Hafren Dyfrdwy responds to ongoing water pressure concerns in two Flintshire villages
Residents in Penymynydd and Penyffordd are being sent a letter from water company Hafren Dyfrdwy addressing ongoing problems with low water pressure in the area.
The update was shared on social media byAlyn and Deeside MP Mark Tami, who said he has been corresponding with the company since November about the issue.
In the letter, dated 23 January 2026, Hafren Dyfrdwy apologises to customers for the disruption and sets out why supply problems have continued.
The company says work carried out in 2022 at Penymynydd reservoir found that returning it to service could risk water quality, leading to a decision to rely instead on the Llay booster station.
The letter explains that while this has protected water quality, the loss of the reservoir as a backup means more homes are affected when bursts occur on the network.
Hafren Dyfrdwy says it has already upgraded pumps at the Llay booster station and installed smart technology to monitor water flow and pressure, which it says has improved stability but not resolved all issues.
Looking ahead, the company states it plans to invest more than £260 million over the next five years to improve services, with the local area identified as a priority. Customers are told they will be given a named point of contact during future works and further details will be shared later in the spring.
Mr Tami said customers of Hafren Dyfrdwy should receive the letter by post this week.
He added that anyone unable to read the image of the letter online can contact his office for a written or PDF copy.
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