Buying a Home with a Cistern? 10 Questions Most Buyers Don’t Ask

Concrete water tank

If you’ve just bought (or are thinking about buying) a home with a cistern, you’re not alone. Across rural Ontario, especially around Grey, Bruce, and Simcoe, many homes rely on stored water instead of a municipal line or a working well.

Cisterns are reliable and common, but most first-time buyers don’t know what to look for (or what questions to ask before signing). Here’s a few things to know ask before you move in.

1. How Big Is the Cistern?

A typical home uses about 85  gallons (321 litres) of water per person each day.

If your tank holds 3,000 (11,000 litres) gallons, you’ll likely need refills every couple of weeks or month depending on usage. Larger tanks mean fewer deliveries and more flexibility.

Mountain services truck filling a cistern

2. Where Is It Located?

Cisterns can be above ground, below ground, or even inside a basement.
Outdoor tanks need insulation and protection from freezing. Indoor tanks are easier to maintain but take up space.

3. What Material Is It Made Of?

Concrete, polyethylene (plastic), and fiberglass are most common.
Concrete lasts longest but can crack or leach minerals. Plastic is lightweight and easy to clean but more prone to floating or shifting if not installed properly.

4. How Old Is It?

Ask for installation records or previous service reports. A tank over 20 years old should be inspected for cracks, wear, and potential leaks.

5. How Is It Filled?

Most homes rely on bulk water delivery, but some have rainwater or well-water feed systems.
If you’re using delivery, get to know your local supplier and ask about scheduling, winter access, and emergency fills. (In the Blue Mountains, Meaford, and Owen Sound areas, we typically deliver within 24–48 hours.)

6. How Is the Water Pumped Inside?

Your home will have a pressure pump and often a backup jet pump or pressure tank.
If water pressure fluctuates or the pump runs constantly, it’s a sign of air in the line or a leak.

7. What’s the Access Point for Refilling?

Locate your fill pipe and ensure it’s clearly marked, easy to reach, and protected from debris or snow. A simple lid upgrade can prevent contamination and freezing in winter.

8. Has It Been Cleaned or Inspected Recently?

A cistern should be cleaned at least once a year, or sooner if you notice odours, sediment, or discoloured water. Regular inspection prevents algae growth and helps spot cracks early.

9. Is There a Backup Plan?

If you ever run out unexpectedly or lose pump power, what’s the plan?
Portable water storage or an auxiliary tank can save a headache during storms or delivery delays.

10. Who Do You Call for Service or Delivery?

Before moving in, line up a trusted local company for both delivery and maintenance.
Mountain Services offers bulk water delivery across the Blue Mountains, Thornbury, Clarksburg, Meaford, Annan, and Owen Sound areas.

Bottom Line

Cisterns aren’t overly complicated but they do need attention.
Know your tank, stay on a cleaning schedule, and connect with a reliable delivery company before you need one.

If you’re moving into a home with a cistern and want to start off on the right foot, Mountain Services can help with delivery, and system guidance so you’re never caught off guard.

Dean from Mountain services

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