Sewage Spills in Wales Exceeded 800,000 Hours Last Year, Report Claims

Sewage was released into rivers, lakes, and coastal waters across Wales for over 800,000 hours in the past year, according to an analysis of data from Welsh water companies by the charity Surfers Against Sewage. The report indicates more than 100,000 sewage discharges occurred in 2025, averaging one every five minutes. This represents a decrease from the previous year, when sewage was discharged for more than 970,000 hours.

Natural Resources Wales (NRW) stated that its regulatory approach has been strengthened through increased monitoring and stricter guidance. The agency also noted that it has overseen significant environmental investment programs by water companies.

Surfers Against Sewage attributed part of the reduction in discharge hours to the dry weather experienced during the summer months of 2025. However, the charity emphasized that underinvestment and a lack of enforcement continue to be significant issues. The report also highlighted a public health impact, noting that since 2019, the charity has received 992 reports of sickness in Wales linked to sewage pollution, with 215 of these occurring in 2025. These sickness reports resulted in an estimated loss of over 2,200 working days.

According to the charity's findings, sewage was discharged into Wales' designated bathing waters for a total of 35,669 hours throughout the year. At Llyn Padarn in Gwynedd, a lake designated for excellent water quality, discharges lasted for 1,614 hours. While regulations permit limited sewage discharge during periods of heavy rainfall, environmental groups express ongoing concern about the potential threat to wildlife and risks to human health for swimmers.

Giles Bristow, chief executive of Surfers Against Sewage, described the statistic of a discharge occurring every five minutes as "shocking." He pointed out that 90 locations designated as safe swimming spots have been affected by over 4,000 hours of sewage pollution. "It's a really terrible picture that we're seeing of continued underinvestment and a lack of enforcement to ensure that this isn't happening," Bristow stated. "People's lives and their health are being put at risk when they go to enjoy these amazing places."

Welsh Water acknowledged the concerns regarding sewage discharge and announced plans to invest a record £2.5 billion over the next four years. The company stated, "We take our responsibility to protect these waters seriously and recognise that we need to improve." They added, "In line with Welsh government policy, we are prioritising the overflows causing the greatest environmental harm."