About 91 percent of the 4,550-sq km (1,756 sq miles) catchment area lies in Northern Ireland, says John Spence, a retired researcher specialising in aquatic systems management.

Exploring the highways and byways of Ireland's largest lake, Lough Neagh Christopher Moriarty takes us around the greatest lake in Ireland and one of the biggest in Europe.

Lough Corrib in Ireland’s wild west is the largest lake in the Republic of Ireland. An area of great natural beauty, it is also a paradise for anglers.

Lough Neagh — the largest freshwater lake on the island of Ireland — supplies more than 40% of Northern Ireland’s drinking water, and hosts the largest wild eel fishery in Europe.

READ MORE: Ireland’s biggest freshwater lake's algal bloom disaster predicted 20 years ago. READ MORE: 45% of household septic tanks near rivers and drinking wells failed inspection.

Lough Neagh is the biggest freshwater lake, by surface area, in the UK and Ireland, supplies 40 per cent of Northern Ireland’s drinking water and sustains a major eel-fishing industry.

Lough Neagh, the biggest lake in the UK and Ireland that provides 40% of Northern Ireland's drinking water, has become polluted by blue-green algae. BBC Homepage. Skip to content; ...

READ MORE: Ireland’s biggest freshwater lake's algal bloom disaster predicted 20 years ago. READ MORE: 45% of household septic tanks near rivers and drinking wells failed inspection.