Derreen — water body quality
near Knockananna, Wicklow
Derreen is a river in Wicklow, near Knockananna, extending 176.1 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 |
|---|---|
| Derreen | Good |
| Derreen | Good |
| Derreen | Good |
| Derreen | Good |
| Derreen | Good |
| Derreen | High |
| Derreen | Good |
| Derreen | Good |
| Derreen | Good |
| Derreen | Good |
Overall status reflects the worst stretch (precautionary).
This water body
- Type
- River
- Length
- 176.1 km
- County
- Wicklow
- Location
- 52.8705, -6.5858
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.