Lake Ontario Nearshore Waters Assessment with Cumulative Stress Analysis

Environment and Climate Change Canada's dataset supports a cumulative effects assessment for Lake Ontario, the Niagara River, and the St. Lawrence River nearshore waters under the Great Lakes Water Quality Agreement. Assessment data is presented within a 30-metre depth zone along the coast, integrating measures across four categories: Coastal Processes, Contaminants, Nuisance Algae, and Human Use. The data was last updated on 2026-07-07.

Use Cases

• Model cumulative environmental stress on nearshore waters based on integrated stressor categories.
• Analyze shoreline hardening and tributary connectivity impacts based on Coastal Processes data.
• Assess water and sediment quality trends based on Contaminants in Water & Sediment measures.
• Monitor beach postings and fish consumption advisories based on Human Use indicators.
• Classify nearshore regional units based on physical processes and lake characteristics.

Strengths

• Data is structured for a formal three-phased assessment approach: classification, stress assessment, and integration of high ecological value areas.
• Assessment integrates four specific measure categories: Coastal Processes, Contaminants, Nuisance Algae, and Human Use.
• Spatial analysis is focused on a defined 30-metre depth zone along the coast.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is provided in HTML format, which may require extraction and transformation for analysis.

Provenance

Source

Environment and Climate Change Canada

Collection Method

Data integrated for a cumulative effects assessment under the Great Lakes Water Quality Agreement.

Freshness

Last updated 2026-07-07 15:21:31.802207; freshness should be verified.

Geography

Lake Ontario, Niagara River, and St. Lawrence River nearshore waters.