Platte Lake
Platte Lake in Benzie County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 14 ft visibility. Maximum depth: 90 ft. Surface area: 2531.4 acres.
- Clarity
- 14 ft
- Max depth
- 90 ft
- Area
- 2,531 acres
- Trend
- → Stable
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Why Platte Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Platte Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Platte Lake is a 2,531-acre lake in Benzie County, Michigan with a maximum depth of 90 feet. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2019-09-03. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Platte Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 14 ft. Trophic State Index: 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Platte Lake
Compare lakeside cabins, hotels, and vacation rentals near Platte Lake in Benzie County, Michigan — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Platte Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 90 ft |
| Surface Area | 2,531 acres |
Recreation & Access
Fishing Platte Lake
Water Quality Trend: → Stable
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.071 m/yr | 4 |
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
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040601040206-03 · Official waterbody report
Graded lakes near Platte Lake
Platte Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Benzie County
Frequently asked questions about Platte Lake
Where is Platte Lake?
- Platte Lake is a lake in Benzie County, Michigan. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Platte Lake?
- Platte Lake in Benzie County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 14 ft visibility. Maximum depth: 90 ft. Surface area: 2531.4 acres.
Is Platte Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Platte Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Platte Lake?
- Platte Lake has a maximum depth of 90 feet. The lake covers 2531.4 acres.
Are there boat ramps on Platte Lake?
- Platte Lake has 1 documented boat landing in the USGS National Boat Ramps inventory.
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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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory