Montreal Municipal Wastewater Overflow Durations

Under Quebec's ROMAEU regulation, operators must report daily cumulative overflow durations from municipal wastewater treatment works. The City of Montreal compiles and transmits this information monthly to the Ministry's SOMAEU monitoring system. The data was corrected on March 31, 2026 for a processing error affecting overflow durations.

Use Cases

• Monitor regulatory compliance based on reported overflow durations
• Analyze wastewater infrastructure performance based on overflow frequency and duration
• Identify seasonal or operational patterns in overflow events based on daily time-series data
• Assess environmental impact from wastewater releases based on overflow duration data

Strengths

• Data is compiled under a specific regulatory framework (ROMAEU), suggesting structured reporting
• Correction for a processing error was applied on March 31, 2026, indicating data maintenance
• Data is transmitted monthly to a government monitoring system (SOMAEU)

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Data may reflect geographic bias inherent to Montreal's municipal infrastructure

Provenance

Source

City of Montreal, transmitted to the Ministry of the Environment, the Fight against Climate Change, Wildlife and Parks

Collection Method

Compiled from overflow reports submitted monthly to the SOMAEU monitoring system

Freshness

Last updated 2026-04-17 15:46:24.791210

Geography

Montreal, Quebec