Water Quality

Water Quality is closely monitored to ensure compliance with standards set by Ministry of Health.

On the District’s website is information on:

Water Quality Standards and Advisories

Ways Residents Can Preserve Water Quality

District Reporting on Water Quality

SPWD Position Paper on Lead in Drinking Water

The best way to make sure drinking water supplies are kept clean, safe and reliable is to take a preventive risk management approach. The District follows the recommendations contained in Health Canada’s Multi – Barrier Approach for Ensuring Safe Water.

The elements of the District’s Multi-Barrier Approach are:

Trustee and Management Actions

  • Be aware of Provincial regulatory framework 
  • Require certification of facilities & operators
  • Follow land-use bylaws, report land-use contraventions affecting water quantity and quality to zoning authorities 
  • Conduct enterprise and physical risk assessments and update plans as necessary
  • Maintain and update 10 year plan for facility maintenance and capital renewal

Public Education 

  • Maintain website with current and practical information on water quality
  • Require cross connection control of any secondary sources of water at premises
  • Encourage proper maintenance of septic systems
  • Emphasize the importance of protecting groundwater from contamination by animal droppings, improper disposal of chemicals & pharmaceuticals, petroleum spills from poorly maintained equipment, and use of pesticides,
  • Encourage conservation and rainwater capture for gardening

Source Protection

  • Wells are drilled into fractured sandstone and may have influence from surface water and so are considered GARP. Monitor potential issues through quarterly bacteria monitoring before, and after treatment, at all wells 
  • Ensure wells are properly drilled and completed
  • Inspect and maintain well equipment at appropriate intervals
  • Use professional well technicians for well equipment maintenance 
  • Divert storm water away from well
  • Ensure intrusion prevention measures are effective

Treatment

  • Follow the 4-3-2-1-0 treatment objective
    • 4 log inactivation of viruses. Achieved through regular testing of, groundwater sources and use of hypochlorite disinfection to maintain a minimum of 0.2 mg/L of free chlorine at ends of system, 
    • 3 log removal or inactivation of Giardia and Cryptosporidium parasites. Achieved regular testing of groundwater sources, sand filtration, RO (reverse osmosis) micro filtration, and use of hypochlorite disinfection into Reservoir at a minimum level of 1.2 mg/L  and an average of 7 days of residence time.
    • 2 treatment processes for all sources including groundwater from District’s 3 wells which are not subject to GARP. Achieved through well protection, raw water treatment through multiple process including sand filtration, greensand oxidation, RO micro filtration, and 5 micron cartridge filtration
    • <1 NTU of turbidity (goal of 0.1). Achieved through 5 micron cartridge filtration after sand or RO micro filtration
    • 0 total and fecal coliforms and E. Coli: Achieved through use of hypochlorite disinfection. Monitored monthly at ends, quarterly at each well
  • Maintain operation logs of treatment effectiveness, operation issues, and maintenance
  • Ensure use of approved materials and components in treatment
  • Schedule renewal of filtration media

Secure Distribution Network

  • Use sodium hypochlorite for disinfection
  • Maintain chlorine residual in Reservoir and throughout system
  • Ensure installation of backflow prevention at each meter

Monitoring

  • Ensure the Island Health approved testing plan for monitoring source quality parameters, bacteria, metals and other contaminants is followed
  • Track results and trends of parameters and treatment effectiveness
  • Monitor alarms from data supervision system
  • Record and track quality complaints from residents

Cleaning

  • Ensure the water main is flushed at least annually
  • Schedule cleaning of reservoir and intermediate tanks at appropriate intervals

Response

  • Regularly review and update emergency response plans
  • Maintain current resident contact list