Westwood Plateau Water Hardness & Quality Report (2026)

Westwood Plateau's drinking water is managed by the City of Coquitlam, drawing from Coquitlam Lake via the Metro Vancouver (GVWD) supply infrastructure — the primary source for the Tri-Cities Coquitlam distribution zone, treated at the Coquitlam Water Treatment Plant using ozonation, biofiltration, UV disinfection, and chloramination, fully meeting the Guidelines for Canadian Drinking Water Quality (GCDWQ). Hardness in the Westwood Plateau distribution zone is 94 mg/L (5.5 gpg) — classified as moderately hard by Health Canada, consistent with the Coquitlam Lake source supply throughout the eastern Tri-Cities corridor.

Westwood Plateau (a scenic upscale hillside residential community at the foot of Burke Mountain in northeast Coquitlam — known for its mountain views, hiking trail access, and newer master-planned residential development on the slopes above the main Coquitlam urban area) sits at the eastern edge of the Metro Vancouver Coquitlam distribution zone, served by Coquitlam Lake reservoir supply — the distinctly harder Metro Vancouver source (at ~90–94 mg/L) compared to the softer Capilano/Seymour supply (15–55 mg/L) that serves the western Metro Vancouver communities. The 94 mg/L is consistent with Port Moody (90.5 mg/L from batch 4) and Coquitlam Town Centre (87.5 mg/L) in the same Coquitlam Lake corridor.

At 94 mg/L, Westwood Plateau residents experience moderate scale deposits — cleaning every two months is advisable. Hot water tanks operate reliably at this hardness. The City of Coquitlam provides water quality information at coquitlam.ca. The neighbourhood's predominantly modern post-2000 housing features contemporary plumbing infrastructure meeting current Health Canada standards throughout.