Ontario Municipal Drinking Water Quality Monitoring Data

The Drinking Water Surveillance Program provides water quality data from selected municipal drinking water systems in Ontario. This voluntary partnership program monitors inorganic, organic, and radiological parameters for scientific and research purposes. Data are published by individual years.

Use Cases

• Analyze trends in inorganic parameter concentrations across municipal systems over time.
• Compare levels of organic and radiological parameters between different water systems.
• Use annual water quality data to support scientific research on drinking water safety.

Strengths

• Data is provided by the Government of Ontario, an authoritative source.
• Program monitors a broad range of parameters including inorganic, organic, and radiological.
• Data is updated regularly, with a last recorded update in March 2026.

Limitations

• Specific data structure, column names, and row counts are not provided in the input.
• Data availability is limited to voluntary participants in the program, not all municipal systems.
• Primary file formats are HTML and PDF, which are less machine-readable than structured formats like CSV.

Provenance

Source

Government of Ontario

Collection Method

Voluntary partnership program monitoring selected municipal drinking water systems.

Time Range

Data available by individual years.

Freshness

Last updated March 2026.

Geography

Municipal drinking water systems in Ontario, Canada.