How to Report a Water Leak to South West Water

Spotting a damp patch on the verge, hearing water running when every tap is off, or watching a metered bill creep up can all point to a leak. The first question most people in Devon ask is a simple one: who do I tell, and is this even my problem to fix? This guide walks through how to report a leak to South West Water, where the line of responsibility falls, and what support might be open to you once the leak is confirmed.

How to report a leak to South West Water

South West Water makes it straightforward to flag a leak, whether it is on the public network or on your own land. The usual routes are a phone call to their customer team or a report through the leak form on their website. Reporting tools and contact numbers do change from time to time, so it is worth checking the current details on the South West Water site before you get in touch rather than relying on an old number.

When you report, have a few details ready. Note exactly where the water is showing, when you first noticed it, and how bad it looks. A burst gushing across a pavement is treated very differently from a slow seep, so a clear description helps them decide how quickly to respond. If you can safely take a photo or a short video, that often speeds things along too.

Leaks in the street or on shared land

If you see water bubbling up through the road, pooling at the kerb, or running from a public footpath, that is almost certainly on the water company’s side of the network. You do not need to know whose pipe it is to report it. South West Water would far rather hear about a street leak twice than not at all, so report anything that looks like wasted water, even if a neighbour may have already called it in.

Who is responsible: the public main vs your supply pipe

This is where a lot of the confusion sits, and it is the single most useful thing to understand before you pick up the phone. Water travels from the company’s large distribution mains, along a communication pipe, to the edge of your property. From your boundary, a private supply pipe carries it the rest of the way into your home.

As a general rule, South West Water looks after the main and the communication pipe up to the boundary. From the boundary onwards, the private supply pipe is the property owner’s responsibility, along with all the internal plumbing, fittings and appliances. If a company stop tap has been fitted, it usually sits at or near that boundary and marks the changeover point between their pipework and yours.

A couple of things often surprise people. You can still be responsible for your supply pipe even where it runs under a road, a driveway or a neighbour’s land before it reaches your home. And if several homes share one supply pipe, the owners typically share responsibility for it between them. None of that changes the basic principle: once water has passed your boundary, the pipe is generally yours to maintain. Confirming a leak on a buried private pipe without digging up the whole garden is exactly what our mains water leak detection service is built for.

What if South West Water says you have a leak?

Sometimes the water company gets in touch first, often after spotting an unusual flow on a metered supply. If they believe the leak is on your private pipe, they may send a notice setting out that it needs fixing and giving you a window to do so. The exact timescales and wording vary, so read any letter carefully and check what is being asked of you. If you ignore a confirmed leak, a water company can in some cases arrange the repair and recover the cost from you, so it is far better to act early.

Acting early also limits the damage. A small underground leak can quietly wash away soil, soften foundations and push up a metered bill long before it shows on the surface. If you are not yet sure whether the problem is inside or outside, our guide on signs of a water leak under concrete can help you read the early warning signs.

Leak allowances and help with the cost

If you are on a water meter, a leak can land you with a bill for water that simply ran into the ground. This is where a leak allowance comes in. Many water companies, South West Water included, will consider crediting your account for some of the water lost through a genuine leak once it has been repaired. The idea is that you should not pay full price for water you never actually used.

Allowances are not automatic and the rules are specific, so always check the current South West Water policy rather than assuming. Typically you will need to have the leak repaired, then provide meter readings so the company can work out roughly how much water was lost. Allowances are often limited to one per property, and there can be conditions about how quickly the repair was done, so keep your paperwork and act promptly.

Beyond the allowance, some water companies offer extra help, such as a short free detection visit or a contribution towards repairing or renewing a leaking supply pipe for homeowners. These schemes change over time and come with their own conditions, so treat them as a possibility to ask about, not a guarantee. It is also worth checking your home insurance, as some policies include cover for tracing and accessing a leak.

Finding the leak before you repair it

Knowing a leak exists and knowing where it is are two very different things. On a private supply pipe that runs under a lawn, patio or driveway, digging at random rarely ends well. Pinpointing the exact spot first means a repair can be small, targeted and far less disruptive.

That is the part we handle across Devon. Using non invasive methods such as acoustic listening, tracer gas and thermal imaging, we trace the leak to a precise location so any excavation is kept to a minimum. If you have had a leak notice, or your meter is telling a worrying story, you can read more about how we work across the county on our Devon leak detection page, then get in touch for a clear next step.