Lough Neagh

Lough Neagh is a large freshwater lake in Northern Ireland. It is the biggest lake on the island of Ireland and in the British Isles. The lake covers an area of 148 square miles (383 square kilometres) and stretches about 19 miles (31 km) long and 9 miles (14 km) wide.

The lake provides drinking water for many people in Northern Ireland, supplying about 40.7% of the region's water needs. Rivers such as the Upper River Bann and Blackwater flow into Lough Neagh, while the Lower Bann drains out of it. There are also several small islands in the lake, like Ram's Island, Coney Island, and Derrywarragh Island.

The lake's name comes from the Irish language, meaning "Eachaidh's lake". While it is an important resource, since 2023, the lake has faced pollution from blue-green algae.

Geography

Lough Neagh is the largest lake in the British Isles, covering 148 square miles (383 km²). It is located 20 miles (32 km) west of Belfast and stretches about 19 miles (31 km) long and 9 miles (14 km) wide. The lake is shallow near the edges, with an average depth of about 30 feet (9 m), but it can reach up to 80 feet (24 m) deep at its deepest point.

The lake collects water from a large area, with about 43% of Northern Ireland's land draining into it. Water flows out to the sea through the River Bann. Lough Neagh is fed by several rivers, including the Main, Six Mile Water, Upper Bann, Blackwater, Ballinderry, and Moyola. Sadly, the lake has faced problems with harmful algae growth in recent years, mostly due to runoff from farms.

Management

Lough Neagh is looked after by a group called the Lough Neagh Partnership Ltd. This group includes local leaders, landowners, people who fish there, traders, and community members. They work together to protect the lake, share its benefits, and make sure it can be used in a way that is good for everyone.

Uses

Lough Neagh is used for many fun and useful things, but it can get very rough when the wind blows.

Water supply

Lough Neagh provides a lot of drinking water for Northern Ireland. There have been ideas to get even more water from the lake, but these plans haven't happened yet.

Navigation

In the past, people used special boats on Lough Neagh to travel and carry goods. Today, there are fewer of these boats, but some people are working to bring them back. There were also canals that connected the lake to other places, but most of them are not used anymore.

Lough Neagh Rescue helps with safety on the lake, working with trained volunteers.

Bird watching

Many bird lovers visit Lough Neagh to see the many different birds that live there.

Flora

The area around Lough Neagh has many different plants and small water plants.

Fishing

Lough Neagh is famous for its eels, which travel a long way from the ocean to the lake. These eels are important and are protected by law. The lake also has other fish like trout, salmon, and perch.

Human history

The English name for Lough Neagh comes from the Irish name Loch nEachach, meaning 'Eachaidh's lake'. When the English settled in Ulster, they tried to rename it "Lough Sydney" and "Lough Chichester" to honor important leaders, but the old name stayed.

Old Irish stories explain the lake’s name and how it formed. One story says the lake is named after a person called Echaid, who was in love with his stepmother. When they tried to run away, their horses were killed, and a spring appeared where they stopped. The spring overflowed one night, creating the lake.

Another story says Ireland’s famous giant Fionn mac Cumhaill threw a piece of earth into the sea, making the Isle of Man, and the hole left behind filled with water to become Lough Neagh.

In the year 839, Vikings used the lake for their ships during the winter. Later, during a time when England was taking control of Ireland, an Englishman named Sir Hugh Clotworthy was given responsibility for keeping boats on the lake. Over time, a nobleman named Sir Arthur Chichester claimed ownership of the lake and its fishing rights. Today, the lake is still owned by a member of the Shaftesbury family, who has talked about selling it to the public.

Algal bloom crises

Lough Neagh faced serious blue-green algae problems in the summers of 2023 and 2024. These algae blooms were so large that they could even be seen from space. They can harm animals like birds and fish by creating toxins and using up oxygen in the water.

These algae grow because the lake has too many nutrients like phosphorus and nitrates, mostly from farming runoff and sewage. Warmer summers and the lake's shallow depth also help the algae grow. An invasive species of mussel has made the water clearer, allowing more sunlight to reach deeper, which also helps the algae. Leaders in Northern Ireland agreed on plans to help the lake, though not everyone agreed on all the steps. Some people think the lake should be protected like a living being.