City of Delafield issued the following announcement on October 5.
The Delafield-Hartland Wastewater Treatment Plant operates an RV dump site located at 416 Butler Drive, Delafield.
The site is open all year long, Monday through Friday from 7:00 am to 3:00 pm. If you would like to use the site, stop at the main office building to pay the $5.00 dump station user fee and staff will escort you to the RV dump site.
Original source can be found here.