Mississippi Mills plans major upgrades to wastewater infrastructure

Big changes are in store for wastewater management in Mississippi Mills, as the municipality kicks off a comprehensive environmental assessment for significant upgrades to its wastewater infrastructure.

The proposed expansion of the Gemmill’s Bay Wastewater Pumping Station (GBPS) and the Mississippi Mills Wastewater Treatment Plant (WWTP) aims to meet the demands of an ever-growing Almonte. According to a press release from Mississippi Mills, all wastewater from the community currently flows through GBPS before being treated at the WWTP, but both facilities are quickly approaching capacity.

Now, with new developments expected over the next 25 years, Mississippi Mills is taking a proactive approach to ensuring its infrastructure is ready.

The project builds on the findings of a 2024 master plan that sought out way to explore modern, environmentally responsible solutions for increasing capacity. The municipality must undergo a Class Environmental Assessment, required under Ontario law, to evaluate potential designs while minimizing impacts to the environment, community, and local economy.

“This is about planning for the future of Mississippi Mills,” said municipal officials in a press release on Friday, May 23, 2025. “It’s not just an engineering project—it’s an investment in public health, sustainability, and long-term growth.”

Public input will be a key part of the process, and residents are encouraged to attend the first Public Information Centre (PIC) on Wednesday, June 4, 2025, from 2:00-8:00pm in the Auditorium of the Almonte Old Town Hall. Residents can ask questions, learn more about the proposed developments and share their views.

Three separate PICS will take place throughout the study, and updates will be shared on the municipality’s website, Facebook, and Instagram.