Lilly Lake
Lilly Lake in Kenosha County, Wisconsin has a water quality grade of B (Good). Water clarity: 13.5 ft visibility. Phosphorus: 13.6 µg/L. Maximum depth: 22 ft. Surface area: 85 acres.
- Clarity
- 13.5 ft
- Typical in August
- 80°F
- Max depth
- 22 ft
- Area
- 85 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Kenosha County
Lilly Lake is a 85-acre mesotrophic lake in Kenosha County, Wisconsin with a maximum depth of 22 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. The lake supports 3 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, Lilly Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-07-12. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Good clarity, visible to about 13.5 ft. Phosphorus level: 13.6 µg/L. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.5 ft | Not graded |
| Phosphorus | 13.6 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lilly Lake
Compare lakeside cabins, hotels, and vacation rentals near Lilly Lake 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 Lilly Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Water Temperature
Lilly Lake typically sits around 80°F at the surface in August. Summer average is about 78°F. Usually warmest in Jul (about 80°F) and coldest in Mar (about 45°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 56 field readings (2024–2026) via the EPA Water Quality Portal. See the full Lilly Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 22 ft |
| Surface Area | 85 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Lily LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Lilly Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2002. 3 stations on file (most recent sample 2026).
Fish Species (DNR-rated)
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.379 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.59 µg/L/yr | 7 |
County Ranking
Ranked #3 of 8 lakes in Kenosha County
Nearby Lakes With Higher Grades
Lilly Lake holds Grade B. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Kenosha County
Frequently asked questions about Lilly Lake
What is the water quality grade for Lilly Lake?
- Lilly Lake in Kenosha County, Wisconsin has a water quality grade of B (Good). Water clarity: 13.5 ft visibility. Phosphorus: 13.6 µg/L. Maximum depth: 22 ft. Surface area: 85 acres.
Is Lilly Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Lilly Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Lilly Lake?
- Lilly Lake typically sits around 80°F at the surface in August, from 56 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Lilly Lake?
- Lilly Lake has a maximum depth of 22 feet. The lake covers 85 acres.
What fish are in Lilly Lake?
- Fish species found in Lilly Lake include Panfish, Largemouth Bass, Northern Pike. Lilly Lake is located in Kenosha County, Wisconsin.
Are there boat ramps on Lilly Lake?
- Lilly Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lily Lake. Public access is listed as yes.
Explore Lilly Lake across LakeGrade
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Fish species and best lakes in Kenosha County
Species activity outlook by water temperature and season
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Moderate nutrients, good water quality
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State Parks Near Lilly Lake
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
97 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX97 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
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
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