Llyn Celyn: This reservoir is located in Snowdonia National Park, North Wales. It is the largest reservoir in the UK and can hold up to 38,943 million gallons of water.
Vyrnwy: This reservoir is also located in Snowdonia National Park. It can hold up to 12,119 million gallons of water.
Alwen: This reservoir is located in Denbighshire, North Wales. It can hold up to 6,272 million gallons of water.
These reservoirs collect water from rain and snowfall, which is then filtered and treated before being supplied to homes and businesses in Liverpool. In addition to these reservoirs, Liverpool also gets some of its water from the River Dee, which is the longest river in Wales. The Dee Water Treatment Works near Chester treats up to 275 million litres of water per day, which is then pumped to Liverpool.
Liverpool also has a number of underground aquifers that provide water to the city. These aquifers are made up of layers of porous rock or sand that absorb water from the surface. The water in these aquifers is filtered naturally as it travels through the rocks, making it safe to drink.
Liverpool's water supply is managed by United Utilities, a water company that provides water and wastewater services to customers in the North West of England. United Utilities is responsible for ensuring that the city has a reliable supply of clean, safe water, and for the safe treatment and disposal of wastewater.