Water Quality When Buying a House: What to Check

What your CON29DW search doesn't tell you

The CON29DW drainage and water search confirms who supplies water and sewerage to a property, and whether the property is connected. It does not include chemical readings — nitrates, lead, hardness or chlorine levels. For a fuller picture of water quality in the area you are buying, you need to look at the actual lab data for that postcode.

Lead pipes in UK homes

Properties built before 1970 often have lead pipes or lead solder in the plumbing. Lead can leach into drinking water and pose health risks, especially for children. Lenders and surveyors are increasingly flagging lead pipes as a risk factor. Check the lead levels for the supply zone before you exchange — and consider a professional water survey if the property is pre-1970.

Hard water and your new home

Water hardness varies by postcode. Hard water affects boilers, appliances and bills. Knowing the hardness level for your new area can help you budget for a water softener or scale prevention if needed.

Check any postcode before you buy

You can search any UK postcode — including the property you are considering — to see nitrates, lead, fluoride, chlorine and hardness. Data is sourced from the Drinking Water Inspectorate via the Stream open data initiative.