Kerrisdale Water Hardness & Quality Report (2026)

Kerrisdale receives its water supply from the Greater Vancouver Water District, also known as Metro Vancouver. The primary sources are the Capilano Reservoir, Seymour Reservoir, and Coquitlam Reservoir, all located within the vast Capilano, Seymour, and Coquitlam watersheds in the Coast Mountains. These areas are fed by natural rainfall and snowmelt. The water undergoes treatment at facilities including the Capilano River Treatment Plant, Seymour-Capilano Filtration Plant, and Coquitlam Water Treatment Plant before being distributed to residents in Kerrisdale and the surrounding regions.

The underlying geology features granitic intrusions and metavolcanic rocks dating back to the Jurassic Coast Belt. These ancient formations are covered by Quaternary glacial deposits, such as till and outwash, which contain fragments of carbonate materials. This geological makeup allows for the dissolution of calcium and magnesium from sedimentary lenses and glacial sediments, resulting in a moderately mineralized water profile. The large volumes of the Capilano, Seymour, and Coquitlam reservoirs help to naturally dilute these minerals, contributing to the water's characteristic hardness for the area.

Homeowners may notice moderate scale buildup in appliances like kettles, water heaters, and dishwashers, which can lead to increased energy consumption and the need for periodic descaling. You might also find that soap doesn't lather quite as readily, though the effect isn't drastic. For those who prefer softer water or have older plumbing systems, installing a water softener is an option that could be beneficial. Regular cleaning, such as monthly vinegar rinses for kettles or annual professional servicing for water heaters, can help manage any scale formation. Metro Vancouver ensures the water meets all federal quality guidelines, employing chlorine for disinfection alongside advanced filtration methods.