Lower Nemahbin Lake

Waukesha County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)239
Maximum Depth (ft)36
Mean Depth (ft)
Shoreline (miles)
Bottom Composition10% sand, 30% gravel, 0% rock, 60% muck
Water Clarity — Secchi Depth (ft)
Trophic Status
Drainage BasinDRAINAGE
Lake Classlake
Public Access
Township
GPS Coordinates43.04800° N, 88.43440° W
WBIC (DNR ID)827000

Fish Species

5 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Largemouth BassCommon
Northern PikePresent
PanfishPresent
Smallmouth BassPresent
WalleyePresent

Boat Landings

2 landings

NameTypeRampTrailersFee
Boat Landing 1Public
Boat Landing 2Public

Invasive Species

Invasive species have been documented in or near this lake. Please clean, drain, and dry all watercraft and equipment before leaving to prevent spread.

SpeciesStatusFirst Detected
Chinese Mystery SnailConfirmed
Curly-Leaf PondweedConfirmed
Eurasian Water-MilfoilConfirmed
Hybrid Eurasian / Northern Water-MilfoilConfirmed
Ornamental water lilies (non-native Nymphaea sp.)Confirmed
Purple LoosestrifeConfirmed
Spiny NaiadConfirmed
Starry StonewortConfirmed
Zebra MusselConfirmed

Data sourced from Wisconsin DNR lake surveys. Last scraped: 3/24/2026.

Lower Nemahbin Lake — Facts & Figures | Stay Northern