East End Wastewater Treatment Plant Tour

Tour Maine's largest wastewater plant and discover wastewater treatment's vital role in preserving our waters. We invite you to take a tour of the largest wastewater treatment facility in Maine and learn more about the important role wastewater treatment plays in preserving our waterways. Please note that tours can take up to an hour and a half and involve walking outside and climbing stairs. Tour the largest wastewater treatment plant in Maine The Portland Water District operates four wastewater treatment plants in Greater Portland and oversees two of the largest industrial pretreatment programs in the state. Over decades, millions have been invested to modernize plants and further improve processes to protect Casco Bay.