The following page lists the reservoirs in the United Kingdom.
This list contains 273 individual reservoirs, which amount to approximately 90% of total reservoir storage in the United Kingdom, sourced from the Environmental Information Data Centre.
| Rank | Name | Country | County |
Location | Maximum volume m3[1] | Planning
date | Completion
date |
|---|
| 26 | Abberton | England | Essex | TL981001830051.8282°N 0.8734°W | 39,000,000 | 1935 | 1939 |
| 175 | Agden | England | South Yorkshire | SK261009230053.4269°N -1.6087°W | 2,859,000 | 1864 | 1869 |
| 152 | Allerton Newton Fairburn | England | West Yorkshire | SE450002720053.7393°N -1.3192°W | 3,347,500 | NA | NA |
| 229 | Allt na Lairige | Scotland | Argyll and Bute | NN253001740056.3167°N -4.8262°W | 1,838,000 | 1943 | 1956 |
| 83 | Alton Water | England | Suffolk | TM162003570051.9777°N 1.1466°W | 9,100,000 | 1974 | 1986 |
| 60 | Alwen Reservoir | Wales | Conwy | SH955005300053.064°N -3.5609°W | 14,754,000 | 1909 | 1921 |
| 135 | Anglezarke | England | Lancashire | SD617001600053.6391°N -2.5808°W | 4,044,000 | 1850 | 1857 |
| 129 | Angram | England | North Yorkshire | SE040007600054.1798°N -1.9402°W | 4,737,000 | 1904 | 1918 |
| 119 | Ardingly | England | West Sussex | TQ335002880051.0431°N -0.0971°W | 5,206,000 | 1974 | 1979 |
| 210 | Ardleigh | England | Essex | TM034002820051.9152°N 0.9561°W | 2,109,000 | 1964 | 1979 |
| 143 | Arlington | England | East Sussex | TQ533520741950.846°N 0.1769°W | 3,545,800 | 1969 | 1971 |
| 185 | Audenshaw No.1 | England | Greater Manchester | SJ917009670053.467°N -2.1265°W | 2,590,000 | 1875 | 1882 |
| 234 | Audenshaw No.2 | England | Greater Manchester | SJ914009620053.4625°N -2.131°W | 1,745,000 | 1875 | 1882 |
| 183 | Audenshaw No.3 | England | Greater Manchester | SJ911009670053.467°N -2.1355°W | 2,680,000 | 1877 | 1882 |
| 201 | Baddinsgill | Scotland | Scottish Borders | NT128645578755.7875°N -3.3911°W | 2,250,000 | 1926 | 1828 |
| 144 | Baitings | England | West Yorkshire | SE010001890053.6666°N -1.9863°W | 3,523,000 | 1929 | 1956 |
| 168 | Bakethin | England | Northumberland | NY643009130055.2146°N -2.5626°W | 2,960,000 | 1971 | 1981 |
| 50 | Balderhead | England | County Durham | NY928001840054.5608°N -2.1129°W | 19,618,000 | 1959 | 1965 |
| 178 | Banbury | England | Greater London | TQ362009140051.605°N -0.0347°W | 2,779,000 | 1897 | 1903 |
| 166 | Banbury FSA | England | Greater London | TQ362009140051.605°N -0.0347°W | 3,040,000 | 2001 | 2012 |
| 202 | Barden Lower | England | North Yorkshire | SE035005670054.0063°N -1.9481°W | 2,240,000 | 1854 | 1873 |
| 209 | Barden Upper | England | North Yorkshire | SE012005780054.0162°N -1.9832°W | 2,112,000 | 1854 | 1873 |
| 261 | Barnacre North | England | Lancashire | SD526004780053.9242°N -2.7233°W | 344,000 | 1861 | 1878 |
| 264 | Barnacre South | England | Lancashire | SD526004760053.9224°N -2.7232°W | 248,000 | 1861 | 1878 |
| 268 | Barrow 1 | England | Somerset | ST536006720051.4019°N -2.6684°W | 157,000 | 1846 | 1850 |
| 265 | Barrow 2 | England | Somerset | ST539006750051.4046°N -2.6641°W | 245,000 | 1846 | 1850 |
| 208 | Barrow 3 | England | Somerset | ST543006800051.4092°N -2.6584°W | 2,160,000 | 1846 | 1850 |
| 191 | Bartley | England | West Midlands County | SP002008120052.4288°N -1.9985°W | 2,400,000 | 1925 | 1930 |
| 267 | Beacons Reservoir | Wales | Powys | SN987001858051.8566°N -3.4723°W | 160,000 | 1883 | 1897 |
| 96 | Beckingham FSA | England | Nottinghamshire | SK795009050053.4053°N -0.8056°W | 7,000,000 | 1960 | 1960 |
| 224 | Belmont | England | Blackburn with Darwen | SD673001640053.6431°N -2.4961°W | 1,886,000 | 1824 | 1826 |
| 206 | Belvide | England | Staffordshire | SJ865001020052.6893°N -2.2012°W | 2,196,000 | 1825 | 1833 |
| 239 | Ben Crom | Northern Ireland | County Down | SB401558200254.1678°N -5.9825°W | 1,700,000 | 1945 | 1957 |
| 32 | Bewl Bridge | England | East Sussex | TQ677683266351.0688°N 0.3931°W | 31,400,000 | 1967 | 1975 |
| 195 | Blackbrook | England | Leicestershire | SK458001750052.7532°N -1.3229°W | 2,300,000 | 1901 | 1906 |
| 160 | Blackmoorfoot | England | West Yorkshire | SE099001300053.6135°N -1.8518°W | 3,205,000 | 1869 | 1876 |
| 212 | Blackton | England | County Durham | NY944001860054.5626°N -2.0881°W | 2,105,000 | 1876 | 1896 |
| 5 | Blackwater | Scotland | Highland | NN247516029256.7014°N -4.864°W | 214,977,000 | 1904 | 1909 |
| 88 | Blagdon (Bristol) | England | Somerset | ST510006000051.337°N -2.7048°W | 8,260,000 | 1888 | 1904 |
| 52 | Blithfield | England | Staffordshire | SK060002350052.809°N -1.9124°W | 18,200,000 | 1892 | 1953 |
| 248 | Bosley | England | Cheshire | SJ922006590053.1901°N -2.1182°W | 1,224,000 | 1826 | 1931 |
| 196 | Bottoms (Longdendale) | England | Derbyshire | SK023009700053.4697°N -1.9668°W | 2,300,000 | 1848 | 1877 |
| 78 | Bough Beech | England | Kent | TQ494004770051.209°N 0.1374°W | 10,018,000 | 1965 | 1968 |
| 220 | Branston Island | England | Lincolnshire | TF100007100053.2247°N -0.3538°W | 2,000,000 | NA | NA |
| 246 | Brent | England | Greater London | TQ216008710051.5697°N -0.2469°W | 1,632,330 | 1819 | 1835 |
| 126 | Broomhead | England | South Yorkshire | SK269009590053.4592°N -1.5963°W | 4,937,282 | 1867 | 1929 |
| 69 | Brotherton Little Marsh to Birkin Holme Washland | England | North Yorkshire | SE521002530053.7215°N -1.2119°W | 11,320,000 | NA | NA |
| 102 | Burnhope | England | County Durham | NY847003900054.7457°N -2.2392°W | 6,438,182 | 1931 | 1937 |
| 132 | Burrator | England | Devon | SX556876856250.499°N -4.0362°W | 4,464,000 | 1891 | 1898 |
| 232 | Butterley | England | West Yorkshire | SE047001050053.5911°N -1.9305°W | 1,773,000 | 1789 | 1794 |
| 28 | Caban Coch | Wales | Powys | SN916006320052.2563°N -3.5895°W | 36,865,000 | 1892 | 1904 |
| 218 | Caldecott Lake | England | Buckinghamshire | SP899003580052.0134°N -0.6915°W | 2,014,000 | 1967 | 1972 |
| 269 | Cantref Reservoir | Wales | Powys | SN993801584051.8321°N -3.4616°W | 145,000 | 1884 | 1892 |
| 29 | Carsington | England | Derbyshire | SK248005140053.0593°N -1.6314°W | 36,000,000 | 1973 | 1992 |
| 75 | Catcleugh | England | Northumberland | NT747000310055.3213°N -2.4002°W | 10,500,000 | 1888 | 1905 |
| 240 | Catterall Flood Storage | England | Lancashire | SD468004130053.8652°N -2.8105°W | 1,700,000 | NA | 1982 |
| 214 | Cavendish Dock | England | Cumbria | SD212006830054.1045°N -3.2067°W | 2,053,000 | 1863 | 1879 |
| 63 | Cawood Ings Wistow Lordship | England | North Yorkshire | SE605003600053.8168°N -1.0826°W | 13,500,000 | NA | NA |
| 142 | Chasewater | England | Staffordshire | SK036000760052.6661°N -1.9482°W | 3,691,000 | 1794 | 1797 |
| 108 | Cheddar | England | Somerset | ST441005370051.2797°N -2.8028°W | 6,140,000 | 1933 | 1938 |
| 270 | Chelker | England | North Yorkshire | SE056405160053.9605°N -1.9155°W | 95,000 | NA | 1866 |
| 164 | Chelmarsh | England | Shropshire | SO734008750052.4848°N -2.3931°W | 3,063,320 | 1960 | 1963 |
| 273 | Chew Magna | England | Somerset | ST566006320051.3662°N -2.6248°W | 43,000 | 1850 | 1850 |
| 47 | Chew Valley Lake | England | Somerset | ST570006000051.3375°N -2.6187°W | 20,457,000 | 1939 | 1956 |
| 111 | Chrathaich | Scotland | Highland | NH364002070057.2476°N -4.7131°W | 5,629,000 | 1928 | 1955 |
| 177 | Church Wilne | England | Derbyshire | SK463003250052.888°N -1.3133°W | 2,790,000 | NA | 1972 |
| 22 | Claerwen | Wales | Powys | SN855006510052.2721°N -3.6795°W | 48,686,000 | 1892 | 1952 |
| 116 | Clatworthy | England | Somerset | ST043003140051.0739°N -3.3674°W | 5,364,000 | 1950 | 1958 |
| 197 | Clifton Ings Washlands | England | North Yorkshire | SE587005310053.9706°N -1.1066°W | 2,300,000 | NA | NA |
| 34 | Colliford Lake | England | Cornwall | SX179007100050.5104°N -4.5697°W | 29,100,000 | 1976 | 1983 |
| 127 | Colt Crag | England | Northumberland | NY940007810055.0973°N -2.0956°W | 4,855,000 | 1863 | 1884 |
| 73 | Covenham | England | Lincolnshire | TF346359601753.4437°N 0.0256°W | 10,900,000 | 1963 | 1978 |
| 24 | Cow Green | England | Durham | NY812002890054.6548°N -2.2929°W | 40,914,000 | 1958 | 1970 |
| 79 | Craig Goch | Wales | Powys | SN896006980052.3152°N -3.621°W | 9,583,000 | 1892 | 1904 |
| 136 | Cray | Wales | Powys | SN885002200051.8854°N -3.6214°W | 4,027,000 | 1898 | 1906 |
| 186 | Cropston | England | Leicestershire | SK547001100052.6939°N -1.1921°W | 2,528,000 | 1865 | 1870 |
| 48 | Crowlands Cowbit Washes | England | Lincolnshire | TF260001650052.7315°N -0.1355°W | 20,000,000 | NA | NA |
| 147 | Crummock Water | England | Cumbria | NY151002080054.5753°N -3.3149°W | 3,400,000 | NA | NA |
| 70 | Curry Moor Flood Storage Area | England | Somerset | ST326002700051.0384°N -2.9627°W | 11,283,000 | NA | NA |
| 44 | Daer | Scotland | South Lanarkshire | NS975750781255.3536°N -3.617°W | 22,494,000 | 1948 | 1956 |
| 205 | Dale Dyke | England | South Yorkshire | SK243009170053.4215°N -1.6358°W | 2,210,000 | 1853 | 1875 |
| 118 | Damflask | England | South Yorkshire | SK284009070053.4124°N -1.5742°W | 5,264,000 | 1864 | 1867 |
| 130 | Darwell | England | East Sussex | TQ715002120050.9647°N 0.4409°W | 4,730,000 | 1937 | 1949 |
| 194 | Delph | England | Greater Manchester | SD703001540053.6343°N -2.4506°W | 2,326,700 | 1905 | 1921 |
| 80 | Derwent | England | Derbyshire | SK173008980053.4047°N -1.7412°W | 9,470,000 | 1899 | 1916 |
| 19 | Derwent Reservoir | England | County Durham | NZ025005140054.8574°N -1.9626°W | 50,060,000 | 1950 | 1966 |
| 157 | Digley | England | West Yorkshire | SE110000700053.5595°N -1.8354°W | 3,260,000 | 1937 | 1954 |
| 258 | Doe Park | England | West Yorkshire | SE078003420053.804°N -1.883°W | 422,000 | 1857 | 1862 |
| 266 | Donolly Reservoir | Scotland | East Lothian | NT578006870055.9095°N -2.6766°W | 209,000 | NA | NA |
| 123 | Dovestone | England | Greater Manchester | SE016000360053.5291°N -1.9773°W | 5,048,000 | 1958 | 1966 |
| 43 | Draycote Water | England | Warwickshire | SP460007000052.3262°N -1.3265°W | 22,730,000 | 1965 | 1969 |
| 42 | East Ings and Wood Holmes Washland Reservoir | England | North Yorkshire | SE523002430053.7125°N -1.2091°W | 23,700,000 | NA | NA |
| 251 | East Warwick | England | Greater London | TQ348008850051.5793°N -0.056°W | 742,000 | 1853 | 1900 |
| 103 | Eccup | England | West Yorkshire | SE308004180053.8715°N -1.5331°W | 6,410,000 | 1885 | 1897 |
| 153 | Eglwys Nunydd | Wales | Neath Port Talbot | SS792008550051.5554°N -3.7438°W | 3,311,000 | 1957 | 1963 |
| 148 | Ennerdale Water | England | Cumbria | NY089001530054.5248°N -3.4091°W | 3,400,000 | 1902 | 1902 |
| 145 | Entwistle | England | Blackburn with Darwen | SD720001750053.6532°N -2.4251°W | 3,464,000 | 1832 | 1838 |
| 134 | Errwood | England | Derbyshire | SK014007520053.2738°N -1.9805°W | 4,216,000 | 1930 | 1967 |
| 90 | Eyebrook | England | Leicestershire | SP848009470052.5436°N -0.751°W | 8,096,000 | 1937 | 1940 |
| 187 | Farmoor No. 1 | England | Oxfordshire | SP445000680051.7581°N -1.3567°W | 2,505,000 | 1962 | 1967 |
| 122 | Farmoor No. 2 | England | Oxfordshire | SP445000600051.7509°N -1.3568°W | 5,055,000 | 1962 | 1977 |
| 125 | Fernilee | England | Derbyshire | SK013007770053.2963°N -1.982°W | 4,944,000 | 1930 | 1938 |
| 237 | Fernworthy | England | Devon | SX671008430050.6432°N -3.881°W | 1,727,300 | 1934 | 1942 |
| 141 | Fewston | England | North Yorkshire | SE187005410053.9826°N -1.7163°W | 3,845,000 | 1874 | 1879 |
| 231 | Ffynnon Llugwy | Wales | Conwy | SH692006240053.1426°N -3.957°W | 1,776,000 | 1915 | 1926 |
| 174 | Fiddler's Ferry P.S. Ash Lagoon D | England | Cheshire | SJ552008550053.3645°N -2.6747°W | 2,900,000 | NA | NA |
| 154 | Fontburn | England | Northumberland | NZ045009350055.2357°N -1.9308°W | 3,279,000 | 1898 | 1903 |
| 64 | Foremark | England | Derbyshire | SK329002440052.8161°N -1.5133°W | 13,193,490 | 1966 | 1977 |
| 76 | Fruid | Scotland | Scottish Borders | NT096891921755.4584°N -3.4297°W | 10,438,000 | 1953 | 1968 |
| 82 | Garreg Ddu | Wales | Powys | SN911006390052.2624°N -3.5971°W | 9,222,000[2] | 1892 | 1904 |
| 89 | Gladhouse | Scotland | Midlothian | NT297785359955.7706°N -3.1209°W | 8,133,000 | NA | 1879 |
| 84 | Glen Finglas | Scotland | Stirling | NN524100926056.2529°N -4.3838°W | 9,043,000 | 1911 | 1965 |
| 243 | Glencorse | Scotland | Midlothian | NT216476389755.8619°N -3.2534°W | 1,673,000 | 1819 | 1824 |
| 236 | Gorple Upper | England | West Yorkshire | SD924003140053.7789°N -2.1168°W | 1,731,000 | 1928 | 1934 |
| 110 | Gouthwaite | England | North Yorkshire | SE130006900054.1167°N -1.8026°W | 5,810,789 | 1893 | 1901 |
| 17 | Grafham Water | England | Cambridgeshire | TL170006700052.2887°N -0.2861°W | 55,490,000 | 1961 | 1965 |
| 109 | Grassholme | England | County Durham | NY938002240054.5967°N -2.0975°W | 6,060,000 | 1876 | 1915 |
| 146 | Greenbooth | England | Greater Manchester | SD853001520053.6331°N -2.2238°W | 3,405,000 | 1958 | 1962 |
| 45 | Grimwith | England | North Yorkshire | SE060006420054.0737°N -1.9098°W | 22,200,000 | 1856 | 1864 |
| 163 | Hallington East | England | Northumberland | NY973007630055.0811°N -2.0438°W | 3,116,740 | 1863 | 1872 |
| 149 | Hallington West | England | Northumberland | NY965007600055.0784°N -2.0564°W | 3,380,000 | 1876 | 1890 |
| 272 | Hampton - Sunnyside | England | Greater London | TQ127006900051.4088°N -0.381°W | 71,000 | 1852 | 1855 |
| 36 | Hanningfield | England | Essex | TQ733009840051.6577°N 0.504°W | 27,721,000 | 1949 | 1957 |
| 13 | Haweswater | England | Cumbria | NY500001550054.5323°N -2.7742°W | 84,840,000 | 1880 | 1935 |
| 176 | Heaton Park | England | Greater Manchester | SD825000470053.5387°N -2.2655°W | 2,800,000 | 1954 | 1955 |
| 263 | Hewenden | England | West Yorkshire | SE074003560053.8166°N -1.8891°W | 252,000 | 1842 | 1846 |
| 254 | High Maynard | England | Greater London | TQ355008960051.589°N -0.0455°W | 659,000 | 1867 | 1870 |
| 181 | Hilfield Park | England | Hertfordshire | TQ157009600051.6509°N -0.329°W | 2,728,000 | NA | 1955 |
| 189 | Hollingworth Lake | England | Greater Manchester | SD935001530053.6342°N -2.0998°W | 2,468,000 | 1794 | 1800 |
| 213 | Hollowell | England | Northamptonshire | SP690007240052.3453°N -0.9885°W | 2,064,000 | 1936 | 1939 |
| 256 | Hopes | Scotland | East Lothian | NT547006210055.85°N -2.7251°W | 600,000 | NA | 1933 |
| 85 | Howden | England | Derbyshire | SK170009250053.429°N -1.7456°W | 8,990,000 | 1899 | 1916 |
| 139 | Hury | England | County Durham | NY965001960054.5716°N -2.0557°W | 3,905,000 | 1876 | 1894 |
| 137 | Island Barn | England | Surrey | TQ139006700051.3906°N -0.3644°W | 4,011,000 | 1900 | 1911 |
| 215 | Jumbles | England | Greater Manchester | SD735001390053.621°N -2.4021°W | 2,050,000 | 1971 | 1971 |
| 61 | Kellington Ings Reservoir | England | North Yorkshire | SE591002450053.7136°N -1.106°W | 14,400,000 | NA | NA |
| 6 | Kielder | England | Northumberland | NY708008750055.1809°N -2.4601°W | 199,000,000 | 1971 | 1981 |
| 159 | Killington | England | Cumbria | SD590009100054.3129°N -2.6317°W | 3,238,210 | 1817 | 1819 |
| 217 | Kinder | England | Derbyshire | SK058508819053.3905°N -1.9135°W | 2,028,000 | 1899 | 1912 |
| 72 | King George V | England | Greater London | TQ374009650051.6505°N -0.0154°W | 10,981,000 | 1893 | 1912 |
| 51 | King George VI | England | Surrey | TQ041007320051.4482°N -0.5034°W | 18,732,000 | 1936 | 1947 |
| 35 | Ladybower | England | Derbyshire | SK200008550053.366°N -1.7009°W | 27,800,000 | 1920 | 1943 |
| 222 | Lamaload | England | Cheshire | SJ971007530053.2747°N -2.0449°W | 1,932,000 | 1958 | 1963 |
| 104 | Langsett | England | South Yorkshire | SE214000020053.4981°N -1.6789°W | 6,401,000 | 1897 | 1904 |
| 259 | Leeming | England | West Yorkshire | SE038003440053.8059°N -1.9438°W | 408,000 | 1872 | 1878 |
| 113 | Leigh Barrier (Medway) FSR | England | Kent | TQ565004630051.1945°N 0.2384°W | 5,580,000 | 1976 | 1982 |
| 128 | Leighton | England | North Yorkshire | SE162007880054.2047°N -1.7531°W | 4,780,000 | 1908 | 1926 |
| 165 | Lindley Wood | England | North Yorkshire | SE215004930053.9394°N -1.674°W | 3,045,000 | 1870 | 1874 |
| 167 | Linton Ings | England | North Yorkshire | SE484006040054.0373°N -1.2625°W | 3,000,000 | NA | NA |
| 238 | Little Swinburne | England | Northumberland | NY945007720055.0892°N -2.0877°W | 1,721,000 | 1863 | 1879 |
| 41 | Llandegfedd | Wales | Monmouhtshire / Torfaen | ST326009850051.6812°N -2.9763°W | 24,492,000 | 1957 | 1964 |
| 121 | Llwyn-On | Wales | Rhondda Cynon Taf | SO011001140051.7925°N -3.4354°W | 5,066,000 | 1884 | 1926 |
| 95 | Llyn Alaw | Wales | Gwynedd | SH374008540053.3404°N -4.4437°W | 7,400,000 | 1961 | 1965 |
| 230 | Llyn Aled | Wales | Conwy | SH916005790053.1072°N -3.6207°W | 1,777,000 | NA | 1934 |
| 93 | Llyn Arenig Fawr | Wales | Gwynedd | SH850003790052.9262°N -3.7121°W | 7,488,000 | NA | 1830 |
| 18 | Llyn Brenig | Wales | Conwy / Denbighshire | SH977005430053.0761°N -3.5285°W | 54,273,000 | 1973 | 1979 |
| 30 | Llyn Brianne | Wales | Powys | SN791004850052.1216°N -3.7673°W | 32,882,000 | 1967 | 1972 |
| 23 | Llyn Celyn | Wales | Gwynedd | SH859214042452.949°N -3.6993°W | 40,959,000 | 1957 | 1965 |
| 21 | Clywedog Reservoir (Llyn Clywedog) | Wales | Powys | SN898008850052.4833°N -3.6242°W | 48,828,000 | 1963 | 1967 |
| 81 | Llyn Cowlyd | Wales | Conwy | SH738006340053.1527°N -3.8886°W | 9,432,000 | 1891 | 1897 |
| 241 | Llyn Cwellyn | Wales | Gwynedd | SH554005560053.078°N -4.1601°W | 1,687,000 | NA | 1976 |
| 173 | Llyn Cwmystradllyn | Wales | Gwynedd | SH562004430052.9767°N -4.1431°W | 2,902,000 | 1959 | 1959 |
| 226 | Llyn Peris | Wales | Gwynedd | SH587005990053.1175°N -4.1127°W | 1,870,000 | 1973 | 1979 |
| 250 | Llyn Stwlan | Wales | Gwynedd | SH666004440052.9803°N -3.9884°W | 747,000 | 1952 | 1963 |
| 11 | Bala Lake (Llyn Tegid) | Wales | Gwynedd | SH929003500052.9017°N -3.5937°W | 106,751,000 | 1803 | 1804 |
| 40 | Llyn Trawsfynydd | Wales | Gwynedd | SH694003820052.9253°N -3.9442°W | 26,108,000 | 1924 | 1928 |
| 140 | Loch Achonachie | Scotland | Highland | NH446005460057.5547°N -4.5988°W | 3,873,000 | 1943 | 1954 |
| 37 | Loch an Diamh | Scotland | Perth and Kinross | NN508674635456.5853°N -4.4298°W | 27,052,000 | 1953 | 1959 |
| 57 | Loch Arklet | Scotland | Stirling | NN377800912056.2468°N -4.6196°W | 16,286,000 | 1902 | 1914 |
| 54 | Loch Bradan | Scotland | South Ayrshire | NX420529729755.2445°N -4.486°W | 17,475,000 | 1908 | 1912 |
| 105 | Loch Drunkie | Scotland | Stirling | NN542500439056.2097°N -4.3515°W | 6,346,000 | 1854 | 1864 |
| 4 | Loch Earn | Scotland | Perth and Kinross | NN699002420056.3921°N -4.1091°W | 397,630,000 | 1943 | 1958 |
| 190 | Loch Eigheach Gaur | Scotland | Perth and Kinross | NN461005690056.6784°N -4.5137°W | 2,461,000 | 1943 | 1953 |
| 1 | Loch Ericht | Scotland | Perth and Kinross | NN508006270056.732°N -4.4404°W | 1,291,596,000 | 1912 | 1962 |
| 8 | Loch Garry | Scotland | Highland | NH276000210057.0775°N -4.8459°W | 163,272,000 | 1943 | 1956 |
| 249 | Loch Gleann A'Bhearraidh | Scotland | Argyll and Bute | NM844642691156.3852°N -5.493°W | 774,000 | 1939 | 1939 |
| 2 | Loch Katrine | Scotland | Stirling | NN443350953056.2527°N -4.5142°W | 804,704,000 | 1848 | 1859 |
| 49 | Loch Loyne | Scotland | Highland | NH201000790057.1267°N -4.9736°W | 19,859,000 | 1938 | 1957 |
| 9 | Loch Luichart | Scotland | Highland | NH365006150057.6138°N -4.7387°W | 128,124,000 | 1943 | 1954 |
| 16 | Loch Lyon | Scotland | Perth and Kinross | NN452004170056.5417°N -4.5192°W | 59,270,000 | 1951 | 1958 |
| 58 | Loch Nant | Scotland | Argyll and Bute | NN003002490056.3741°N -5.2354°W | 15,464,000 | 1959 | 1963 |
| 3 | Loch Quoich | Scotland | Highland | NH071000230057.0712°N -5.1837°W | 556,677,000 | 1928 | 1955 |
| 260 | Loch Spey | Scotland | Highland | NN581009370057.0126°N -4.3385°W | 356,000 | 1918 | 1938 |
| 86 | Loch Thom | Scotland | Renfrewshire | NS259487219355.9113°N -4.7863°W | 8,668,000 | 1824 | 1827 |
| 65 | Loch Vaich | Scotland | Highland | NH346007490057.7333°N -4.7796°W | 12,388,000 | 1943 | 1957 |
| 20 | Loch Venachar | Scotland | Stirling | NN574390555056.2211°N -4.3007°W | 49,358,000 | 1854 | 1857 |
| 211 | Lockwood | England | Greater London | TQ353009020051.5944°N -0.0481°W | 2,106,000 | 1893 | 1903 |
| 257 | Loganlea | Scotland | Midlothian | NT194426239755.848°N -3.2882°W | 532,000 | 1847 | 1851 |
| 271 | Low Maynard | England | Greater London | TQ355008960051.589°N -0.0455°W | 80,000 | 1867 | 1870 |
| 124 | Marchlyn Mawr | Wales | Gwynedd | SH617006220053.139°N -4.0689°W | 5,017,000 | 1973 | 1979 |
| 14 | Megget | Scotland | Scottish Borders | NT192582219855.4869°N -3.2793°W | 63,722,000 | 1963 | 1983 |
| 162 | Meldon | England | Devon | SX563009160050.7062°N -4.0365°W | 3,170,000 | 1962 | 1972 |
| 245 | Mickletown Washland | England | West Yorkshire | SE415002710053.7386°N -1.3723°W | 1,655,000 | NA | NA |
| 227 | Midhope | England | South Yorkshire | SK223009940053.4908°N -1.6654°W | 1,859,000 | 1895 | 1903 |
| 244 | Misson East FSA | England | Nottinghamshire | SK709009490053.4461°N -0.934°W | 1,670,000 | NA | NA |
| 233 | Misson West FSA | England | Nottinghamshire | SK685009400053.4383°N -0.9703°W | 1,750,000 | NA | NA |
| 207 | More Hall | England | South Yorkshire | SK287009580053.4582°N -1.5692°W | 2,172,989 | 1867 | 1929 |
| 7 | Mullardoch | Scotland | Highland | NH222003130057.3374°N -4.9557°W | 165,226,000 | 1943 | 1951 |
| 39 | Nant-y-Moch | Wales | Ceredigion | SN754008620052.4595°N -3.8353°W | 26,292,000 | 1955 | 1964 |
| 193 | Northampton Washlands | England | West Northamptonshire | SP795006020052.2343°N -0.8373°W | 2,340,000 | NA | NA |
| 107 | Ogston | England | Derbyshire | SK378005990053.1349°N -1.4365°W | 6,180,000 | 1953 | 1958 |
| 198 | Oldbury Power Station | England | Gloucestershire | ST600009500051.6524°N -2.5796°W | 2,300,000 | NA | NA |
| 12 | Ouse Washes | England | Cambridgeshire | TL500008900052.4783°N 0.2072°W | 90,000,000 | NA | 1652 |
| 114 | Penygarreg | Wales | Powys | SN903006740052.2937°N -3.6099°W | 5,558,000 | 1892 | 1904 |
| 53 | Pitsford | England | Northamptonshire | SP755006890052.313°N -0.8939°W | 17,545,000 | 1946 | 1955 |
| 74 | Pontsticill (Taf Fechan) | Wales | Merthyr Tydfil / Powys | SO061001180051.7969°N -3.363°W | 10,717,000 | 1921 | 1927 |
| 55 | Queen Elizabeth II | England | Surrey | TQ118006710051.3919°N -0.3945°W | 16,809,000 | 1935 | 1967 |
| 33 | Queen Mary | England | Surrey | TQ073006970051.4162°N -0.4584°W | 30,363,000 | 1911 | 1925 |
| 31 | Queen Mother | England | Berkshire | TQ009007680051.4812°N -0.5484°W | 31,492,000 | 1945 | 1976 |
| 225 | Ravensthorpe | England | West Northamptonshire | SP681007040052.3275°N -1.0022°W | 1,884,000 | 1880 | 1890 |
| 200 | Rhodeswood | England | Derbyshire | SK044009820053.4805°N -1.9352°W | 2,273,000 | 1848 | 1855 |
| 262 | River Shin | Scotland | Highland | NC582000510058.0124°N -4.4017°W | 316,000 | 1954 | 1958 |
| 161 | River Till Controlled Washland | England | Nottinghamshire | SK703007750053.2898°N -0.9469°W | 3,200,000 | 1977 | 1990 |
| 106 | River Witham Flood Washlands | England | Lincolnshire | SK952006380053.1628°N -0.5775°W | 6,300,000 | NA | NA |
| 100 | Rivington Lower | England | Lancashire | SD630001240053.6068°N -2.5607°W | 6,516,000 | 1850 | 1857 |
| 27 | Roadford | England | Devon | SX420009000050.6881°N -4.2381°W | 36,910,000 | 1976 | 1989 |
| 188 | Roundhill | England | North Yorkshire | SE150007720054.1904°N -1.7716°W | 2,503,000 | NA | 1910 |
| 170 | Rudyard | England | Staffordshire | SJ945005960053.1335°N -2.0837°W | 2,949,700 | NA | 1796 |
| 10 | Rutland Water | England | Rutland | SK944000800052.6615°N -0.6057°W | 124,000,000 | 1968 | 1976 |
| 242 | Scaling | England | North Yorkshire | NZ749001280054.505°N -0.8448°W | 1,682,000 | 1946 | 1958 |
| 91 | Scammonden | England | West Yorkshire | SE053001670053.6468°N -1.9213°W | 7,873,000 | 1965 | 1969 |
| 77 | Scar House | England | North Yorkshire | SE058007690054.1878°N -1.9126°W | 10,069,000 | 1921 | 1936 |
| 171 | Seathwaite Tarn | England | Cumbria | SD250009860054.3774°N -3.1561°W | 2,945,000 | 1900 | 1907 |
| 59 | Selset | England | County Durham | NY918002110054.585°N -2.1284°W | 15,320,000 | 1955 | 1960 |
| 223 | Shustoke Lower | England | Warwickshire | SP228009120052.5182°N -1.6654°W | 1,921,000 | 1870 | 1884 |
| 150 | Siblyback | England | Cornwall | SX232007030050.5057°N -4.4946°W | 3,364,000 | 1965 | 1969 |
| 62 | Silent Valley | Northern Ireland | County Down | SB386597896754.1399°N -6.0027°W | 13,638,270 | 1910 | 1933 |
| 97 | Staines North | England | Surrey | TQ050007360051.4517°N -0.4903°W | 6,940,000 | 1898 | 1902 |
| 94 | Staines South | England | Surrey | TQ050007250051.4418°N -0.4906°W | 7,469,000 | 1898 | 1902 |
| 99 | Staunton Harold | England | Derbyshire | SK376792347352.8075°N -1.4425°W | 6,655,000 | 1958 | 1964 |
| 115 | Stithians | England | Cornwall | SW719003640050.1836°N -5.1965°W | 5,420,000 | 1955 | 1967 |
| 68 | Stocks | England | Lancashire | SD720005460053.9867°N -2.4285°W | 11,800,000 | 1910 | 1932 |
| 203 | Strines | England | South Yorkshire | SK232009050053.4108°N -1.6525°W | 2,239,000 | 1853 | 1869 |
| 184 | Sutton Bingham | England | Somerset | ST554001140050.9003°N -2.6356°W | 2,600,000 | 1952 | 1955 |
| 138 | Swinsty | England | North Yorkshire | SE196005340053.9763°N -1.7027°W | 3,936,000 | 1871 | 1877 |
| 204 | Swithland | England | Leicestershire | SK557001480052.728°N -1.1767°W | 2,227,540 | 1890 | 1896 |
| 180 | "Tadcaster, Hackenby, North Ings and Cock Beck" | England | North Yorkshire | SE495004200053.8719°N -1.2487°W | 2,748,750 | NA | NA |
| 66 | Talla | Scotland | Scottish Borders | NT117172153255.4796°N -3.3984°W | 12,020,000 | 1897 | 1905 |
| 67 | Talybont | Wales | Powys | SO106002050051.8759°N -3.3001°W | 11,921,000 | 1930 | 1939 |
| 221 | Tanygrisiau | Wales | Gwynedd | SH683004470052.9834°N -3.9632°W | 1,970,000 | 1952 | 1963 |
| 25 | Thirlmere | England | Cumbria | NY310001900054.5615°N -3.0686°W | 40,714,000 | 1879 | 1894 |
| 92 | Thruscross | England | North Yorkshire | SE152005780054.016°N -1.7695°W | 7,800,000 | 1955 | 1966 |
| 101 | Tittesworth | England | Staffordshire | SJ993005870053.1255°N -2.0119°W | 6,440,000 | 1858 | 1858 |
| 98 | Torside | England | Derbyshire | SK056009830053.4814°N -1.9171°W | 6,700,000 | 1848 | 1864 |
| 192 | Tunstall | England | County Durham | NZ065004080054.7621°N -1.9005°W | 2,360,000 | 1873 | 1879 |
| 169 | Underbank | England | South Yorkshire | SK253009920053.4889°N -1.6202°W | 2,955,000 | 1897 | 1904 |
| 71 | Usk | Wales | Carmarthenshire / Powys | SN821742854951.9429°N -3.7156°W | 11,235,000 | 1950 | 1955 |
| 182 | Vale House | England | Derbyshire | SK032609742053.4735°N -1.9524°W | 2,688,000 | 1848 | 1870 |
| 15 | Vyrnwy | Wales | Powys | SJ018001930052.7623°N -3.4567°W | 59,852,000 | 1879 | 1888 |
| 252 | Walthamstow No.4 | England | Greater London | TQ354008910051.5845°N -0.0471°W | 680,000 | 1853 | 1866 |
| 253 | Walthamstow No.5 | England | Greater London | TQ355008860051.58°N -0.0459°W | 680,000 | 1853 | 1866 |
| 179 | Walton - Bessborough | England | Surrey | TQ122006800051.3999°N -0.3885°W | 2,757,000 | 1898 | 1907 |
| 228 | Walton - Knight | England | Surrey | TQ117006800051.4°N -0.3957°W | 1,857,000 | 1898 | 1907 |
| 216 | Waskerley | England | County Durham | NZ025004430054.7936°N -1.9626°W | 2,046,500 | 1877 | 1877 |
| 156 | Watergrove | England | Greater Manchester | SD910001770053.6557°N -2.1377°W | 3,273,000 | 1930 | 1938 |
| 120 | Wayoh | England | Lancashire | SD737001640053.6434°N -2.3993°W | 5,100,000 | 1865 | 1876 |
| 112 | Weirwood | England | East Sussex | TQ406003530051.0998°N 0.0067°W | 5,623,000 | 1950 | 1954 |
| 235 | Wentwood | Wales | Newport | ST430009290051.632°N -2.8249°W | 1,739,000 | 1896 | 1904 |
| 117 | West Moor Reservoir | England | Somerset | ST416003260051.0897°N -2.8352°W | 5,359,000 | NA | NA |
| 255 | West Warwick | England | Greater London | TQ346008830051.5775°N -0.0589°W | 639,000 | 1853 | 1900 |
| 151 | West Water | Scotland | Scottish Borders | NT117305237755.7567°N -3.4081°W | 3,364,000 | 1966 | 1969 |
| 199 | Wet Sleddale | England | Cumbria | NY553001160054.4977°N -2.6917°W | 2,282,000 | 1880 | 1966 |
| 247 | White Holme | England | West Yorkshire | SD971001990053.6756°N -2.0454°W | 1,601,000 | 1807 | 1816 |
| 133 | Whiteadder | Scotland | East Lothian | NT654006350055.8634°N -2.5544°W | 4,239,000 | 1959 | 1968 |
| 172 | Widdop | England | West Yorkshire | SD930003300053.7933°N -2.1077°W | 2,912,000 | 1872 | 1878 |
| 219 | Willen Lake | England | Buckinghamshire | SP881004090052.0595°N -0.7164°W | 2,004,000 | 1967 | 1972 |
| 56 | William Girling | England | Greater London | TQ367009410051.6291°N -0.0264°W | 16,500,000 | 1935 | 1951 |
| 46 | Wimbleball | England | Somerset | SS967002930051.0537°N -3.4752°W | 21,541,000 | 1968 | 1979 |
| 87 | Winscar | England | South Yorkshire | SE153000260053.5199°N -1.7707°W | 8,300,000 | 1970 | 1975 |
| 131 | Woodhead | England | Derbyshire | SK082009940053.4912°N -1.8779°W | 4,700,000 | 1848 | 1877 |
| 38 | Wraysbury | England | Surrey | TQ025007450051.4602°N -0.526°W | 26,910,000 | 1945 | 1970 |
| 158 | Yarrow | England | Lancashire | SD624001550053.6347°N -2.5701°W | 3,252,000 | 1850 | 1877 |
| 155 | Ystradfellte | Wales | Powys | SN946001750051.8461°N -3.5315°W | 3,277,000 | 1902 | 1914 | |
