Pine Lake
Pine Lake in Waukesha County, Wisconsin has a water quality grade of B (Good). Water clarity: 25 ft visibility. Phosphorus: 12.2 µg/L. Maximum depth: 85 ft. Surface area: 711 acres.
Wisconsin DNR lists Largemouth Bass as common on Pine Lake. DNR survey details →
- Clarity
- 25 ft
- Max depth
- 85 ft
- Area
- 711 acres
- Type
- Oligotrophic
- Trend
- → Stable
- Public access
- Yes
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Pine Lake is a 711-acre cold, clear oligotrophic lake in Waukesha County, Wisconsin with a maximum depth of 85 feet. Water quality is graded B based on 1 sampling years through 2026. Water clarity is improving over recent sampling years. The lake supports 5 documented fish species including Panfish, Largemouth Bass, and Smallmouth Bass. Public access is available. Compared to the 34 other monitored lakes in Waukesha County, Pine Lake ranks #26 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-09. 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)
Crystal clear, you can see 25 ft down. Phosphorus level: 12.2 µg/L. Trophic State Index: 35.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 25 ft | Not graded |
| Phosphorus | 12.2 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 35 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Pine Lake
Compare lakeside cabins, hotels, and vacation rentals near Pine 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.
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Wisconsin DNR lists Largemouth Bass as common on Pine Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Pine Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is stable. 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 2008. 3 stations on file (most recent sample 2026).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 85 ft |
| Surface Area | 711 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 Pine 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: → Stable
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +3.473 m/yr | 7 |
| Phosphorus | ↓ Declining | +1.03 µg/L/yr | 6 |
County Ranking
Ranked #26 of 35 lakes in Waukesha County
Nearby Lakes in Waukesha County
Frequently asked questions about Pine Lake
Where is Pine Lake?
- Pine 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 Pine Lake?
- Pine Lake in Waukesha County, Wisconsin has a water quality grade of B (Good). Water clarity: 25 ft visibility. Phosphorus: 12.2 µg/L. Maximum depth: 85 ft. Surface area: 711 acres.
Is Pine Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Pine Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Pine Lake?
- Pine Lake has a maximum depth of 85 feet. The lake covers 711 acres.
What fish are in Pine Lake?
- Fish species found in Pine Lake include Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Pine Lake is located in Waukesha County, Wisconsin.
What did the DNR fisheries survey find at Pine Lake?
- Wisconsin DNR lists Largemouth Bass as common on Pine Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Pine Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Pine Lake across LakeQuality
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Species activity outlook by water temperature and season
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Low nutrients, clear water, excellent for swimming
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Where this data comes from
28 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_WQX28 samples · 2021–2026
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