Platte Lake
Benzie County, Michigan2,531 acresView mapDirections
EGLE publishes the water-quality measurements for Platte Lake. Here is what has been measured.
- Impaired · Mercury
- 90 ft max depth
- Limited data
Platte Lake in Benzie County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 14 ft visibility. Maximum depth: 90 ft. Surface area: 2531.4 acres.
Platte Lake is a 2,531-acre lake in Benzie County, Michigan with a maximum depth of 90 feet.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2019-09-03. Methodology: how these readings are compared.
What Platte Lake is good for
From access and monitoring records, not editorial picks.
- Clear water14 ft of visibility
- Deep water90 ft surveyed max depth
- Big water2,531 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Platte Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pCBs. Check local advisories before you swim.
Whether Platte 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 Platte Lake
These are the measurements EGLE publishes for Platte 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 ft. TSI 39.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 14ft | 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 Platte Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
90 ft
Surface area
2,531 acres
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Stays near Platte Lake
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Fishing Platte Lake
Water Quality Trend: Stable
Based on 4 years of monitoring (2016–2019).
Water clarity
Stable4 years
EPA Impairment Status
Platte Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040601040206-03 · Official waterbody report
Nearby Lakes in Benzie County
Frequently asked questions about Platte Lake
Where is Platte Lake?
- Platte Lake is a lake in Benzie County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Platte Lake?
- Platte Lake in Benzie County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 14 ft visibility. Maximum depth: 90 ft. Surface area: 2531.4 acres.
Is Platte Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Platte Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pCBs. Check local advisories before you swim.
How deep is Platte Lake?
- Platte Lake has a maximum depth of 90 feet. The lake covers 2531.4 acres.
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Where this data comes from
64 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
NALMS64 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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database