Northern Ireland’s blue spaces range from remote loughs to a dramatic coastline. These waters are nationally important, and the local water quality is generally high. However, pollution can threaten these environments – issues include sewage overflows, farm runoff, and pollution from towns and cities. While the Department of Agriculture, Environment and Rural Affairs (DAERA) and the Northern Ireland Environment Agency (NIEA) monitor 33 official bathing sites (mostly on the coast), many inland sites and popular swim spots are still unmonitored.

Data gaps and pollution threats

DAERA samples each designated bathing water weekly between 1 June and 15 September. Most monitored sites met classification standards 2024: of the 33 bathing sites, six got ‘sufficient’ or ‘poor’.

However, there are only 33 sites in total designated, and only one is inland. Monitoring happens weekly, results do not update in real time. Heavy rainfall can increase the risk of pollution, so officials advise water users to take care for up to 48 hours afterward. Like much of the UK’s inland waters, pollution from agriculture and urban areas remains an issue in non-designated and freshwater locations. DAERA investigates when water samples fail, but public data across all waters does not include continuous monitoring.

Who can apply?

Anyone – individuals, community groups, or local authorities – can nominate a site for formal bathing water designation, as long as usage and safety criteria are met.

What’s the criteria?

Usage evidence: You must be able to show that more than 45 bathers used the site on at least one day, or more than 100 beach users on at least two occasions during the review period.

Safety: Bathing must not be prohibited or inadvisable for safety reasons.

Facilities: Information about site facilities (signage, waste collection, access, car parks, lifeguards, changing rooms) is required.

Operator: You’ll need to identify a responsible body (for example, the council) who are willing to take on the role of bathing water operator.

Application process

1. Gather evidence of bather numbers and the site’s facilities.
2. Secure support from an appropriate operator willing to manage the site.
3. Email your application and evidence to Marine.InfoRequests@daera-ni.gov.uk.
4. DAERA will verify bather numbers during the next bathing season through independent surveys.
5. If DAERA confirms usage, it will hold a public consultation on the proposed designation.
6. Upon approval, DAERA will add the site to the monitored list for regular water quality checks.

There is no set annual deadline – applications can be submitted at any time, but designation typically follows verification during the summer monitoring period.

Suggested application timeline

While there’s no set timeline, here’s a suggestion for a good timeframe for putting together an application:

What happens next?

Designated sites are sampled weekly from June to mid-September. The water quality is classified as “excellent”, “good”, “sufficient”, or “poor”. If a site fails to reach standards, DAERA investigates causes (sewage, agricultural, or urban sources) and can require warning signage, notify the local authority, and take follow-up measures. Short-term pollution events prompt extra sampling and public alerts.