Geneva Lake Environmental Agency
The Geneva Lake Environmental Agency is determined to maintain the environment and resources of Geneva Lake by protecting, preserving, and enhancing lake and watershed quality through monitoring, data collection, and education.
WE MOVED!!
Our new address is:
105 N Elkhorn Rd. Williams Bay, WI 53191
Our new office is conveniently situated right next to Dip in the Bay in Williams Bay. We are eager to make use of our upgraded educational spaces. Feel free to drop by as we are still settling into our new office.
We appreciate your patience during this transition. Thank you!
GLEA has officially began its weekly public beach
E. coli testing.
Weekly E. coli test results will be posted on Instagram and Facebook. Check below for the most recent results!
2025 SUMMER PUBLIC BEACH TESTING
All beaches are safe in our latest round of beach testing. Stay safe on the water and have an amazing Memorial Day weekend!
2024 SUMMER STUDIES
Nearshore Fisheries Survey
GLEA will be conducting a fishery survey this summer to determine species diversity and species richness of the fishes in Geneva Lake. The last time a survey like this has been conducted was in 2023. The goal of this data is to determine the health of local fish populations and how they have been changing. Check here on our website at the end of summer to see what we find!
Aquatic Plant PI Survey
This summer GLEA will be conducting a survey on the species diversity and species richness aquatic plants lake-wide. This includes deep water and shallow water plants within the littoral zone. The goal of this survey is to determine the abundance of native and invasive plants. Check in at the end of summer here for the results!
Macroinvertebrate Survey
GLEA will be conducting a survey on the species diversity and species richness of small invertebrates within Geneva Lake. Benthic invertebrates are an essential part of the food web, they are prey for juvenile fish. The goal of this data is to determine how macroinvertebrate populations have been changing and if there are any new invasive invertebrates. Check in at the end of summer here for the results!
Enhanced Wake Study
This summer GLEA will be studying the effects of enhanced wakes on starry stonewort populations, water quality, and shoreline impacts. Our goal is to develop the ideal operation of wake boats to sustain Geneva Lake's ecosystem. We wish to retain the enjoyment wake boat recreation can bring while considering the health of Geneva Lake. Geneva Lake is one of the few lakes that can handle enhanced wake systems which is why it is important to preserve it. Check here to see updates throughout the summer!
Boat Count
GLEA conducted the annual boat count in August to assess boats docked and moored on Geneva Lake. Motorized boats, sailboats, personal watercraft, and non-motorized vessels, are all included. The GLEA spends a day on the water counting boats on the shore and collecting numbers from storage facilities and marinas. The "Data" tab has more information on comparative counts for past years.
2024 DNR Fishing Tournament and Game Fishery public meeting recording:
Passcode: EE3^S3!=
2023 SUMMER REPORTS
Nearshore Fisheries Survey
GLEA worked with retired DNR staff on conducting a Nearshore Fisheries Survey for the lake. This survey has been done 4 times on Geneva Lake, beginning in 1978 and the most recent one conducted in 2018. The report not only describes current fish populations, but also compares them to previous surveys as well.
A total of 18 sites were sampled to understand the nearshore fish population. Gar, darter species, bass, panfish (bluegill, sunfish, perch, rock bass), bullheads, and killifish, where among just some of the species found. Read the full report below!
Aquatic Plant PI Survey
GLEA worked with Southeastern Wisconsin Regional Planning Commission on our Annual Aquatic Plant PI Survey.
Through sampling a grid of points on the lake, we can document the overall plant diversity as well as locations of certain species. This survey also helps us monitor where starry stonewort is and how it spreads year to year. Look out for that report later this year!
Boat Count
GLEA conducted the annual boat count early August to assess boats docked and moored on Geneva Lake. Motorized boats, sailboats, personal watercraft, and non-motorized vessels, are all included. The GLEA spends a day on the water counting boats on the shore and collecting numbers from storage facilities and marinas. The "Data" tab has more information on comparative counts for past years.
Follow the link below to read the 2023 Boat Count assessment!
Check out new boat cleaning stations at Williams Bay, Lake Geneva, and Fontana launches!
Brought to you by the Geneva Lake Environmental Agency, Villages of Williams Bay and Fontana, the City of Lake Geneva, and WI DNR grant.
CD3 Roadside
Waterless Cleaning System
We encourage you to clean your boat when entering and exiting Geneva Lake to help us stop the spread of aquatic invasive species
A CLEAN BOAT MEANS CLEAN WATERS
Thank you to Ms. Garcia & Katrina, Elizabeth, Julia, and Chris for finding this excellent resource and sharing the importance of lake ecology!
STARRY STONEWORT UPDATE July 27, 2022.
We spent time at the starry stonewort colony site scuba diving to monitor populations. Starry stonewort is an invasive plant that was first seen in Geneva Lake in 2018. These plants are solely male and spread by releasing bulbils, that act as seeds, growing wherever they land. Movement such as hand-pulling is believed to actually stir up these seed-like bulbils and cause more damage by promoting spreading. Through routine dive checks on known population sites we are able to see how these plants are growing. While starry stonewort hasn't gone away, we haven't seen too much growth and believe our native species have been doing a good job at keeping this invasive plant at bay.
Diving with Linn Fire Department
Underwater photos of aquatic plants at a starry stonewort colony site
SWIMMERS ITCH
How to stay safe this summer
Swimmer's itch is caused by flatworm larvae that can unintentionally latch onto human skin when looking for a waterfowl host and cause irritation or itchiness. They like warm water at around 72°F. When your skin dries, the larvae will burrow into the skin and eventually die, but this typically results in some uncomfortable itchiness.
WAYS TO TREAT
Don't scratch! Use an antihistamine lotion. Swimmer's itch is rarely serious and will pass in a couple days.
CONTACT US
Tel. 262-245-4532
PO Box 914
105 N Elkhorn Rd.
Williams Bay, WI 53191
Our Office:
Located in the same building as Dip in the Bay, Ice Cream Shop.
105 N Elkhorn Rd., Williams Bay, WI 53191
Hours: Monday - Friday: 8:30 AM - 5 PM