Richmond Water Hardness & Quality Report (2026)

Richmond 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 filtered and treated at the Seymour-Capilano Filtration Plant using ozonation, biofiltration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness is just 4 mg/L (0.2 gpg) — exceptionally soft, ranking among the lowest values of any major Canadian municipality.

Richmond's supply originates in Coast Mountain watersheds draining over granite, diorite, and volcanic basalt — crystalline igneous and metamorphic rocks that dissolve almost no calcium or magnesium into rainfall and snowmelt. The closed, uninhabited status of Metro Vancouver's protected watersheds ensures no land use activity alters the water's naturally near-zero mineral composition. Richmond's flat Fraser River delta geography means water travels farther through the distribution network than North Shore municipalities, but hardness remains essentially unchanged from the reservoir source.

With water this soft, Richmond homes are effectively free of scale build-up — taps, kettles, and appliances remain scale-free for years. However, the very low mineral content makes the water mildly corrosive, which can gradually affect older copper pipes and brass fittings in pre-1975 homes. Metro Vancouver adds a corrosion inhibitor to the supply; however, Richmond residents in older properties with original copper or galvanised plumbing should consider having tap water tested and may benefit from a basic inline pH-stabilising cartridge filter as a precautionary measure.