Data shows many Halifax lakes have high salt levels

Halifax is taking action to address the issue of high salt levels in the region’s waterways, following the release of concerning data showing salinization in several freshwater lakes. The recent results from the LakeWatchers Program revealed that average deepwater levels in 10 lakes exceeded national guidelines for chloride, with lakes Lovett, Banook, and Micmac being the most affected.

Lovett Lake, in particular, had chloride levels nearly double the recommended limit, posing a threat to the aquatic life in these bodies of water. Excessive salt can harm plants and fish, as well as disrupt the natural mixing cycle of the lakes. This disruption can lead to reduced oxygen levels and increased nutrients, resulting in the growth of algae and weeds, as seen in Lake Banook.

Chris Kennedy, the municipal co-ordinator for the monitoring program, highlighted the impact of urban development on the salt levels in lakes. Stormwater carrying road salt and brine directly flows into lakes, bypassing natural filtration processes. While Halifax has implemented some measures to reduce salt usage, such as using liquid brine on roads, more action is needed.

In response to the findings, Halifax council has requested a review of the municipality’s salt management plan and proposed changes to stormwater policies. These changes could include setting back stormwater discharge locations from water bodies and establishing naturalized shorelines with more vegetation to absorb salt.

Mayor Andy Fillmore will also be reaching out to the provincial government to advocate for standards on stormwater management. Currently, Halifax Water is limited in making infrastructure upgrades to reduce salt levels due to regulatory constraints. The province has outlined plans to set water quality standards by 2026 under the Environmental Goals and Climate Change Reduction Act of 2021, but progress has been slow.

It is crucial for the provincial government to prioritize setting water quality standards to guide activities affecting water quality and allow for the necessary upgrades to stormwater systems. By working together at the municipal and provincial levels, Halifax can effectively address the issue of high salt levels in its waterways and protect the health of its freshwater ecosystems.