Lough Swilly — water body quality
near Tonduff, Donegal
Lough Swilly is a coastal water in Donegal, near Tonduff, covering 97.7 km².
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 |
|---|---|
| Lough Swilly | Good |
Overall status reflects the worst stretch (precautionary).
This water body
- Type
- Coastal water
- Area
- 97.7 km²
- County
- Donegal
- Location
- 55.2004, -7.5494
Others in Donegal
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.