Where is Phantom Lake?

Phantom Lake is a lake in Waukesha County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.

How deep is Phantom Lake?

Phantom Lake has a maximum depth of 29 feet and an average depth of 11 feet. The lake covers 110 acres.

Are there campgrounds on Phantom Lake?

Phantom Lake has 1 public campground from USGS The National Map within 5 km, including Mukwonago Park Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.

Phantom Lake

Waukesha County, Wisconsin110 acresView map Directions

No nutrient or algae sampling on record from Wisconsin DNR for this lake.

Max depth

29 ft

Bathymetric survey

Area

110 acres

Surface area

Shoreline

2.2 mi

Measured length

Impaired · Nutrients (phosphorus, nitrogen)
29 ft max depth

See the measurements Directions Where to stay

Phantom Lake in Waukesha County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 29 ft. Surface area: 110 acres.

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Phantom Lake is a 110-acre lake in Waukesha County, Wisconsin with a maximum depth of 29 feet (11-foot average).

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water. Methodology: how these readings are compared.

What Phantom Lake is good for

From access and monitoring records, not editorial picks.

Camping1 public campground nearby

Swimming conditions

No reading

Recreation use not supported

Nutrient and algae readings are not a swimming clearance. Phantom Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.

Whether Phantom Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Phantom Lake

These are the measurements Wisconsin DNR publishes for Phantom Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data. TSI undefined.

Ask about Phantom Lake

Answers come straight from the public measurements and survey records on this page.

Lake Details

Max depth

29 ft

Average depth

11 ft

Surface area

110 acres

Shoreline

2.2 mi

Recreation & Access

Campgrounds

Public campgrounds near Phantom Lake

Mukwonago Park Campground3.0 km

Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes

Stays via Stay22

Stays near Phantom Lake

Compare lakeside cabins, hotels, and vacation rentals near Phantom 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 Phantom Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

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Fishing Phantom Lake

→ Phantom Lake fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Phantom Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Nutrients (phosphorus, nitrogen)

Designated uses not supporting: Recreation.

Source: EPA ATTAINS assessment unit WI10000590 · Official waterbody report

Nearby Lakes in Waukesha County

Lower Phantom Lake6.7 ft clear · Mesotrophic0.7 miView →Rainbow Springs Lake3.5 miView →Spring LakeMesotrophic—View →Eagle Spring Lake4.5 ft clear · Eutrophic4.5 miView →Saylesville Millpond—View →Ottawa Lake13 ft clear · Mesotrophic—View →

Frequently asked questions about Phantom Lake

Where is Phantom Lake?: Phantom Lake is a lake in Waukesha County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Phantom Lake?: Phantom Lake in Waukesha County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 29 ft. Surface area: 110 acres.
Is Phantom Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Phantom Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Phantom Lake?: Phantom Lake has a maximum depth of 29 feet and an average depth of 11 feet. The lake covers 110 acres.
Are there campgrounds on Phantom Lake?: Phantom Lake has 1 public campground from USGS The National Map within 5 km, including Mukwonago Park Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.