Boil Water Notice
We have issued a boil water notice for some customers in the Rhondda area due to a potential risk to water quality.
If you have received a notification from us, or live in the affected area, your tap water may not be safe to drink unless it has been boiled. Please follow the advice below to protect you and your household.
This notice currently applies to customers in: Blaenrhondda, Blaencwm, Tynewydd, Treherbert, Treorchy, Cwm-parc, Pentre, Ton Pentre, Gelli and Tonypandy.
If you are unsure whether your property is affected, please use the postcode checker below.
This page will be updated 24/7 with the latest information. You can also find dedicated sections covering updates, advice, FAQs and other important information related to this incident.
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We can confirm that the precautionary boil water notice affecting customers in parts of the Rhondda area has been lifted with immediate effect. Customers in Blaenrhondda, Blaencwm, Tynewydd, Treherbert, Treorchy, Cwm-parc, Ton Pentre, Gelli, and parts of Pentre, Tonypandy and Ystrad no longer need to boil their drinking water.
This decision follows extensive water quality testing, which confirms that the supply is safe.
We recognise the significant impact this incident has had on customers and businesses over the past two weeks and we are very sorry for the disruption caused. The notice was issued as a precaution, with public health our highest priority.
Since flooding at Tynywaun Water Treatment Works during Storm Bert, our teams have worked around the clock to restore and protect the site, including measures to improve resilience against future extreme weather.
We have provided support throughout the incident, including bottled water supplies and goodwill payments of £250 for households and £500 for businesses. With the notice now lifted, bottled water stations and deliveries will cease.
We would like to thank our customers, colleagues, partners and local representatives for their patience, support and cooperation. We will continue to review our response to ensure we learn lessons and improve how we manage incidents in the future.
Boil Water Notice - Rhondda
Water bottle stations have been set up and are open in the following locations:
- Ynyswen Industrial Estate, Ynyswen Rd, Treorchy, CF42 6ED.
- Rhondda Sport Centre, Geligaled Park, Tyntyla Rd, CF41 7SY.
- Co-op, Station Road, Treorchy, CF42 6UA.
What do we advise if a boil notice is in place in your area?
Make sure that you boil your water for drinking — and don’t forget that you need to boil your water for:
- Preparing food
- Baby feeds
- Cleaning your teeth
- Ice making
Do Not:
DO NOT drink your tap water without boiling it first
DO NOT use tap water to prepare food without boiling it first
DO NOT use tap water to prepare food without boiling it first
DO NOT use tap water to clean your teeth without boiling it first
DO NOT prepare baby feeds with water without boiling it first
You Can:
You can use tap water to flush your toilet
You can use tap water to wash or bathe
If you want any more advice, please call us on 0800 052 0130 – lines are open 24 hours a day 7 days a week and keep an eye on social media and local press for announcements.
What can our customers do during this incident?
We would encourage our customers to:
We would encourage customers to not:
Bottled Water Information Leaflet
Compensation payments will be made as a result of this incident.
Household Customers
Any household customers who were affected will receive £25 for every 12 hours their supply was affected. This will be paid directly in to your bank account if you pay your bill by direct debit, if you do not pay by direct debit then you will receive a cheque in the post.
Business Customers
Each business customer will receive compensation of £75 for every 12 hours their supplies were affected.
In addition, Welsh Water has also agreed to make goodwill contributions for each business customer towards certain costs/loss of gross profit.
The eligibility, criteria and process for applying for a goodwill contribution towards costs/loss of gross profit is detailed in this guidance and should be read in full before making an application for a Goodwill Payment.
Affected businesses have a duty to take all reasonable steps to minimise its costs/loss of gross profit.
More information about eligibility criteria and how to apply is available here.
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Frequently asked questions
Boil notice came in effect at 5:00am on Sunday, 24th November.
As you know we have had significant rainfall over the last week, in fact the weather gauge at Tynywaun measured the second highest rainfall in the UK last Saturday and Sunday. This resulted in a significant amount of flooding on site at Tynywaun Water Treatment Works and surface water running from the hill onto the drinking water storage tank and impacting the tank. This is why we immediately issued a precautionary boil water notice while we do work to protect the tank.
We are facing a number of challenges as we try to complete this despite working 24/7.
First of all, some of the work to prevent damage from future flooding involves installing waterproof membranes around the storage tank. To do this successfully, we need a period of dry weather. The intermittent rainfall this week has, as you will have experienced locally, slowed our efforts to do this and there remains a risk of intermittent rain over the next few days. We also need to lay these membranes on the roof of the tanks, and to do this safely, we are limited in terms of the weight of machinery we can use while we work to achieve this.
The safety of our teams is also a priority which means that we need to take extra time to work carefully for this part of the essential works.
We have extend the ‘boil water notice’ by up to one week. The original notice started on Sunday 24th November and so we are asking customers to continue boiling their drinking water for another 7 days (until Sunday, 8th December).
To recognise this extended inconvenience, a further payment of £100 will be made to all affected households. This is on top of the original £150 payment issued to household customers. For businesses, we will make an extra payment of £200. This is in addition the £300 payment issued to businesses together with our scheme for contributing towards certain costs/loss of gross profit.
Only customers who received a text message directly from Welsh Water to a mobile or landline linked to the registered account, or a Welsh Water leaflet delivered in the post notifying them of the precautionary ‘boil water’ notice, will be eligible for the compensation.
We will cross reference any claim for compensation against our records of the communications that were issued to households.
Use boiled tap water for: - drinking (including water provided for domestic pets) - making ice cubes - preparing food (such as washing salads and fruit, where food will not be cooked) - brushing teeth - rinsing crockery, utensils and food preparation equipment after washing up by hand - preparation of infant formula i.e. any purpose where the water may be ingested.
Use water as normal for: - washing, showering and bathing (ensure young children do not swallow water) - toilet flushing - washing machines - dishwashers (on a hot wash cycle) i.e. any purpose where the water will NOT be ingested For hand-washing, ensure hands are washed with soap and are thoroughly dried on a clean towel or paper towel.
It is sufficient to bring water to the boil and then allow it to cool – prolonged boiling is not necessary. Using an electric kettle is fine.
Boiled water should be kept in a clean container in a fridge for no more than 24 hours.
No. You should never prepare drinks or food for consumption using water from a hot tap. Hot water can be used as normal for bathing, washing, laundry and dishwashing as above.
Our water system is not designed in the postcode format therefore neighbours can have different water supplies.
No. Domestic water filters should not be relied upon to purify the water. To avoid any potential contamination of your filter, we actually recommend that you do not use the filter whilst the boil water notice is in place or replace the filter once the notice is lifted since the filter may concentrate any potential contamination.
No. We do not recommend water purification tablets as an alternative to boiling.
No. We recommend that drinks vending machines are turned off. When the water supplies are back to normal, the machine should be cleaned and any filters replaced.
The same general advice applies as for domestic customers in that all water for drinking and food preparation should be brought to the boil and cooled as necessary.
The same general advice applies as for domestic customers in that all water for drinking and food preparation should be brought to the boil and cooled as necessary.
The same general advice applies as for domestic customers in that all water for drinking and food preparation should be brought to the boil and cooled as necessary.
Yes, they can drink from animal troughs as normal.
Latest UpdatesOur most recent updates on this incident are below, a list of all updates is available here
We have lifted the precautionary ‘boil water’ notice that was in place in parts of Rhondda Cynon Taf.
This means that customers are able to drink and use their tap water as normal with immediate effect.
Drinking water supplies are all clear and we can confirm customers are able to use their tap water as normal.
We apologise for the inconvenience this has caused and would like to thank all of our customers for their patience during this time.
Customers can access:
Lifting of Boil Water Notice: Open letter from Peter Perry
Check here for more information and a list of Frequently Asked Questions.
Visit In Your Area or check our social media channels for further updates.
If you have any questions, you can call us on 0800 052 0130, lines are open 24 hours a day 7 days a week.
IMPORTANT: We have extended the Boil Water Notice which affects customers living in the following areas: Blaenrhondda, Blaencwm, Tynewydd, Treherbert, Treorchy, Cwm-parc, Ton Pentre, Gelli, parts of Pentre, parts of Tonypandy and parts of Ystrad.
Storm Bert resulted in a significant amount of flooding on site at Tynywaun Water Treatment Works and surface water running from the hill onto the drinking water storage tank and impacting the tank.
Our crews have worked 24/7 to put this right but some of the work to prevent damage from future flooding involves installing waterproof membranes around the storage tank.
A period of dry weather is needed to achieve this successfully and our teams are working around the clock to get it done as quickly as possible.
In the meantime, we are continuing to ask all customers in affected areas boil their water before using it for drinking purposes.
We are delivering bottled water to customers on our Priority Services Register and care homes while also working with key sites such as hospitals.
Water bottle stations have been set up and are open in the following locations:
- Ynyswen Industrial Estate, Ynyswen Rd, Treorchy, CF42 6ED.
- Rhondda Sport Centre, Geligaled Park, Tyntyla Rd, CF41 7SY.
- Co-op, Station Road, Treorchy, CF42 6UA.
We are prioritising vulnerable customers, and are asking people to only take what they need.
Customers can access:
Boil Water Notice extension - Open letter to customers from our Chief Executive Peter Perry.
Check if their supply is affected by using a post code checker here: www.dwrcymru.com/boil-water-notice.
Check here for a list of Frequently Asked Questions.
Visit In Your Area or check our social media channels for further updates.
We are sorry for the inconvenience this incident has caused.
IMPORTANT: We have issued a Boil Water Notice which affects customers living in the following areas: Blaenrhondda, Blaencwm, Tynewydd, Treherbert, Treorchy, Cwm-parc, Pentre, Ton Pentre, Gelli, Tonypandy
Due to Stom Bert, extensive flooding has impacted Tynywaun Water Treatment Works in Treherbert.
This means that we have now issued a precautionary ‘boil water’ notice to households in Blaenrhondda, Blaencwm, Tynewydd, Treherbert, Treorchy, Cwm-parc, Pentre, Ton Pentre, Gelli and Tonypandy areas.
We ask that all customers boil their water with immediate effect before using it for drinking purposes. We are sorry for the inconvenience this will cause but we are working to restore supplies back to normal as soon as possible.
We have delivered bottled water to customers on our Priority Services Register and care homes while also working with key sites such as hospitals.
Water bottle stations
Water bottle stations are being set up to assist our customers following the ‘boil water’ notice for areas of Rhondda Cynon Taf.
We are prioritising vulnerable customers, and are asking people to only take what they need.
Water bottle stations have been set up and are open in the following locations:
- Ynyswen Industrial Estate, Ynyswen Rd, Treorchy, CF42 6ED.
- Rhondda Sport Centre, Geligaled Park, Tyntyla Rd, CF41 7SY
Customers can check if their supply is affected by using a post code checker on our website: www.dwrcymru.com/boil-water-notice.
Any customers who are affected can access advice on our website which includes a list of Frequently Asked Questions.
Visit In Your Area or check our social media channels for further updates.