Update

Update, open grate area closed off by equipment. Follow camper signs. You will now stop at concrete barriers covered in white tarps on left to dump. Note you will need long hose to reach. Still open 365 days a year.

Free Dump

Open grate to dump in. Mast Rd to water treatment plant, left then first right in front of office to end of road then left then right to open pit. There are small printed signs in sheet savers so not easy to see. FREE AND EASY. Thank you Merrimac Wastewater.

Open 365 Days A Year: Free Dumping

Called ahead and spoke with Becky--- She was great, told me the details and allowed their hours are 0700-1430, 365 days a year with no fee to dump!