Strontium-90 Activity in Canadian Milk Samples 1984-1993

The Canadian Radiological Monitoring Network provides 90Sr activity concentrations in milk samples from across Canada, measured in becquerels per litre (Bq/L). Data was collected from 20 locations from 1984 to 1993, after which routine analysis continued only in Ottawa. This dataset is used for environmental radioactivity assessment, tracking the decline of fallout from nuclear weapons testing.

Use Cases

• Analyze the decline in 90Sr activity concentration (Bq/L) over time to assess the long-term environmental impact of historical nuclear events.
• Compare 90Sr levels across the 20 different sampling locations to identify regional variations in environmental radioactivity.
• Model soil-to-milk uptake pathways for radionuclides using the 90Sr concentration data as a key indicator of environmental contamination.

Strengths

• Provides data from 20 distinct monitoring locations across Canada, offering geographic breadth.
• Covers a defined 10-year time period from 1984 to 1993, with extended data for Ottawa.
• Focuses on a specific radionuclide (Strontium-90) with known health implications, making the data highly targeted.

Limitations

• The dataset's primary temporal coverage ends in 1993 for most locations, making it historical rather than current.
• Sample size and frequency per location are not specified, limiting statistical analysis of trends.
• The specific data structure and available columns (e.g., sampling dates, station IDs) are not detailed in the input.

Provenance

Source

Health Canada's Canadian Radiological Monitoring Network (CRMN), published by Natural Resources Canada.

Collection Method

Laboratory analysis of milk samples collected from monitoring stations.

Time Range

1984 to 1993 for 20 locations, with post-1993 data for Ottawa.

Freshness

Data was last updated on the platform in March 2026, but the underlying measurements are historical.

Geography

Various locations across Canada.