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

View All


(8/19/2019) Purple Loosestrife now blooming near Delavan Lake!  Click on the the link and image attached to learn more.

Aquatic Plant Harvesting has begun

(6/17/2019) The cooler temperatures have kept the water approximately 5 degrees cooler than normal for this time of year.  Weed growth has been slow as a result of these cooler temperatures.  Unfortunately, algae blooms have begun early due to the excess...

DLSD endorses Service Line Warranties of America

(6/1/2019) Delavan Lake Sanitary District has endorsed Service Line Warranties of America (SLWA) - a premier provider of home emergency repair programs to homeowners nationwide - to offer Exterior Sewer/Septic Line Coverage to Delavan Lake homeowners.  Please vis...