Upper Straits Lake
Oakland County, Michigan345 acresView mapDirections
EGLE publishes the water-quality measurements for Upper Straits Lake. Here is what has been measured.
- 96 ft max depth
- Limited data
Upper Straits Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 14.5 ft visibility. Maximum depth: 96 ft. Surface area: 345.1 acres.
Upper Straits Lake is a 345-acre lake in Oakland County, Michigan with a maximum depth of 96 feet. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2019-09-23. Methodology: how these readings are compared.
What Upper Straits Lake is good for
From access and monitoring records, not editorial picks.
- Clear water14.5 ft of visibility
- Deep water96 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 Upper Straits 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 Upper Straits Lake
These are the measurements EGLE publishes for Upper Straits 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 14.5 ft. TSI 39.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 14.5ft | 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. | 39 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Upper Straits Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
96 ft
Surface area
345 acres
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Fishing Upper Straits Lake
Water Quality Trend: Worsening
Based on 4 years of monitoring (2016–2019).
Water clarity
Stable4 years
Phosphorus
Worsening+2.2 µg/L/yr4 years
Chlorophyll-a
Worsening+0.7 µg/L/yr3 years
Nearby Lakes in Oakland County
Frequently asked questions about Upper Straits Lake
Where is Upper Straits Lake?
- Upper Straits 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 Upper Straits Lake?
- Upper Straits Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 14.5 ft visibility. Maximum depth: 96 ft. Surface area: 345.1 acres.
Is Upper Straits Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Upper Straits Lake?
- Upper Straits Lake has a maximum depth of 96 feet. The lake covers 345.1 acres.
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Where this data comes from
37 measurements from 1 monitoring station, 2016–2019. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS37 samples · 2016–2019
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.