A behind-the-scenes look at Ottawa’s water network
Every day in Ottawa, you turn on the tap, fill a glass, and carry on. It takes seconds. It feels effortless. And that’s exactly the point.
But behind that simple gesture is a very complex and sophisticated municipal water system – a system built on equity, engineered for resilience, and powered by dedicated staff who work around the clock to ensure every resident has access to clean, safe drinking water.
With World Water Day fresh in our minds, we’re taking you behind the scenes of Ottawa’s water network.
Ottawa delivers drinking water to approximately one million residents, businesses and institutions every single day. To reach them, water travels through:
More than 3,000 kilometres of buried watermains
Two major purification plants—Britannia and Lemieux Island
Five reservoirs and four elevated tanks, storing up to 275 million litres
16 pumping stations powering water through our city
More than 54,000 valves regulating flow and pressure across neighbourhoods
Together, this network produces and distributes an average of 275 million litres of treated drinking water daily. That’s enough to fill 110 Olympic-sized swimming pools.
It’s a system designed to ensure every resident – whether they live downtown, in a rural village, or in a growing suburban community, receives the same high-quality water processed and delivered to the same rigorous standard. That’s equity in action.
The people behind every drop
Reliable water service doesn’t happen automatically – it happens because our staff work hard behind the scenes. Here are just some of the experts who keep the system running:
Water Treatment Operators
They run the purification plants 24/7, monitoring thousands of data points to ensure that water quality meets the City’s rigorous standards.
Water Quality Technologists
They collect and analyze samples from across municipal and communal well systems—testing microbiological, chemical, and radiological parameters to uphold a 99.9% compliance rate with provincial standards.
Distribution and Field Crews
When a watermain breaks or pressure drops, they are the first on-site—repairing pipes, restoring service, and making sure disruptions are as short as possible.
Engineers, Planners, and Modellers
They design the infrastructure of the future – building resilience against population growth, aging assets and the increasing impacts of climate change.
Public Education and Outreach Teams
They help residents protect drinking water quality at home, from only flushing the 3 Ps (pee, poo and paper) to staying informed about private well testing and maintenance.
All staff, working together, ensure that safe drinking water remains accessible to everyone, everywhere in Ottawa.
In celebration of World Water Day and to bring you closer to the day-to-day of our water services staff we are introducing #OttaWater: A new social media campaign that pulls back the curtain on how Ottawa’s water system works and the people who make it flow.