Lake
Lough Neagh
The largest lake in the British Isles by area and the source of around 40% of Northern Ireland’s drinking water. Severe cyanobacterial blooms since 2023 have made it the most prominent UK example of nutrient-driven eutrophication.
Key facts
- Surface area
- 392 km²
- Mean depth
- 9 m
- Share of NI drinking water
- approximately 40%
Relationships
- Located in: Northern Ireland
Related intelligence
Sources
- World Wildlife Fund / McGill University — HydroSHEDS / HydroRIVERS / HydroLAKES / HydroBASINS. Open — attribution required · CC BY 4.0
- Global Water System Project — Global Reservoir and Dam Database. Open — attribution required · CC BY 4.0
- Peer-reviewed scientific literature — Open-access hydrology, water chemistry and water use research. Public but restricted · Publisher terms — public access, reuse not clearly granted