Central Coquitlam Water Hardness & Quality Report (2026)

Metro Vancouver Regional District provides the drinking water for Central Coquitlam, British Columbia. The supply originates from three protected mountain reservoirs: Coquitano Reservoir, Capilano Reservoir, and Seymour Reservoir. These sources are part of the Greater Vancouver watersheds, an expansive area of over 2,600 square kilometres of protected forested uplands. After collection, raw water travels through pipelines and pump stations to treatment facilities like the Seymour-Capilano Filtration Plant and Coquitlam Water Treatment Plant. From there, it's distributed to residents near Guildford Way and Dewdney Trunk Road.

The geology of the Metro Vancouver watersheds is characterized by granitic intrusions and volcanic rocks from the Coast Mountains Batholith, dating back to the Jurassic-Cretaceous periods. These formations are largely covered by thin layers of glacial deposits. Unlike many water systems, there are no significant aquifers or limestone formations contributing to the supply. The surface water dominates, and because it has minimal contact with soluble minerals like calcium and magnesium, the water is naturally very soft.

This very soft water means you'll notice less scale buildup in appliances like kettles and coffee makers, and your pipes will be spared from calcification. However, it might cause more rapid corrosion in metal fixtures, potentially leading to minor leaks or a slight metallic taste if the plumbing isn't protected. Laundry detergents and soaps will lather easily, and your skin might feel slick after showering. Softeners aren't necessary, and routine checks of your water heater's anode rod are recommended. The water is treated through conventional filtration, UV disinfection, and chloramination, with no reported issues regarding lead, copper, or PFAS.