Fluvial Carbon Removal: CarbonRun Eyes Quebec Waterway for Sequestration

CarbonRun is advancing a carbon sequestration initiative centered on the Saint-Maurice River in Quebec, marking an emerging approach to engineered carbon removal that relies on aquatic environments rather than terrestrial or subsurface infrastructure. The proposed methodology involves introducing powdered limestone into the waterway at a proposed scale of up to 45,000 tonnes annually, a deployment strategy that differs significantly from established direct air capture facilities or geological storage approaches.

The limestone-based intervention operates on established geochemical principles whereby alkaline materials interact with water to influence carbonate chemistry and carbon cycling. By distributing powdered limestone through a major river system, the approach attempts to leverage natural hydrological flows to achieve sequestration objectives across a distributed geography. This model presents potential cost advantages relative to point-source capture infrastructure, though fluvial-based removal strategies remain subject to limited operational precedent and regulatory scrutiny within North American carbon markets.

The Quebec location provides jurisdiction-specific relevance given regional climate commitments and the province's established credibility in carbon market infrastructure. However, aquatic-based carbon removal projects introduce environmental monitoring requirements and stakeholder consultation considerations that differ from conventional CDR methodologies. As fluvial sequestration remains largely experimental, CarbonRun's initiative will likely inform regulatory frameworks governing nature-based and engineered removal strategies in Canadian jurisdictions.