Lake Lorraine
Lake Lorraine in Walworth County, Wisconsin has a water quality grade of C (Fair). Phosphorus: 48.9 µg/L. Maximum depth: 8 ft. Surface area: 155 acres.
Wisconsin DNR lists Panfish as present on Lake Lorraine. DNR survey details →
- Max depth
- 8 ft
- Area
- 155 acres
- Type
- Eutrophic
- Trend
- ↑ Improving
- Public access
- Yes
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Lake Lorraine is a 155-acre productive, nutrient-rich eutrophic lake in Walworth County, Wisconsin with a maximum depth of 8 feet. Water quality is graded C based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. The lake supports 2 documented fish species including Panfish and Largemouth Bass. Public access is available with 1 public boat landing. Compared to the 18 other monitored lakes in Walworth County, Lake Lorraine ranks #15 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-23. Grade methodology: LakeQuality methodology.
Watch Lake Lorraine water quality
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Swimming Safety
Grade onlyModerate
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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
No clarity data. Phosphorus level: 48.9 µg/L. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 48.9 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Lorraine
Compare lakeside cabins, hotels, and vacation rentals near Lake Lorraine in Walworth 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 Lorraine
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Wisconsin DNR lists Panfish as present on Lake Lorraine.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Lake Lorraine C from EPA Water Quality Portal chemistry, and the water-quality trend over 6 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. Monitored by volunteers since 1995. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 8 ft |
| Surface Area | 155 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Lorraine LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Lake Lorraine
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 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -7.19 µg/L/yr | 6 |
EPA Impairment Status
Lake Lorraine is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10001543 · Official waterbody report
County Ranking
Ranked #15 of 19 lakes in Walworth County
Nearby Lakes With Higher Grades
Lake Lorraine holds Grade C. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Walworth County
Frequently asked questions about Lake Lorraine
Where is Lake Lorraine?
- Lake Lorraine is a lake in Walworth County, Wisconsin. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Lorraine?
- Lake Lorraine in Walworth County, Wisconsin has a water quality grade of C (Fair). Phosphorus: 48.9 µg/L. Maximum depth: 8 ft. Surface area: 155 acres.
Is Lake Lorraine safe to swim in?
- Generally safe for swimming, moderate water quality. Lake Lorraine has a water quality grade of C (Fair). Always check local health department advisories before swimming.
How deep is Lake Lorraine?
- Lake Lorraine has a maximum depth of 8 feet. The lake covers 155 acres.
What fish are in Lake Lorraine?
- Fish species found in Lake Lorraine include Panfish, Largemouth Bass. Lake Lorraine is located in Walworth County, Wisconsin.
What did the DNR fisheries survey find at Lake Lorraine?
- Wisconsin DNR lists Panfish as present on Lake Lorraine. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Lake Lorraine C from EPA Water Quality Portal chemistry, and the water-quality trend over 6 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 Lorraine?
- Lake Lorraine has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lorraine Lake. Public access is listed as yes.
Explore Lake Lorraine across LakeQuality
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Fish species and best lakes in Walworth County
Species activity outlook by water temperature and season
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High nutrients, frequent algae, reduced clarity
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State Parks Near Lake Lorraine
Other Grade C Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Where this data comes from
15 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_WQX15 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
Impairment status from EPA ATTAINS 303(d) database
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