Cedar Is Lake
Oakland County, MichiganView mapDirections
EGLE publishes the water-quality measurements for Cedar Is Lake. Here is what has been measured.
- Mesotrophic
- Limited data
Cedar Is Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10.8 ft visibility. Phosphorus: 15.5 µg/L.
Cedar Is Lake is a mesotrophic lake in Oakland County, Michigan. Overall water quality is improving over recent sampling years. The lake supports 1 documented fish species including Lake herring. Compared to the 28 other monitored lakes in Oakland County, Cedar Is Lake ranks #22 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-22. Methodology: how these readings are compared.
What Cedar Is Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10.8 ft of visibility
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Cedar Is 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 Is Lake
These are the measurements EGLE publishes for Cedar Is 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 10.8 ft. Phosphorus 15.5 µg/L. TSI 43.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 10.8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 15.5µg/L | Good GoodFairPoor |
| 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 Is Lake
Answers come straight from the public measurements and survey records on this page.
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Fish Species
Click a species to see every lake where it is documented.
Fishing Cedar Is Lake
Water Quality Trend: Improving
Based on 7 years of monitoring (2016–2023).
Water clarity
Improving7 years
Phosphorus
Worsening+0.99 µg/L/yr7 years
Chlorophyll-a
Improving-0.13 µg/L/yr7 years
Nearby Lakes in Oakland County
Frequently asked questions about Cedar Is Lake
Where is Cedar Is Lake?
- Cedar Is 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 Is Lake?
- Cedar Is Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10.8 ft visibility. Phosphorus: 15.5 µg/L.
Is Cedar Is Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What fish are in Cedar Is Lake?
- Fish species found in Cedar Is Lake include Lake herring. Cedar Is Lake is located in Oakland County, Michigan.
Explore Cedar Is Lake across LakeQuality
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Species activity outlook by water temperature and season
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Where this data comes from
41 measurements from 1 monitoring station, 2018–2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS41 samples · 2018–2023
Analytical methods
- Phosphorus by Colorimetry
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.