Cardiff Water: Meter Rates, Bills & Supply Info

Cardiff water tap

If you just moved and have some Cardiff water questions, you will be able to find who handles the Cardiff water supply as well as Cardiff wastewater treatment in the water information below. Additionally, we have tips on how to deal with Cardiff water hardness so that you can enjoy quality tap water in your home.


Cardiff Water Supply

There are many things to know about water in the city of Cardiff. Cardiff Water is supplied by Dŵr Cymru Welsh Water. Here are the main Cardiff water supply contact details:

Cardiff Water Supply Contact

Calling a Cardiff Water contact number is one of many options to get in touch with the Cardiff water supplier Welsh Water Dwr Cymru. Different phone numbers are available depending on the nature of the call.

Cardiff Water Supply Phone Number List

Here are all the main Cardiff Water supply phone number lines divided up by team

Cardiff Water Supply Contact
Dŵr Cymru Welsh Water Team Phone Number Opening Times
Account Queries 0800 052 0145 Mon-Fri 8.00am-6.00pm
Automated Payments Line 0800 028 5209 24/7
Water Emergencies 0800 052 0130 24/7

Warning Calls starting with 03 may have local rate charges by your phone company.

Cardiff waste water treatment works contact

Cardiff sewerage and wastewater treatment are handled by the same company. Here are the main Cardiff sewerage and wastewater treatment contact details:

Cardiff Wastewater Treatment Phone Numbers
Dŵr Cymru Welsh Waste Water Team Phone Number Opening Times
Sewerage & Flooding Emergencies 0800 085 3968 24/7
Water Supply/Wastewater complaints 0800 052 0130 Mon-Fri 8.00am-6.00pm
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Welsh Water Cardiff address

Dŵr Cymru Welsh Water’s offices are located in Cardiff. This is both for Welsh Water Cardiff water supply and for Welsh Water Cardiff wastewater treatment:

Welsh Water Customer Services
Dŵr Cymru Welsh Water
PO Box 3118,
Cardiff, CF30 0BY

Water Rates Cardiff

Water rates in Cardiff depend on whether your home has a water meter or not. You can easily find out whether your Cardiff water rates are metered or not by looking at your water bill. Homes with metered Cardiff water rates will have a meter number listed on their water bills.

looking at a bill with a magnifying glass

Homes that are not metered won't, but they will have the rateable value of the home instead. The rateable value part of your Cardiff water rates will have been determined by the local council in the 90s and will probably not have changed since then.

The average Water Rates Cardiff residents are being charged result in an average water bill of around £447 a year. This amount combines both water supply and sewerage costs.

How do I pay my Wales water bill?

You will first need to sign up and register with Cardiff water supply provided by Welsh Water Dwr Cymru. See the complete details on Welsh Water Cardiff address and contact details for more details.

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Cardiff Water Hardness

With an average of 147 PPM, Cardiff water hardness is rated as moderately hard. While rainwater itself is relatively soft, water hardness can change through the water cycle. As rainwater filters through rocks, it picks up minerals, such as magnesium and calcium.

The more minerals the water picks up, the harder is your water considered.

Cardiff water hardness rating means that the hard water in your home will lead to scaling in kettles, showerheads, washing machines, and toilets. Here are simple tricks in ways to reduce scaling from your Cardiff water supply:

  1. Baths, sinks, and toilets - Use an acidic sanitiser regularly (available in local shops) to clean susceptible surfaces in order to clear limescale deposits.
  2. Kettles - Don't completely fill your kettle with water. You can clean your kettle by half-filling and diluting two tablespoons of white vinegar, leaving it for four hours in order to loosen scale build-up. Rinse and repeat to remove scale.
  3. Dishwashers- Use the built-in water softener. Make sure you occasionally top it off with dishwasher salt in the right compartment.

Is the tap water in Cardiff safe to drink?

Yes! You can drink the tap water in Cardiff. You can rest assured that Cardiff water meets high standards making it safe to drink. The UK Drinking Water Inspectorate has scored Cardiff water quality a 99.94% in overall mean zonal compliance, meaning that your water is safe to drink. It is not required to boil or filter Cardiff water to make it drinkable.

Where does the water in Cardiff come from?

There are three main sources of water that supply Cardiff. These sources can affect the Cardiff water hardness.

  • Surface sources - 93%
  • Groundwater sources - 6%
  • Mixed sources - 1%

How do I report a problem to Welsh Water?

If you notice a change in taste or smell of Cardiff water this may be due to one of the following reasons:

  1. Chlorination is a safe way to ensure hygiene throughout the pipe network.
  2. Seasonal changes in water characteristics can infuse Cardiff water with an earthy smell or taste.
  3. Plumbing can contribute to the taste of your household water, adding metallic, salty or rubbery hints.

If you have questions about your water's taste, smell, or appearance, you should not hesitate to contact Dŵr Cymru Welsh Water.

Other Cardiff Water Problems

Cardiff water problems can include anything from a burst water main or flooding to no water in your home. This is why you should make sure you know what to do and who to contact regarding water emergencies.

If you notice a water leak or flooding outside your Cardiff property, you need to do one of the following:

  1. If you are not in your home, call or tweet at Dŵr Cymru Welsh Water regardless if the issue relates to drinking water or wastewater.
  2. If you can access the internet, go to the "report a leak" section of Dŵr Cymru Welsh Water’s website and fill out the online form.

Cardiff No Water

If you have no water in your home, you need to find out if the issue is to do with your home plumbing or a Dŵr Cymru Welsh Water outage impacting Cardiff.

If there is no water for your home, is it only no cold water or no hot water? If you have cold water but no hot water, the issue will be with your home plumbing and not the Cardiff water supplier.

If there is no cold water, not even a trickle, contact Dŵr Cymru Welsh Water for assistance. In this case you should do the following:

  1. Look at the "In Your Area" sections of the Dŵr Cymru Welsh Water website for any information explaining why you have no water.
  2. Check with your neighbours whether they have the same issue or not.
  3. Verify that your emergency stop tap is open.
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