Lake Margrethe
Crawford County, Michigan1,920 acresView mapDirections
EGLE publishes the water-quality measurements for Lake Margrethe. Here is what has been measured.
- Impaired · Mercury
- 65 ft max depth
- Public access
- Limited data
Lake Margrethe in Crawford County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 16 ft visibility. Maximum depth: 65 ft. Surface area: 1919.7 acres.
Lake Margrethe is a 1,920-acre lake in Crawford County, Michigan with a maximum depth of 65 feet. Water clarity is improving over recent sampling years. The lake supports 21 documented fish species including Bluegill, Bluntnose minnow, and Brown bullhead. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2021-09-17. Methodology: how these readings are compared.
Lake Margrethe covers about 1,900 acres in Crawford County. It has one public boat landing. For a place on the water, look through cabin and lake-house rentals near Lake Margrethe on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Lake Margrethe is good for
From access and monitoring records, not editorial picks.
- Clear water16 ft of visibility
- Boat launch1 documented ramp
- Fishing21 species recorded
- Deep water65 ft surveyed max depth
- Big water1,920 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Lake Margrethe is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pFAS. Check local advisories before you swim.
Whether Lake Margrethe 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 Lake Margrethe
These are the measurements EGLE publishes for Lake Margrethe, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 16 ft down. TSI 37.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 16ft | 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. | 37 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Lake Margrethe
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
65 ft
Surface area
1,920 acres
Public access
Yes
Listed by EGLE
Recreation & Access
- Lake Margrethe (West)Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Lake Margrethe
Compare lakeside cabins, hotels, and vacation rentals near Lake Margrethe in Crawford 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 Lake Margrethe
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Fish Species
Click a species to see every lake where it is documented.
Fishing Lake Margrethe
Water Quality Trend: Stable
Based on 7 years of monitoring (2016–2023).
Water clarity
Improving6 years
Phosphorus
Worsening+0.35 µg/L/yr5 years
Chlorophyll-a
Stable0 µg/L/yr3 years
EPA Impairment Status
Lake Margrethe 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 MI040601030104-04 · Official waterbody report
Nearby Lakes in Crawford County
Frequently asked questions about Lake Margrethe
Where is Lake Margrethe?
- Lake Margrethe is a lake in Crawford County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Lake Margrethe?
- Lake Margrethe in Crawford County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 16 ft visibility. Maximum depth: 65 ft. Surface area: 1919.7 acres.
Is Lake Margrethe safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Margrethe is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pFAS. Check local advisories before you swim.
How deep is Lake Margrethe?
- Lake Margrethe has a maximum depth of 65 feet. The lake covers 1919.7 acres.
What fish are in Lake Margrethe?
- Fish species found in Lake Margrethe include Bluegill, Bluntnose minnow, Brown bullhead, Central mudminnow, Common shiner, Creek chub, Johnny darter, Largemouth bass, Mimic shiner, Northern logperch, Northern longear sunfish, Northern pike, Northern redbelly dace, Pumpkinseed, Rock bass, Sand shiner, Smallmouth bass, Spottail shiner, Walleye, White sucker, Yellow perch. Lake Margrethe is located in Crawford County, Michigan.
Are there boat ramps on Lake Margrethe?
- Lake Margrethe has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Margrethe (West). Public access is listed as yes.
Can I fish at Lake Margrethe?
- Lake Margrethe 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
51 measurements from 1 monitoring station, 2016–2021. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS51 samples · 2016–2021
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
Named boat-access points from the USGS National Boat Ramps inventory