Swimming has been banned for the entire 2025 bathing season at Sandymount Strand due to persistently poor water quality, while a temporary restriction remains in place at Dollymount Strand following suspected sewage discharge.
The bathing season, which runs from June 1 to September 15, has begun with significant restrictions affecting two of Dublin’s most popular beaches, raising concerns about water quality management in the capital.
At Sandymount Strand, the complete seasonal ban has been imposed based on water quality assessments conducted between 2021 and 2024, which consistently showed poor conditions. The restriction aims to prevent bathers from exposure to pollution that could pose health risks.
The situation at Dollymount Strand is more acute but temporary. A swimming ban was enacted on Tuesday following a deterioration in water quality caused by suspected sewage discharge from either a wastewater treatment plant or the sewer network. Dublin City Council attributes this contamination to recent heavy rainfall, which can overwhelm sewage systems and cause overflow into coastal waters.
Swimming at Dollymount is expected to resume tomorrow, pending water resampling and consultation with the Health Service Executive. The temporary nature of this ban suggests the contamination incident was acute rather than systemic, unlike the persistent issues affecting Sandymount.
Deputy Lord Mayor and Green Party councillor Donna Cooney criticized the restrictions as “disgraceful at the start of bathing season,” highlighting public frustration with water quality issues affecting Dublin’s beaches.
The bans underscore ongoing challenges with Dublin’s coastal water quality, particularly the impact of urban runoff and sewage infrastructure on bathing waters. Heavy rainfall events increasingly strain aging sewer systems, leading to discharge incidents that temporarily contaminate beaches.
Water quality monitoring is conducted regularly throughout the bathing season, with testing for dangerous bacteria including E.coli and Intestinal Enterococci, which indicate sewage contamination and can cause serious illness in swimmers. Dublin City Council also maintains year-round monitoring on a fortnightly basis outside the official bathing season.
The contrast between the two beaches illustrates different types of water quality challenges facing Dublin Bay. Sandymount’s seasonal ban suggests chronic pollution issues that have persisted over multiple years, while Dollymount’s temporary closure reflects acute contamination from a specific discharge event.
For Dublin residents and visitors, the restrictions significantly limit safe swimming options at the start of summer. The timing is particularly problematic as warmer weather typically draws more people to the beaches for recreation and exercise.
The bans also raise questions about infrastructure investment and environmental management in Dublin Bay. Persistent poor water quality at popular bathing sites suggests systemic issues that may require substantial upgrades to sewage treatment and stormwater management systems.
The Health Service Executive’s involvement in determining when swimming can safely resume at Dollymount demonstrates the serious health risks associated with sewage-contaminated water. Exposure to such pollution can cause gastrointestinal illness, skin infections, and other health problems.
These restrictions come at a time when public awareness of water quality issues is heightened, and expectations for clean, safe bathing waters are rising. The seasonal ban at Sandymount represents a significant public health measure but also highlights the ongoing environmental challenges facing Dublin’s coastal areas.
The temporary nature of Dollymount’s closure offers hope for a quick resolution, but the situation serves as a reminder of how weather events and infrastructure limitations can rapidly compromise water quality at popular recreational sites.