Burnaby Water Hardness & Quality Report (2026)

Burnaby receives its drinking water through Metro Vancouver (Greater Vancouver Water District — GVWD), sourced from three protected mountain watersheds: Capilano, Seymour, and Coquitlam reservoirs on the North Shore mountains. Water is treated at the Seymour-Capilano Filtration Plant — one of the largest water treatment facilities in Canada — using ozonation, biofiltration, UV disinfection, and chloramination, fully meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures just 4 mg/L (0.2 gpg) — exceptionally soft and among the lowest values of any major Canadian municipality.

Burnaby's supply originates in Coast Mountain watersheds composed predominantly of granite, diorite, and volcanic basalt — resistant crystalline igneous and metamorphic rocks that resist chemical weathering and dissolve almost no calcium or magnesium into percolating rainwater and snowmelt. The closed, protected status of Metro Vancouver's watersheds ensures no agricultural or industrial activity alters the natural mineral composition. Burnaby's water is chemically identical to Vancouver's, representing effectively the natural composition of rainfall over granite mountain terrain.

With water this soft, Burnaby homes are virtually free of scale build-up on taps, kettles, and appliances. However, the very low mineral content makes the water mildly corrosive — older galvanised steel or copper pipe systems may develop pinhole leaks over time. Burnaby residents in homes built before 1970 are encouraged to check pipe material and consider testing water quality at the tap. Metro Vancouver adds a small amount of lime to raise pH and reduce pipe corrosivity; a basic pH-stabilising inline filter provides additional protection for older plumbing infrastructure.