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Homeowners: Protect Your Home & Your Pipes

Water System Components Property Owner vs City Responsibilities Call before you dig – it’s the law! Love Your Hydrant - Report Misuse on water theft, damage and tampering. Please call 905-477-5530.


Water System Components 

City of Markham's Water and Wastewater System Illustration

City of Markham's Water and Wastewater System Illustration The City of Markham repairs and maintains the water distribution system that provides safe, high-quality drinking water to over 35,000 customers daily. The City is responsible for the public portion of the system – spanning from the water main to the municipal property line. Beyond the Property line is the private portion of the system and is the responsibility of the property owner.

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Markham's Water Supply System 

City of Markham's Water and Wastewater System Illustration

Property Owner vs City Responsibilities

Markham’s Responsibility

  • Service (Curb) Box: Protects the curb stop valve and should be secured and flush with the ground. Never touch or cover it.
  • Curb Stop Valve: Located underground, this valve controls the flow of water from the water main to your property.
  • Remote Meter Reading Device: A small box mounted on the exterior of your property that allows the City to obtain meter readings without entering the premise.
  • Water Mains: More than 1,000 kilometers of underground pipes throughout the City that carry water to water service lines.
  • Service Connection: The part of the pipe that runs from the water main to the curb stop valve in front of your property.
  • Water Meter: Records the volume of water used by your property.

Property Owner’s Responsibility

  • Water Service Line: Pipe that runs between the curb stop valve and your property.
  • Indoor Water Shut-off Valve: Shuts off the water supply to your property.
  • Indoor Plumbing: The system of water pipes, drains, fittings, valves and fixtures in your building that distribute water.

Property owners shall provide free, clear and unobstructed access to the water meter at all times. Tampering or any alteration to the water meter is prohibited under the City’s Water Meter Bylaw 2012-242.


damaged componentReporting Damaged or Tampered Water Supply Components

If you suspect there is an issue with any component that the City is responsible for, please contact the Customer Contact Centre at or 905-477-5530.

Property Owner Maintenance

Maintaining the components of the water supply system that you are responsible for will help avoid unnecessary damage and costly repairs.

Things You Should Know

  • Your property’s main indoor water shut-off valve can be found near your water meter and is generally located in the basement. It is important to have access at all times in case of an emergency.

    Where to Locate Your Meter: Your water meter will generally be located in the basement of your household. They should be never be in cabinets or enclosures. It is important to know the location of your meter in case of emergency.

    Water shut-off valve inside your home will look similar to one of the valves here
  • Keep neighbourhood fire hydrants clear of snow, trees, or shrubs. Firefighters need to be able to see and access hydrants on your street.
  • Leaks left unrepaired can become costly to property owners and result in extensive property damage.

Second count. The home you save could be your own.

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outdoor projectPlanning Outdoor Projects Around Your Property 

Call Before You Dig

Contact On1Call to request locates for water and all other underground utilities so you can dig safely. Any damage or injury caused by interfering with buried infrastructure is the responsibility of the property owner.

Request your free locate at or 1-800-400-2255. Open 24 hours a day, 7 days a week.


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