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Combined sewer overflows (CSO) by municipalities cause contamination events during which the microbial quality of water is compromised, leading to increased exposure to infectious disease when engaged in recreational water activities. The frequency and magnitude of overflows is directly linked to precipitation events, as they happen when the water treatment capabilities are overwhelmed. With climate change having an impact on precipitation patterns, making extreme events even more common, it is to be expected that this problem will get worse in the future, representing a greater health hazard for the population.

The Challenge:

● Model the effect of precipitation on the duration of CSOs in Canada

● Explore the impact of climate change on CSO in various parts of the country and how they affect the risk of overflows in cities

Suggested sources of datasets (all open data)

We encourage the participants to as questions in the Slack channel #help_data_sources and #Help_mentors_experts. ECCC climate sciences and open data access will be available to support you

Environment and Climate Change Canada (ECCC) data MSC Open Data: Canadian Centre for Climate Services

Climate data extraction tool

Historical data: Hourly weather station data available here: Scripts to automate the download of many years is available under Get More Data

● Quebec SOMAEU portal and document:

● Fondation rivières map on overflow based on SOMAEU data

● Various temperature datasets can be found either through Kaggle, or through the Google Database search

○ Some data can be found in the links in this blog: climate-resources/

○ Canadian climate data can be downloaded from This data is generated using the CMIP5 climate model

Built With

  • sewer
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