Crap Towns / Cardiff / Bathing water
How dirty is the water near Cardiff?
The one bathing water in or within 2 km of Cardiff, Llanishen Reservoir, was rated Excellent in 2025. Across Wales, 78 of the 112 bathing waters (69.6%) were rated Excellent and 2 (1.8%) Poor.
| Bathing water | 2025 rating | Distance |
|---|---|---|
| Llanishen Reservoir | Excellent | In town |
| Town | Distance | Rated Excellent |
|---|---|---|
| Cardiff | – | 1 of 1 |
| Barry | 11.5 km | 1 of 4 |
| Penarth | 6.4 km | 0 of 1 |