St. Lawrence River Basin Water Quality Data for 15+ Years

Over 40 monitoring sites in the Saint Lawrence River basin provide long-term freshwater quality data for nutrients, metals, and other variables. Environment and Climate Change Canada, along with provincial partners, collected this data over 15 years or more to assess status, trends, and the effectiveness of regulatory actions. Data from provincial sites is available through Quebec's Ministry of Sustainable Development, Environment and the Fight against Climate Change.

Use Cases

• Modeling long-term trends in nutrient concentrations based on the 15+ year monitoring period.
• Assessing the effectiveness of remedial measures and regulatory decisions based on the stated program objectives.
• Detecting emerging water quality issues for metals and major ions based on the monitored variables.
• Establishing or validating regional water quality guidelines based on the extensive monitoring data.

Strengths

• Data spans over 15 years, enabling longitudinal trend analysis.
• Covers more than 40 monitoring sites across the St. Lawrence River basin.
• Includes multiple physical-chemical variables such as nutrients, metals, and major ions.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Environment and Climate Change Canada (ECCC), the Canada-Quebec Water Quality Monitoring Agreement, and the St. Lawrence Action Plan.

Collection Method

Long-term freshwater quality monitoring conducted at fixed sites.

Time Range

15 years or longer.

Freshness

Last updated 2026-05-07 19:31:49.246059; freshness should be verified.

Geography

Saint Lawrence River basin, Canada.