Well filling and sealing
Abandoned or unused wells pose a great threat to the safety and quality of groundwater drinking water supplies. An unused well provides a direct path for contaminants and pollutants to the underground aquifers that supply working wells.
Wells must be properly filled when they are removed from service. If your property is served by a municipal drinking water system, a municipal well filling and sealing ordinance may also require you to obtain a permit or permanently fill and seal any private wells on your property. Drillholes and exploratory boreholes must also be properly filled and sealed when they are no longer in use.
As of June 1, 2008, only licensed well drillers and pump installers can fill and seal wells under Wisconsin Law.
A well is considered to be permanently abandoned when it has been completely filled and sealed by a licensed well driller or pump installer using materials and methods as prescribed in section NR 812.26, Wisconsin Administrative Code. This generally means that the pump and any piping inside of the well casing have been removed and the well has been filled from bottom to top with proper filling materials, such as cement grout, concrete grout, concrete, a clay/sand slurry mix or, in some cases, bentonite chips.
- Answers to your Questions on Well Filling and Sealing
- Verification process for wells formerly filled and sealed: Verification Guidance
- Search for completed Well Filling and Sealing Reports
- Submit an electronic Well Filling and Sealing Report
- First time user? Create a WAMS User ID through the DNR Switchboard.
- Note: All WAMs IDs must belong to an individual. They cannot belong to a business and should not be in the business’ name.
- Get help using Switchboard or setting up your WAMS ID.
- Note: Electronic submittal required beginning on July 1, 2016.
- Submit a paper Well / Drillhole / Borehole Filling & Sealing Form 3300-005.
- State funds for replacing contaminated private wells
- Grants available for well filling and sealing
- Chapter NR 812, Wisconsin Administrative Code
- Contact information
- For more information regarding well filling and sealing, contact:
- Sandy Hershberger
Private Water Section
- If your question pertains to well abandonment grants, contact:
- Randell Clark
Private Water Section