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Welcome to Delavan Lake Sanitary District Delavan Lake Sanitary District....Serving the Residents of the Delavan Lake Area

The Delavan Lake Sanitary District was created in 1969 to operate and maintain a wastewater collection system serving properties adjacent to and surrounding Delavan Lake. Since 1997 the District has been responsible for the Aquatic Plant Management Program for Delavan Lake as well as various lake monitoring projects and studies in cooperation with Wisconsin DNR and USGS. Since 1995 DLSD has assisted the Town of Delavan in the monitoring lake levels and operation of the Delavan Lake (Borg) Dam facilities.

Recent News

COUNTY HWY O SEWER & FORCE MAIN PROJECT

5/25/2023

Delavan Lake Sanitary's portion of the construction activities is complete.

5/4/23

County O from North Shore Drive to Highland Drive is closed through May 10, 2023 for sewer construction.

The west enterence of Viewcrest Drive by County Hwy O will be closed on 5/2/23 for the day starting at...

COLUMNARIS BACTERIAL INFECTION IS CAUSE OF FISH KILL

5/9/2023

It's very common during the spring and early summer to receive phone calls from our Delavan Lake residents alerting us that they have seen a big fish die off. Very often these spring die off events are the result of a Columnaris bacterial infection. Columnaris bacteria thrives in warm...

NOTICE OF APPLICATION FOR AQUATIC PLANT MANAGEMENT PERMIT

3/7/2023

The Delavan Lake Sanitary District intends to apply for permits from the Wisconsin Department of Natural Resources to treat approximately 165 acres of Delavan Lake with aquatic pesticides to control algae and/or aquatic plants. The proposed treatments would occur between April 15 and...

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