Promontory Water Hardness & Quality Report (2026)

The City of Chilliwack Water Utility supplies the Promontory neighborhood and other parts of the Fraser Valley Regional District in British Columbia. The vast majority of this water, 99.93%, comes from eight groundwater wells that draw from the Sardis-Vedder Aquifer. A tiny fraction, just 0.07%, is sourced from two wells tapping the Marble Hill Aquifer. This groundwater is disinfected and receives basic treatment at wellhead facilities before being distributed to around 95,000 residents through the municipal system. There are no surface water treatment plants involved in this supply.

The Sardis-Vedder Aquifer is a significant groundwater source nestled in the broad lowlands of the Fraser Valley. It's replenished by rainfall and water seeping in from the Vedder River and Chilliwack River watersheds. This aquifer's layers of sand and gravel were laid down during the Fraser Glaciation period, resting atop the softer sedimentary rocks of the Huntingdon Formation. This particular geological makeup, characterized by young, unweathered glacial-fluvial deposits, means the water dissolves very few minerals. Consequently, the supply is naturally soft, with minimal amounts of calcium, magnesium, and other scale-forming substances.

Because the water is so soft, residents in Chilliwack typically won't see much limescale buildup in their pipes, water heaters, or dishwashers. Appliances like washing machines and coffee makers are also less likely to suffer from mineral deposits, which can extend their lifespan and reduce maintenance. While a water softener isn't necessary or recommended, some people might choose to add minerals for taste or to improve soap lathering if they prefer a harder water feel. The City of Chilliwack Water Utility confirms that their water consistently meets all Health Canada guidelines, with routine monitoring showing no issues with lead, copper, PFAS, or other significant contaminants.