The  Thornhill Water System serves customers in Thornhill, from the Copper Mountain  Subdivision through the Queensway, Churchill Drive and bench area.  The  system relies on: 
    - Two deep wells in  the Copper Mountain Subdivision, 
 
    - A reservoir on  the hillside along Old Lakelse Lake Road, 
 
    - A reservoir on  Thornhill Street, 
 
    - A booster station mid-way up the bench along  Old Lakelse Lake Road, 
 
    - A smaller  reservoir and fire pump at the Thornhill Junior High School, 
 
    - Water mains of  100 mm to 300 mm diameter.
 
Water Advisories and Alerts information can be found by clicking the Alert Banner.