In 2016, North Grenville began the process of exploring a major expansion of its 30-year-old sewage treatment plant. In 2019, Council authorized the preliminary engineering and design work for the expansion, recognizing the time intensive studies and other requirements from the Ministry of Environment needed to proceed. In 2020, Council adopted a Capacity Allocation Bylaw which placed significant restrictions on access to remaining capacity at the existing plant until such time that there was an expansion.

The expansion of the plant will ensure that the Municipality can continue to provide essential services for its residents and businesses - as well as to welcome new commercial, residential, industrial, and institutional developments. This includes but is not limited to new schools, a potential hotel, and a prospective provincial correctional facility.