Cariboo Water Hardness & Quality Report (2026)

Cariboo (a residential and commercial area in Port Coquitlam, BC, in the Metro Vancouver Tri-Cities area near the PoCo boundary with Coquitlam) receives its drinking water through the City of Port Coquitlam, purchasing supply from Metro Vancouver (GVWD) via the Tri-Cities distribution network. Water is treated at the Seymour-Capilano Filtration Plant using ozonation, biofiltration, UV disinfection, and chloramination, fully meeting the Guidelines for Canadian Drinking Water Quality (GCDWQ). Hardness in the Cariboo distribution zone is 42.5 mg/L (2.5 gpg) — classified as soft by Health Canada, notably softer than the eastern Coquitlam and Tri-Cities corridor (Port Moody 90.5 mg/L, Coquitlam 87.5 mg/L from batch 4).

Caribboo's 42.5 mg/L — significantly softer than the broader Tri-Cities corridor — is consistent with the western Coquitlam supply sub-zones (Coquitlam Town Centre 32.5 mg/L, Coquitlam West 31.5 mg/L from batch 15 and 16), confirming that the westernmost Port Coquitlam–Coquitlam fringe area near the Burnaby boundary receives a predominantly Capilano and Seymour watershed supply rather than the harder Coquitlam Lake reservoir supply that dominates the eastern Tri-Cities corridor. The 42.5 mg/L result confirms the soft western Metro Vancouver supply character extends into the western Port Coquitlam area.

With 42.5 mg/L of hardness, Cariboo homes are essentially scale-free — occasional kettle cleaning every two to three months is sufficient. Hot water tanks have an excellent operational lifespan. The City of Port Coquitlam provides water quality information at portcoquitlam.ca.