Water Treatment & Distribution

The Village of Lions Bay’s water is supplied through two surface water supplies: Harvey Creek and Magnesia Creek. Water is drawn into the system via two creek intakes which feed the water treatment plants. There, raw water is initially treated by Ultraviolet (UV) light in order to inactivate pathogenic organisms and then followed up by the injection of chlorine in a liquid state (sodium hypochlorite) for disinfection. 

Once treated, water is distributed throughout the Village via a network of pipes, storage tanks, pressure reducing valve stations, and fire hydrants.

Storage Tanks

Water storage tanks are a critical component of the Village’s water distribution network.  Some key benefits of these facilities are:

• They supply water during emergencies such as fire flow and power outages,
• They help to balance the daily supply and demand volumes throughout the system
• They provide contact time for disinfectants to inactivate pathogens

The Village of Lions Bay maintains 5 potable water storage tanks; four on the Harvey Creek system and one on the Magnesia Creek system.

Pressure Reducing Valve (PRV)Stations 

Like many other mountainous communities, the Village of Lions Bay requires PRV’s to keep water pressures within reasonable tolerances. Water pressure within the distribution network can exceed 200 pounds per square inch (psi). Pressures in excess of 75 psi can rupture pipes, damage fixtures, and even injure people.  Public Works operates and maintains 17 PRV stations throughout the distribution system.

Fire Hydrants

The Village of Lions Bay has 72 hydrants dispersed throughout the distribution network. Not only do they provide water for fire fighting purposes, fire hydrants are used to clean the water distribution networks pipes. A fire hydrant's large diameter port enables the movement of large volumes of water which creates a scouring action and moves sediments and debris out of the system before it reaches residential water lines.

Have a leak? You may need to turn off your water at the property line. Public Works will loan you a water shut off key to do so.

The curb stop valve is usually located at the property line and can be an older or newer model. Older model valves keep turning and vary the water flow as the valve turns. Newer valves only turn one quarter turn either clockwise or counter clockwise.

To operate, place the shut off key on the valve stem and turn the key clockwise or counter clockwise to start or stop the flow. When the valve stem is in line with the service pipe the water is on and when it is perpendicular to the service pipe the water is off.

Public Works performs mandated daily, weekly, and biannual water testing throughout the distribution network. Special sampling is conducted as necessary in response to emerging contaminants through Vancouver Coastal Health. Water chemistry and microbiological results are used to optimise chemical feed rates and assess the need to perform distribution system maintenance

Sampling frequencies are as follows:

Raw Water (Harvey and Magnesia Intakes):

• Turbidity on a daily basis (workdays)
• Bacteriological samples (E. Coli and Total Coliforms) on a monthly basis
• Metals and Chemical Composition on a biannual basis.

Treated Water (5 station at Harvey and 3 stations at Magnesia):

• Chlorine Residual and Turbidity on a daily basis
• Bacteriological samples (E. Coli and Total Coliforms) on a weekly basis
• Metals and Chemical Composition on a biannual basis.

UV Reactors (Harvey and Magnesia Plants):

• Bacteriological samples (E. Coli and Total Coliforms) on a monthly basis.

A comprehensive biannual flushing campaign is carried out in the spring and fall for the purposes of cleaning the entire water main system. Predetermined fire hydrants are fully opened to generate the appropriate flows required in order to remove excess sediment and scour the mains. Water samples are taken at the start of flushing and at 5 minute increments to analyze for turbidity and chlorine residual.

Flushing may cause pressure changes, some discolouration, and sediment in the water from your residences taps. These short duration events can be cleared up by running a cold water tap for about 20 minutes. Running the cold tap in your bathtub is suggested to avoid clogging screens in faucets. Avoid running hot water until the cold water has cleared up. This is to avoid filling your hot water tank with dirty water. If these issues do not dissipate please call the Public Works On Call phone at  (604) 290-1498 so we can investigate.

Note: Public Works may perform periodic flushing of water from a main in response to water quality monitoring results or regulatory criteria. These criteria may include establishing a detectable disinfectant residual, the reduction or elimination of colour or turbidity, or the expulsion of water of poor quality.