Maillardville Water Hardness & Quality Report (2026)

Maillardville, a neighborhood within Coquitlam, British Columbia, Canada, relies on the Metro Vancouver Regional District water supply system. The Metro Vancouver utility draws most of its water, about 85%, from the Coquitlam Lake reservoir. The remaining supply comes from the Seymour and Capilano reservoirs. Water destined for residents is processed at facilities such as the Coquitlam Water Treatment Plant, which handles approximately 80 million liters daily for the entire region. These vital watersheds are located within the Coquitlam, Seymour, and Capilano River drainages in the Pacific Ranges of the Coast Mountains, operating as protected source-to-tap systems with restricted public access.

The underlying geology in these mountainous areas features granitic intrusions and metamorphic rocks belonging to the Mesozoic Coast Plutonic Complex. Overlying this bedrock are layers of Quaternary glacial till and colluvium. This geological framework leads to very soft water. The rapid infiltration of precipitation through the fractured bedrock and thin soils, combined with the low cation exchange capacity of the soil and rock, limits the water's contact time with mineral-rich formations. Consequently, there's minimal dissolution of minerals, particularly calcium and magnesium ions, resulting in a characteristically low-mineralized water chemistry.

Because the water is soft, you'll notice less scale buildup on your fixtures, pipes, and appliances. This means your water heaters, dishwashers, and washing machines are likely to last longer with fewer issues. However, the water's slightly acidic nature can sometimes lead to increased corrosion in metal components like faucets and pipes over extended periods. Homeowners might want to perform periodic inspections for small leaks and consider using corrosion-resistant materials. Installing a water softener isn't generally recommended, as it could unnecessarily strip beneficial minerals or add sodium to the water. The Metro Vancouver supply is typically slightly acidic, with a pH usually between 7.0 and 7.5 after treatment, and it meets stringent health guidelines.