TL;DR: A sudden increase in your water bill in Christchurch is often caused by a hidden leak, increased usage, or a change in how water is being used. If the increase is unexpected, it is worth investigating.

Start with recent changes.

Changes in usage can sometimes explain a higher water bill.

Consider whether anything has changed recently, such as:

• More people in the household or building
• Increased use of appliances like washing machines or dishwashers
• Seasonal changes affecting water use

If nothing has changed, it may point to an underlying issue.

Hidden leaks are a common cause.

One of the most frequent reasons for a higher water bill is a leak that is not immediately visible.

This can occur in:

• Pipework behind walls or under floors
• Underground water lines
• Fixtures such as toilets or taps that are slowly leaking

Even a small leak can add up over time.

Toilets and slow leaks

Toilets that continue running or leak internally can waste a significant amount of water without being obvious.

This type of leak can go unnoticed for some time.

Outdoor leaks and irrigation

Leaks outside the property can also contribute to higher usage.

Look for:

• Wet patches in the garden when it has not rained
• Pooling around outdoor taps or pipes

These may indicate a leak in external pipework.

Check your water meter.

Your water meter can help confirm whether water is being used when it should not be.

Try this:

• Turn off all taps and appliances
• Note the meter reading
• Wait without using water
• Check the meter again

If the reading changes, there may be a leak somewhere in the system.

Why it should be investigated early

An unexplained increase in water usage can indicate a problem that may worsen over time.

Addressing it early can help avoid further costs and potential damage.