Excess water consumption: reacting before the bill arrives

An invisible leak on a buried pipe can cost thousands before anyone notices.

Water is one of the few charge headings where an anomaly can go unnoticed for months. A leaking pipe in the basement, a running cistern in a common room, a failing meter: nothing is seen or heard, and the bill only surfaces at the annual adjustment.

In a condo building the water supply contract is usually in the association’s name. Owners never see the bills: they discover the excess in the charge allocation, often a year too late.

Signals to watch

• General consumption rising with no change in occupancy.
• A growing gap between the main meter and the sum of the sub-meters — the most reliable signal.
• An alert from the water utility flagging abnormal consumption.
• A common water point running permanently: bin store, garden tap, irrigation.
• Damp patches in the basement or at the foot of the façade with no rainfall.

That last point is as much a leak as an incident to document: see how to track an issue end to end and keeping an incident log.

Actually reading the meters

Many buildings run on annual readings, sometimes estimated. That is far too coarse to catch a leak. A monthly reading of the main meter, written down somewhere, catches a drift in weeks instead of a year.

Where sub-meters exist, the gap between the main meter and their total is a direct measure of losses on the common network. A few percent is normal; a climbing gap is not.

When an owner disputes their consumption

A classic: an occupant receives an allocation attributing a volume they consider impossible. In practice the burden falls on whoever disputes it — readings, proof of a repaired leak, a meter test. The board does not arbitrate, but it can set out the procedure and check the manager is processing the request.

Schemes exist to cap an occupant’s water bill when a leak on a private pipe is proven, under strict deadlines and evidence rules. Contact the water utility as soon as there is doubt: those windows are short.

Prevention beats allocation

• Locate and map the stopcocks, riser by riser: without that, a leak is always repaired later.
• Inspect common water points during the annual walk-through.
• Track the condition of the risers: an old pipe that leaks once will leak again.
• Put riser replacement in the works plan rather than waiting for a burst.

That is exactly what the multi-year works plan is for, and a confirmed leak usually becomes a water damage claim where liability has to be settled.

What to ask the manager for

Water bills for the last three years, the detail of the readings, the history of utility alerts, and the record of leak-detection work. That is almost always enough to tell a structural problem from a one-off incident.

A monthly reading noted in a table costs five minutes a month and saves a four-figure adjustment.

Track your consumption with CoproHarmony

CoproHarmony stores readings, documents every incident with photos and dates, and keeps the history of work on the network. Create your free space.

The logical next question: should you fit individual water meters?

The hot water network calls for extra vigilance: see temperature, legionella and dead legs.