Jehnsen Lake
Mecosta County, Michigan316 acresView mapDirections
No nutrient or algae sampling on record from EGLE for this lake.
- 15 ft max depth
- Public access
Jehnsen Lake in Mecosta County, Michigan has water-quality measurements published by EGLE, shown here as reported. Maximum depth: 15 ft. Surface area: 316.1 acres.
Water clarity at Jehnsen Lake
Clear water. Across summers from 2018 to 2023, Jehnsen Lake averaged 3.16 m (10 ft) of visibility down into the water, so you can typically see several feet down in midsummer. This lake sits close to the line between clarity classes, so treat the label as approximate and the depth reading as the real number.
Nobody has taken a water sample here that we can find. Michigan's environmental agency measures clarity on lakes like this one from satellite images instead, which is why this page reports how clear the water is and no phosphorus or algae readings.
Clear is not the same as clean. A lake can be easy to see through and still carry high nutrient levels, and a naturally tea-stained lake can be perfectly healthy. The nutrient and algae readings on other lakes come from phosphorus and chlorophyll-a measured in a laboratory, and clarity alone cannot stand in for them.
The same satellite images put summer algae here at roughly 5.12 micrograms per litre. Estimating algae from orbit is far less exact than measuring clarity, so that figure is worth knowing and is not part of any rating.
Jehnsen Lake is a 316-acre lake in Mecosta County, Michigan with a maximum depth of 15 feet (7-foot average). Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE. Methodology: how these readings are compared.
What Jehnsen Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Jehnsen 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 Jehnsen Lake
These are the measurements EGLE publishes for Jehnsen Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Jehnsen Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
15 ft
Average depth
7 ft
Surface area
316 acres
Shoreline
1.3 mi
Public access
Yes
Listed by EGLE
Recreation & Access
- Jehnsen LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Fishing Jehnsen Lake
Nearby Lakes in Mecosta County
Frequently asked questions about Jehnsen Lake
Where is Jehnsen Lake?
- Jehnsen Lake is a lake in Mecosta County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Jehnsen Lake?
- Jehnsen Lake in Mecosta County, Michigan has water-quality measurements published by EGLE, shown here as reported. Maximum depth: 15 ft. Surface area: 316.1 acres.
Is Jehnsen Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Jehnsen Lake?
- Jehnsen Lake has a maximum depth of 15 feet and an average depth of 7 feet. The lake covers 316.1 acres.
Are there boat ramps on Jehnsen Lake?
- Jehnsen Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Jehnsen Lake. Public access is listed as yes.
Can I fish at Jehnsen Lake?
- Jehnsen 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.
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Where this data comes from
Measurements for Jehnsen Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory