Promontory Water Hardness & Quality Report (2026)

Promontory's drinking water is managed by the City of Chilliwack, drawing from a local Fraser Valley watershed reservoir — Promontory is a newer residential community on the hillside of Promontory Heights in the City of Chilliwack in the Fraser Valley Regional District, east of Metro Vancouver on the Fraser Valley bench above the Vedder River floodplain, with panoramic views of the Cheam Range and the dramatic Mount Cheam summit rising above the Fraser Valley, a growing suburban community of single-family homes and townhouses drawn to Chilliwack's relatively affordable housing and mountain scenery. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, fully meeting the Guidelines for Canadian Drinking Water Quality (GCDWQ). Hardness measures 56.5 mg/L (3.3 gpg) — classified as soft by Health Canada, consistent with the local Chilliwack mountain watershed supply character.

Promontory draws from a local Chilliwack watershed reservoir — the Chilliwack/Vedder River watershed and the Cultus Lake-Chilliwack Lake mountain watershed terrain of the Cascade Range and Coast Mountains transition, drawing from Cretaceous and Jurassic plutonic terrain (Harrison-Boston Bar and similar granodiorite intrusions) with low carbonate content. The 56.5 mg/L is consistent with the outer Fraser Valley soft-to-moderate supply range, similar to West Clayton (36.5 mg/L) and Brookswood (58 mg/L) in nearby Surrey-Langley, reflecting the characteristically soft water of BC's mountain watersheds.

With 56.5 mg/L, Promontory homes are essentially scale-free — occasional kettle cleaning every three months is adequate. Hot water tanks have an excellent operational lifespan. The City of Chilliwack provides water quality information at chilliwack.com. Health Canada lead precautionary guidance applies to pre-1975 properties in the established Chilliwack residential area.