[SeaHorse_Fanatic]

For Metro Vancouver (including Burnaby reefers), I found this posted by the government:

"Metro Vancouver draws its water from Capilano, Seymour and Coquitlam sources and distributes it through its waterworks systems to member municipalities after treatment. As a part of the provision for treating water, Metro Vancouver uses chlorine as a primary disinfectant for Seymour and Capilano source waters. Coquitlam source water uses ozone and ultraviolet (UV) light as primary disinfectants. These source waters are subsequently
re-chlorinated at various regional secondary disinfection facilities installed in 1998. The disinfectant dosages are monitored at the regional chlorination facilities using on-line potentiometric chlorine analyzers.

The Seymour-Capilano Filtration Plant (SCFP) which is located near Rice Lake in the Lower Seymour Conservation Reserve went to full filtration on January 15th, 2010 and operated successfully throughout 2010. The Seymour source water is now be treated (filtration, corrosion control and disinfection) at SCFP and is conveyed by regional water mains to member municipalities for distribution to homes, businesses and industry. The primary disinfection facility at Seymour Falls Dam continued to operate until July 22, 2010.
Metro Vancouver discontinued chlorination of the Seymour source at Seymour Fall Dam on July 29th, 2010. When the twin tunnel component of the SCFP project is complete, the Plant will treat 1.8 billion litres of water from both the Seymour and Capilano sources. SCFP was constructed in the fall 2009, and is the largest of its kind in Canada. It includes the world’s largest ultraviolet disinfection system."