Boat Harbour Cleanup Stalled by Legal Battle Over Toxic Sludge Disposal
Four years after the initial promise, the environmental remediation of Boat Harbour in Nova Scotia remains stalled due to a legal dispute between the Pictou Landing First Nation and Build Nova Scotia. The conflict centers on whether approximately 1 million cubic metres of toxic sludge can be stored onsite or must be moved offsite, with costs rising from $230 million to $425 million.
Four years after the largest environmental remediation project in a generation was supposed to start, Boat Harbour in Pictou County, Nova Scotia, has not been touched. The cleanup remains stalled due to an ongoing legal dispute between the Pictou Landing First Nation (PLFN) and Build Nova Scotia regarding the disposal of toxic sludge.
The core of the conflict is whether the estimated 1.02 million cubic metres of toxic sludge can be stored onsite or must be moved further away from the community. Lawyers representing the provincial government, the federal government, and the PLFN are scheduled to face off in Federal Court in Halifax this December. The hearing will review the federal environmental approval, which was challenged by the First Nation following a decision by the Impact Assessment Agency of Canada in January 2025.
Build Nova Scotia’s proposed plan involves digging up an existing containment cell adjacent to the plant, improving its liner, and piling new sediment on top to create a 24-metre hill before removing the dam. However, the existing containment cell has a capacity of 220,000 cubic metres and already contains 180,000 cubic metres of sediment. The province argues that moving the sludge is not technically or financially feasible. In contrast, the PLFN demands that the waste be moved further from their community, citing historic trauma and a lack of sincere consultation.
The financial stakes have grown significantly. The cost of the cleanup has increased from an initial estimate of $230 million to $425 million. If the court rules that the sludge must be moved offsite, an additional $150 million is projected to be required.
Boat Harbour was used as an effluent treatment facility for Northern Pulp from 1967 until the mill's permanent closure in January 2020. Tensions escalated in 2014 when a pipe rupture spilled hundreds of thousands of litres of untreated effluent into a wetland, leading to a blockade by Chief Andrea Paul and members of the PLFN. Following this incident, the province passed the Boat Harbour Act, preventing the mill from using the facility and contributing to its eventual shutdown.
In search of an alternative, the PLFN purchased a 29.14-hectare land parcel approximately seven kilometres west of New Glasgow. While sources report conflicting distances regarding the site's proximity to Boat Harbour, the purchase represents a potential solution for waste disposal if onsite storage is deemed unacceptable. The upcoming Federal Court hearing, scheduled to last two-and-a-half days, will determine the future of the remediation effort and the fate of the tidal estuary ecosystem.