam, 15 ft tall and 255 ft long.
- Surface area
- 290 ac
- Normal storage
- 6,900 ac-ft
- Max storage
- 2,100 ac-ft
- Drainage area
- 25.7 sq mi
- Hazard class
- High
- Owner
- Oakland County Drain Commissioner
Source: USACE National Inventory of Dams, NID ID MI00263 · Operator website · Matched by proximity (0.97 km)
Nearby Lakes in Oakland County
Frequently asked questions about Cedar Island Lake
Where is Cedar Island Lake?
- Cedar Island Lake is a lake in Oakland County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Cedar Island Lake?
- Cedar Island Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10.5 ft visibility. Maximum depth: 72 ft. Surface area: 290 acres.
Is Cedar Island Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Cedar Island Lake?
- Cedar Island Lake has a maximum depth of 72 feet. The lake covers 290 acres.
What fish are in Cedar Island Lake?
- Fish species found in Cedar Island Lake include Lake herring. Cedar Island Lake is located in Oakland County, Michigan.
Are there boat ramps on Cedar Island Lake?
- Cedar Island Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Cedar Island Lake. Public access is listed as yes.
Can I fish at Cedar Island Lake?
- Cedar Island Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Michigan's fish and wildlife agency, so check its current regulations before you go.
Explore Cedar Island Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
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Fish species and best lakes in Oakland County
Species activity outlook by water temperature and season
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Where this data comes from
27 measurements from 1 monitoring station, 2018–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS27 samples · 2018–2022
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory