Dún Laoghaire Baths – Bathing Water Classification FAQs

Why has Dún Laoghaire Baths been given a “Poor” classification?

The classification is based on test results used by the EPA to assess water quality for 2025. In this case, it reflects a number of samples from one bathing season, where a few isolated pollution events had a strong impact.

Does “Poor” mean the water is always unsafe?

No. The classification reflects overall results used for reporting, not day‑to‑day conditions. Individual test results at the Dún Laoghaire Baths are often much better, and water quality can change quickly depending on weather and other factors.

Is swimming banned at Dún Laoghaire Baths?

No. There is no ban on swimming. The Dún Laoghaire Baths remain open. There may be an advisory notice in place, but this is to inform swimmers, not to prohibit swimming.

Why is classification made over a single season?

Dún Laoghaire Baths is a newly designated bathing water. This means the official classification is based on a limited dataset, rather than the larger number of samples usually available over time. We have significantly exceeded the minimum sampling requirements, carrying out frequent testing to give bathers the most up‑to‑date information on water quality using the prescribed testing method. 

What are you doing to improve water quality?

A detailed management plan is in place, including monitoring, investigation of pollution sources, and to reduce risks such as dog fouling.

What should the public do?

1. Always check the latest information before swimming. 
2. Look at signage at the Dún Laoghaire Baths or check the bathing results on-line especially after heavy rainfall or when advisory notices are in place.