List of reservoirs in England and Wales by volume

The following page lists the largest reservoirs by volume in England and Wales.

Rank	Name	Owner	Location	Year Built	Nominal volume m³	Surface area m²	Ref.
1	Kielder Water	Northumbrian Water	Northumberland	1981	199,000,000	10,860,000	[1]
2	Rutland Water	Anglian Water	Rutland	1976	124,000,000	12,600,000	[1]
3	Haweswater	United Utilities	Cumbria	1935	84,840,000	3,900,000	[1]
4	Llyn Celyn	Welsh Water	Gwynedd	1965	80,930,850	3,300,000	[1]
5	Llyn Brianne	Welsh Water	Powys	1972	64,400,000	220,000	[1]
6	Llyn Brenig	Welsh Water	Denbighshire	1976	61,500,000	3,725,000	[1]
7	Lake Vyrnwy	Severn Trent Water	Powys	1888	59,700,000	4,536,000	[1]
8	Grafham Water	Anglian Water	Cambridgeshire	1965	57,800,000	6,280,000	[1]
9	Llyn Clywedog	Severn Trent Water	Powys	1967	49,940,000	2,490,000	[1]
10	Cow Green Reservoir	Northumbrian Water	Teesdale	1971	40,914,000	3,120,000	[1]
11	Thirlmere	United Utilities	Cumbria	1894	40,714,999	3,290,000	[1]
12	Claerwen	Welsh Water	Powys	1952	40,307,000	2,630,000	[1]
13	Derwent Reservoir	Northumbrian Water	County Durham	1965	40,060,000	405,000	[1]
14	Roadford Lake	South West Water	Devon	1989	36,910,000	2,987,000	[1]
15	Caban Coch	Welsh Water	Powys	1904	35,531,000	2,023,000	[1]
16	Llyn Trawsfynydd	Magnox Ltd	Gwynedd	1928	33,190,000	4,800,000	[1]
17	Nant y Moch	E.ON	Ceredigion	1964	32,564,000	2,630,000	[1]
18	Queen Mother Reservoir	Thames Water	Greater London	1976	31,492,000	1,922,000	[1]
19	Bewl Water	Southern Water	Kent	1975	31,000,000	3,120,000	[1]
20	Queen Mary Reservoir	Thames Water	Greater London	1931	30,363,000	2,863,000	[1]
21	Colliford Lake	South West Water	Cornwall	1983	29,100,000	3,660,000	[1]
22	Ladybower Reservoir	Severn Trent Water	Derbyshire	1943	27,800,000	2,100,000	[1]
23	Hanningfield Reservoir	Essex and Suffolk Water	Essex	1957	27,721,000	3,536,000	[1]
24	Wraysbury Reservoir	Thames Water	Greater London	1970	26,910,000	2,023,000	[1]
25	Abberton Reservoir	Essex and Suffolk Water	Essex	1939	25,721,000	4,900,000	[1]
26	Llandegfedd Reservoir	Welsh Water	Monmouthshire	1965	24,660,000	1,760,445	[1]
27	Draycote Water	Severn Trent Water	Warwickshire	1969	22,730,000	2,430,000	[1]
28	Grimwith Reservoir	Yorkshire Water	North Yorkshire	1983	22,200,000	1,500,000	[1]
29	Wimbleball Lake	South West Water	Somerset	1979	21,541,000	1,620,000	[1]
30	Chew Valley Lake	Bristol Water	Somerset	1956	20,457,000	4,856,000	[1]
31	Balderhead Reservoir	Northumbrian Water	County Durham	1961	19,618,000	1,170,000	[1]
32	King George VI Reservoir	Thames Water	Greater London	1947	18,732,000	1,420,000	[1]
33	Blithfield Reservoir	South Staffordshire Water	Staffordshire	1953	18,172,000	3,190,000	[1]
34	Pitsford Water	Anglian Water	Northamptonshire	1956	17,545,000	3,030,000	[1]
35	Queen Elizabeth II Reservoir	Thames Water	Greater London	1962	16,809,000	1,283,000	[1]
36	William Girling Reservoir	Thames Water	Greater London	1951	16,500,000	1,350,000	[1]
37	Pontsticill Reservoir	Welsh Water	Powys	1927	15,640,000	1,412,000	[1]
38	Selset Reservoir	Northumbrian Water	County Durham	1960	15,320,000	1,110,000	[1]
39	Alwen Reservoir	Welsh Water	Conwy	1921	14,564,200	1,490,000	[1]
40	King George V Reservoir	Thames Water	Greater London	1912	13,970,000	1,720,000	[1]
41	Foremark Reservoir	Severn Trent Water	Derbyshire	1977	13,193,486	930,000	[1]
42	Usk Reservoir	Welsh Water	Powys	1955	12,253,000	1,160,000	[1]
43	Stocks Reservoir	United Utilities	Lancashire	1932	12,006,000	1,390,000	[1]
44	Talybont Reservoir	Welsh Water	Powys	1939	11,668,000	1,272,000	[1]
45	Covenham Reservoir	Anglian Water	Lincolnshire	1972	10,900,000	882,000	[1]
46	Catcleugh Reservoir	Northumbrian Water	Northumberland	1905	10,480,000	107,000	[1]
47	Scar House Reservoir	Yorkshire Water	North Yorkshire	1936	10,069,000	700,000	[1]

References

1. Environment Agency. "Public Register of Reservoirs". Compiles a database of reservoirs in England and Wales.