Spring Lake
Spring Lake in Waukesha County, Wisconsin has a water quality grade of B (Good). Phosphorus: 12.2 µg/L. Maximum depth: 22 ft. Surface area: 105 acres.
Wisconsin DNR lists Panfish as common on Spring Lake. DNR survey details →
- Max depth
- 22 ft
- Area
- 105 acres
- Type
- Mesotrophic
- Trend
- ↓ Declining
- Public access
- Yes
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Spring Lake is a 105-acre mesotrophic lake in Waukesha County, Wisconsin with a maximum depth of 22 feet. Water quality is graded B based on 1 sampling years through 2021. Overall water quality is declining over recent sampling years. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Smallmouth Bass. Public access is available. Compared to the 34 other monitored lakes in Waukesha County, Spring Lake ranks #23 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2021-09-06. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLimited data
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)
No clarity data. Phosphorus level: 12.2 µg/L. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 12.2 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Spring Lake
Compare lakeside cabins, hotels, and vacation rentals near Spring Lake in Waukesha 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 Spring Lake
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Wisconsin DNR lists Panfish as common on Spring Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Spring Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 2 years of monitoring is declining. 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 2021).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 22 ft |
| Surface Area | 105 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Spring 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.
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +0.9 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Spring Lake is a man-made reservoir impounded by the Willow Springs Lake (completed 1966), built primarily for recreation on the SPRING BROOK; gravity-type dam, 20 ft tall and 1,940 ft long.
- Surface area
- 60 ac
- Normal storage
- 220 ac-ft
- Max storage
- 590 ac-ft
- Drainage area
- 3.1 sq mi
- Hazard class
- Low
- Owner
- SPRING BROOK WATERSHED LAKE MANAGEMENT DIST
Source: USACE National Inventory of Dams, NID ID WI00444 · Operator website · Matched by proximity (0.97 km)
County Ranking
Ranked #23 of 35 lakes in Waukesha County
Nearby Lakes With Higher Grades
Spring 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.
Nearby Lakes in Waukesha County
Frequently asked questions about Spring Lake
Where is Spring Lake?
- Spring Lake is a lake in Waukesha County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Spring Lake?
- Spring Lake in Waukesha County, Wisconsin has a water quality grade of B (Good). Phosphorus: 12.2 µg/L. Maximum depth: 22 ft. Surface area: 105 acres.
Is Spring Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Spring Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Spring Lake?
- Spring Lake has a maximum depth of 22 feet. The lake covers 105 acres.
What fish are in Spring Lake?
- Fish species found in Spring Lake include Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike. Spring Lake is located in Waukesha County, Wisconsin.
What did the DNR fisheries survey find at Spring Lake?
- Wisconsin DNR lists Panfish as common on Spring Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Spring Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 2 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Spring Lake across LakeQuality
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Moderate nutrients, good water quality
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Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
5 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX5 samples · 2020–2021
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