Derry Water — water body quality
near Knockananna, Wicklow
Derry Water is a river in Wicklow, near Knockananna, extending 65.3 km.
Official classification
Good
Assessed 2026
Good ecological status under the Water Framework Directive means the biology and chemistry of this water body depart only slightly from near-natural conditions for its type, which meets the Directive’s environmental objective.
| Stretch | Status |
|---|---|
| Derry Water | Good |
| Derry Water | Good |
| Derry Water | High |
Overall status reflects the worst stretch (precautionary).
This water body
- Type
- River
- Length
- 65.3 km
- County
- Wicklow
- Location
- 52.8490, -6.4292
Others in Wicklow
This page shows water-quality information, not swim-safety advice. For today's conditions and swim-safety guidance, check Water Safety Ireland.
Official classifications on this page contain EPA Water Framework Directive ecological status data © Environmental Protection Agency, licensed under CC-BY-4.0.