Eagle Spring Lake
Eagle Spring Lake in Waukesha County, Wisconsin has a water quality grade of B (Good). Water clarity: 4.5 ft visibility. Phosphorus: 17.9 µg/L. Maximum depth: 8 ft. Surface area: 279 acres.
Wisconsin DNR lists Panfish as common on Eagle Spring Lake. DNR survey details →
- Clarity
- 4.5 ft
- Typical in August
- 75°F
- Max depth
- 8 ft
- Area
- 279 acres
- Type
- Eutrophic
- Trend
- ↑ Improving
- Public access
- Yes
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Eagle Spring Lake is a 279-acre productive, nutrient-rich eutrophic lake in Waukesha County, Wisconsin with a maximum depth of 8 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 34 other monitored lakes in Waukesha County, Eagle Spring Lake ranks #18 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-29. Grade methodology: LakeQuality 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)
Murky, only visible to about 4.5 ft. Phosphorus level: 17.9 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.5 ft | Not graded |
| Phosphorus | 17.9 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Eagle Spring Lake
Compare lakeside cabins, hotels, and vacation rentals near Eagle 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 Eagle Spring Lake
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Water Temperature
Eagle Spring Lake typically sits around 75°F at the surface in August. Summer average is about 80°F. Usually warmest in Jul (about 83°F) and coldest in May (about 66°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 16 field readings (2025–2026) via the EPA Water Quality Portal. See the full Eagle Spring Lake water temperature breakdown →
Blue-Green Algae (Cyanobacteria)
There’s no recent EPA CyAN cyanobacteria estimate for Eagle Spring Lake — clouds, ice, or an off-season gap in coverage. The most recent reading was low (19,588 cells/mL) on March 1, 2025.
Blue-green algae can appear and clear within days, so check your state’s current advisory before swimming. EPA CyAN ↗
Wisconsin DNR lists Panfish as common on Eagle Spring Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Eagle Spring Lake B 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 1991. 3 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 8 ft |
| Surface Area | 279 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Eagle Spring 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 Eagle 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: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.093 m/yr | 6 |
| Phosphorus | ↑ Improving | -0.75 µg/L/yr | 6 |
Reservoir Info (USACE NID)
Eagle Spring Lake is a man-made reservoir impounded by the Wambold (completed 1836), built primarily for recreation on the MUKWONAGO R; gravity-type dam, 12 ft tall and 301 ft long.
- Surface area
- 311 ac
- Normal storage
- 1,127 ac-ft
- Max storage
- 1,540 ac-ft
- Drainage area
- 22 sq mi
- Hazard class
- Significant
- Owner
- Eagle Spring Lake Management District;Wruck, Steven
Source: USACE National Inventory of Dams, NID ID WI00331 · Operator website
County Ranking
Ranked #18 of 35 lakes in Waukesha County
Nearby Lakes With Higher Grades
Eagle 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.
See full comparison →Nearby Lakes in Waukesha County
Frequently asked questions about Eagle Spring Lake
Where is Eagle Spring Lake?
- Eagle 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 Eagle Spring Lake?
- Eagle Spring Lake in Waukesha County, Wisconsin has a water quality grade of B (Good). Water clarity: 4.5 ft visibility. Phosphorus: 17.9 µg/L. Maximum depth: 8 ft. Surface area: 279 acres.
Is Eagle Spring Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Eagle Spring Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Eagle Spring Lake?
- Eagle Spring Lake typically sits around 75°F at the surface in August, from 16 EPA Water Quality Portal field readings (2025–2026). That is a typical value for the month, not a live reading.
How deep is Eagle Spring Lake?
- Eagle Spring Lake has a maximum depth of 8 feet. The lake covers 279 acres.
What fish are in Eagle Spring Lake?
- Fish species found in Eagle Spring Lake include Panfish, Largemouth Bass, Northern Pike. Eagle Spring Lake is located in Waukesha County, Wisconsin.
What did the DNR fisheries survey find at Eagle Spring Lake?
- Wisconsin DNR lists Panfish as common on Eagle Spring Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Eagle Spring Lake B 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.
Does Eagle Spring Lake have blue-green algae?
- There is no recent EPA CyAN cyanobacteria estimate for Eagle Spring Lake (clouds, ice, or an off-season gap). The most recent reading was low (19,588 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.
Are there boat ramps on Eagle Spring Lake?
- Eagle Spring Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Eagle Spring Lake. Public access is listed as yes.
Explore Eagle Spring Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
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Species activity outlook by water temperature and season
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High nutrients, frequent algae, reduced clarity
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Where this data comes from
46 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_WQX46 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