Merton Water Services

Frequently asked questions

Who supplies the water in Merton?

Thames Water supplies Merton. You can reach them on 0800 316 9800. In parts of Merton the supplier can vary street to street, so check your bill if you are not sure.

I can see water leaking in the road — who do I tell?

Report it to Thames Water on 0800 316 9800. Leaks in the road or pavement are on the public network, which is theirs to fix — anyone can report one, and it costs nothing.

I have no water — what should I do?

Check with a neighbour first. If they have no water either, the problem is likely on the mains — call Thames Water on 0800 316 9800. If it is only your property, check your internal stop tap is fully open; if it is, the fault may be on your own supply pipe — the part we repair and replace.

Who handles sewerage and drains in Merton?

Thames Water handles both the water supply and the wastewater in Merton, so it is one company for both. The drains inside your property boundary are the owner's responsibility — that is the work we do.

Is the water hard or soft in Merton?

Merton's water is hard, and the risk of limescale in kettles and boilers is high. A filter or softener can help — see our water filter guide for Merton.

Which nearby towns do you also cover?

As well as Merton, we cover the surrounding area, including Sutton (3 miles), Kingston upon Thames (5 miles), Kingston (5 miles), Croydon (5 miles), Balham (5 miles) and Battersea (5 miles).

Which postcodes does Merton cover?

The Merton area covers SW and SM.