Lake Mary
Kenosha County, Wisconsin327 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Lake Mary. Here is what has been measured.
- Mesotrophic
- 3 aquatic invasives
- 33 ft max depth
- Public access
Lake Mary in Kenosha County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 6.4 ft visibility. Phosphorus: 15.5 µg/L. Maximum depth: 33 ft. Surface area: 327 acres.
Wisconsin DNR lists Panfish as common on Lake Mary. DNR survey details →
Lake Mary is a 327-acre mesotrophic lake in Kenosha County, Wisconsin with a maximum depth of 33 feet. Overall water quality is improving over recent sampling years. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing. Compared to the 7 other monitored lakes in Kenosha County, Lake Mary ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-05-21. Methodology: how these readings are compared.
What Lake Mary is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing4 species recorded
- Deep water33 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake Mary is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Mary
These are the measurements Wisconsin DNR publishes for Lake Mary, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 6.4 ft. Phosphorus 15.5 µg/L. TSI 47.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6.4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 15.5µg/L | Good GoodFairPoor |
| 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. | 47 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lake Mary
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as common on Lake Mary.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lake Mary’s water-quality measurements separately, and the water-quality trend over 5 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
33 ft
Surface area
327 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
12 sq mi
HydroLAKES / HydroSHEDS
Shoreline
3.3 mi
HydroLAKES / HydroSHEDS
Elevation
787 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Lance Memorial ParkPublic
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 Mary
Compare lakeside cabins, hotels, and vacation rentals near Lake Mary in Kenosha County, Wisconsin — 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 Mary
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Follow Lake Mary’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Lake Mary
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: Improving
Based on 5 years of monitoring (2021–2025).
Water clarity
Improving5 years
Phosphorus
Improving-1.23 µg/L/yr5 years
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Lake Mary under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 2 facilities have a reported Clean Water Act violation in the past three years.
- Twin Lakes Wastewater Treatment FacTwin Lakes · 1.4 mi away · NPDES WI0021695MajorRecent violation
- Richmond Stp, Village OfRichmond · 4 mi away · NPDES IL0026093Recent violation
- Silver Lake VillageSilver Lake · 1.4 mi away · NPDES WI0020851
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Kenosha County
Frequently asked questions about Lake Mary
Where is Lake Mary?
- Lake Mary is a lake in Kenosha County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Lake Mary?
- Lake Mary in Kenosha County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 6.4 ft visibility. Phosphorus: 15.5 µg/L. Maximum depth: 33 ft. Surface area: 327 acres.
Is Lake Mary safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lake Mary?
- Lake Mary has a maximum depth of 33 feet. The lake covers 327 acres.
What fish are in Lake Mary?
- Fish species found in Lake Mary include Panfish, Largemouth Bass, Northern Pike, Walleye. Lake Mary is located in Kenosha County, Wisconsin.
What did the DNR fisheries survey find at Lake Mary?
- Wisconsin DNR lists Panfish as common on Lake Mary. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lake Mary’s water-quality measurements separately, and the water-quality trend over 5 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Lake Mary?
- Lake Mary has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lance Memorial Park. Public access is listed as yes.
Can I fish at Lake Mary?
- Lake Mary 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 Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Explore Lake Mary across LakeQuality
Depth, room, public access, and the state wake-sport rules
Fish species and the cleanest lakes across Wisconsin
Fish species and best lakes in Kenosha County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its readings
Wisconsin's cleanest lakes, ranked on agency measurements
More lakes in Wisconsin
State Parks Near Lake Mary
Other Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
41 measurements from 1 monitoring station, 2021–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX41 samples · 2021–2026
Analytical methods
- Phosphorus by Colorimetry
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory