Port Moody Water Hardness & Quality Report (2026)

Port Moody's drinking water is managed by the City of Port Moody, drawing from Metro Vancouver (GVWD) — primarily via the Coquitlam Lake reservoir supply — through the Tri-Cities distribution network. Water is 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 Port Moody's distribution zone is 90.5 mg/L (5.3 gpg) — classified as moderately hard by Health Canada, consistent with the Tri-Cities corridor's elevated mineral content above Metro Vancouver's mountain source baseline.

Port Moody's 90.5 mg/L is characteristic of the Coquitlam reservoir supply zone — shared with Coquitlam (87.5 mg/L from batch 4), Port Coquitlam (88 mg/L from batch 7), and Fleetwood-Guildford BC. The Coquitlam Lake watershed drains the eastern Coast Mountains where the geology transitions from the highly insoluble western Capilano and Seymour granite watersheds to more mineralised Cretaceous volcanic and intrusive terrain in the lower Coquitlam highlands, plus longer distribution mains that contribute to moderate mineral accumulation.

At 90.5 mg/L, Port Moody residents experience moderate scale deposits on tap aerators and kettle elements — descaling every two months is advisable. Hot water tanks operate reliably at this hardness. The City of Port Moody provides water quality information at portmoody.ca; Port Moody's growing condominium density in the Moody Centre SkyTrain transit-oriented corridor brings new residents who may find the Tri-Cities supply noticeably harder than central Vancouver neighbourhoods but significantly softer than Interior BC cities such as Vernon (132 mg/L) or Penticton (113.5 mg/L).