💧 UK reservoir levels

How full are the reservoirs that supply our tap water — company by company, updated as each publishes.

63.1%

full on average, based on 128 reservoirs and groups across 10 companies — weighted by capacity where published.

>90% full 80–90% full <80% full
Northern Ireland — NI Water does not publish reservoir levels, so Northern Ireland doesn't appear here. If that changes, we'll add it.

Northumbrian Water

53.9%
— / 41,375 Ml
Last reported 28 Dec 2025
98.3%
— / 6,446 Ml
Last reported 28 Dec 2025
100.0%
— / 10,479 Ml
Last reported 28 Dec 2025
64.5%
— / 4,855 Ml
Last reported 28 Dec 2025
96.7%
— / 40,915 Ml
Last reported 28 Dec 2025
63.9%
— / 50,006 Ml
Last reported 28 Dec 2025
98.5%
— / 3,280 Ml
Last reported 28 Dec 2025
94.4%
— / 3,117 Ml
Last reported 28 Dec 2025
87.8%
— / 3,380 Ml
Last reported 28 Dec 2025
54.9%
— / 26,075 Ml
Last reported 28 Dec 2025
100.0%
— / 482 Ml
Last reported 28 Dec 2025
100.0%
— / 1,350 Ml
Last reported 28 Dec 2025
92.3%
— / 2,046 Ml
Last reported 28 Dec 2025
88.4%
— / 199,180 Ml
Last reported 28 Dec 2025
94.9%
— / 3,904 Ml
Last reported 28 Dec 2025
99.9%
— / 19,670 Ml
Last reported 28 Dec 2025
100.0%
— / 2,142 Ml
Last reported 28 Dec 2025
100.0%
— / 5,362 Ml
Last reported 28 Dec 2025
96.5%
— / 15,320 Ml
Last reported 28 Dec 2025
78.0%
As of 9 Aug 2026
87.4%
— / 648 Ml
Last reported 28 Dec 2025
64.0%
As of 9 Aug 2026
60.0%
As of 9 Aug 2026
71.0%
— / 2,459 Ml
Last reported 28 Dec 2025

Dŵr Cymru Welsh Water

98.6%
— / 6,961 Ml
Last reported 9 Dec 2024
96.0%
— / 1,726 Ml
Last reported 9 Dec 2024
64.1%
— / 0 Ml
Last reported 9 Dec 2024
15.5%
— / 1,136 Ml
Last reported 9 Dec 2024
71.2%
— / 13,619 Ml
Last reported 9 Dec 2024
100.0%
— / 1,629 Ml
Last reported 9 Dec 2024
100.0%
— / 1,574 Ml
Last reported 9 Dec 2024
69.7%
— / 0 Ml
Last reported 9 Dec 2024
61.1%
— / 1,205 Ml
Last reported 9 Dec 2024
100.0%
— / 439 Ml
Last reported 9 Dec 2024
98.6%
— / 62,639 Ml
Last reported 9 Dec 2024
100.0%
— / 1,272 Ml
Last reported 9 Dec 2024
100.0%
— / 72 Ml
Last reported 9 Dec 2024
100.0%
— / 1,636 Ml
Last reported 9 Dec 2024
54.8%
— / 80,930 Ml
Last reported 9 Dec 2024
100.0%
— / 721 Ml
Last reported 9 Dec 2024
100.0%
— / 10,889 Ml
Last reported 9 Dec 2024
74.8%
— / 4,202 Ml
Last reported 9 Dec 2024
87.4%
— / 1,687 Ml
Last reported 9 Dec 2024
100.0%
— / 634 Ml
Last reported 9 Dec 2024
100.0%
— / 214 Ml
Last reported 9 Dec 2024
98.5%
— / 2,910 Ml
Last reported 9 Dec 2024
79.7%
— / 678 Ml
Last reported 9 Dec 2024
100.0%
— / 213 Ml
Last reported 9 Dec 2024
66.4%
— / 0 Ml
Last reported 9 Dec 2024
86.1%
— / 2,078 Ml
Last reported 9 Dec 2024
66.8%
— / 1,416 Ml
Last reported 9 Dec 2024
61.3%
— / 334 Ml
Last reported 9 Dec 2024
43.0%
— / 23,650 Ml
Last reported 9 Dec 2024
75.4%
— / 1,305 Ml
Last reported 9 Dec 2024
85.4%
— / 1,198 Ml
Last reported 9 Dec 2024
99.7%
— / 4,834 Ml
Last reported 9 Dec 2024
96.5%
— / 62,304 Ml
Last reported 9 Dec 2024
100.0%
— / 356 Ml
Last reported 9 Dec 2024
79.5%
— / 995 Ml
Last reported 9 Dec 2024
94.9%
— / 880 Ml
Last reported 9 Dec 2024
100.0%
— / 395 Ml
Last reported 9 Dec 2024
94.0%
— / 1,083 Ml
Last reported 9 Dec 2024
90.6%
— / 10,242 Ml
Last reported 9 Dec 2024
96.2%
— / 795 Ml
Last reported 9 Dec 2024
100.0%
— / 697 Ml
Last reported 9 Dec 2024
95.7%
— / 352 Ml
Last reported 9 Dec 2024
96.6%
— / 349 Ml
Last reported 9 Dec 2024
66.3%
— / 285 Ml
Last reported 9 Dec 2024
86.8%
— / 570 Ml
Last reported 9 Dec 2024
84.3%
— / 14,729 Ml
Last reported 9 Dec 2024
100.0%
— / 57 Ml
Last reported 9 Dec 2024
99.1%
— / 171 Ml
Last reported 9 Dec 2024
100.0%
— / 644 Ml
Last reported 9 Dec 2024
99.6%
— / 339 Ml
Last reported 9 Dec 2024
99.8%
— / 0 Ml
Last reported 9 Dec 2024
84.3%
— / 14,729 Ml
Last reported 9 Dec 2024
70.0%
— / 11,245 Ml
Last reported 9 Dec 2024
78.0%
— / 619 Ml
Last reported 9 Dec 2024
99.6%
— / 338 Ml
Last reported 9 Dec 2024
95.4%
— / 831 Ml
Last reported 9 Dec 2024
80.6%
— / 13,092 Ml
Last reported 9 Dec 2024
8.4%
— / 1,880 Ml
Last reported 9 Dec 2024
100.0%
— / 2,150 Ml
Last reported 9 Dec 2024

Severn Trent Water 61.8% overall

61.8%
As of 17 Aug 2026
87.5%
2,871 Ml / 3,281 Ml
As of 17 Aug 2026
75.5%
27,430 Ml / 36,331 Ml
As of 17 Aug 2026
Charnwood Group total
33.8%
1,609 Ml / 6,229 Ml
As of 17 Aug 2026
35.8%
905 Ml / 2,528 Ml
As of 17 Aug 2026
31.6%
704 Ml / 2,228 Ml
As of 17 Aug 2026
48.4%
24,169 Ml / 49,936 Ml
As of 17 Aug 2026
Derwent Valley Group total
52.9%
24,518 Ml / 46,345 Ml
As of 17 Aug 2026
65.3%
6,189 Ml / 9,478 Ml
As of 17 Aug 2026
38.0%
3,419 Ml / 8,998 Ml
As of 17 Aug 2026
53.5%
14,910 Ml / 27,869 Ml
As of 17 Aug 2026
Dove Group total
63.9%
12,690 Ml / 19,845 Ml
As of 17 Aug 2026
67.5%
8,903 Ml / 13,190 Ml
As of 17 Aug 2026
56.9%
3,787 Ml / 6,655 Ml
As of 17 Aug 2026
78.5%
18,055 Ml / 23,000 Ml
As of 17 Aug 2026
Elan Valley Group total
58.5%
58,227 Ml / 99,500 Ml
As of 17 Aug 2026
55.1%
3,334 Ml / 6,050 Ml
As of 17 Aug 2026
100.0%
1,473 Ml / 1,473 Ml
Last reported 19 Jun 2023
43.8%
2,821 Ml / 6,440 Ml
As of 17 Aug 2026
71.9%
1,553 Ml / 2,160 Ml
As of 17 Aug 2026

Anglian Water

68.0%
— / 9,100 Ml
As of 17 Aug 2026
63.5%
— / 2,109 Ml
As of 17 Aug 2026
87.5%
— / 10,900 Ml
As of 17 Aug 2026
69.9%
— / 55,490 Ml
As of 17 Aug 2026
67.6%
— / 17,545 Ml
As of 17 Aug 2026
75.8%
— / 124,000 Ml
As of 17 Aug 2026

Yorkshire Water 64.9% overall

64.9%
As of 31 Jul 2026
66.5%
— / 2,902 Ml
As of 10 Aug 2026
72.4%
— / 4,639 Ml
As of 10 Aug 2026
61.5%
— / 1,671 Ml
As of 10 Aug 2026
48.7%
— / 3,307 Ml
As of 10 Aug 2026
53.7%
— / 2,200 Ml
As of 10 Aug 2026
23.6%
— / 1,943 Ml
As of 10 Aug 2026
75.8%
— / 2,968 Ml
As of 10 Aug 2026
100.0%
— / 137 Ml
As of 10 Aug 2026
72.1%
— / 3,374 Ml
As of 10 Aug 2026
68.9%
— / 367 Ml
As of 10 Aug 2026
41.6%
— / 4,937 Ml
As of 10 Aug 2026
38.4%
— / 1,243 Ml
As of 10 Aug 2026
54.8%
— / 1,725 Ml
As of 10 Aug 2026
58.3%
— / 22 Ml
As of 10 Aug 2026
94.7%
— / 982 Ml
As of 10 Aug 2026
52.0%
— / 2,049 Ml
As of 10 Aug 2026
53.8%
— / 276 Ml
As of 10 Aug 2026
94.9%
— / 240 Ml
As of 10 Aug 2026
99.7%
— / 438 Ml
As of 10 Aug 2026
37.5%
— / 752 Ml
As of 10 Aug 2026
68.3%
— / 3,443 Ml
As of 10 Aug 2026
60.3%
— / 7,010 Ml
As of 10 Aug 2026
95.0%
— / 723 Ml
As of 10 Aug 2026
49.4%
— / 3,814 Ml
As of 10 Aug 2026
49.7%
— / 1,214 Ml
As of 10 Aug 2026
96.4%
— / 1,716 Ml
As of 10 Aug 2026
94.6%
— / 443 Ml
As of 10 Aug 2026
49.4%
— / 1,365 Ml
As of 10 Aug 2026
61.6%
— / 21,764 Ml
As of 10 Aug 2026
100.0%
— / 335 Ml
As of 10 Aug 2026
67.1%
— / 1,229 Ml
As of 10 Aug 2026
74.5%
— / 347 Ml
As of 10 Aug 2026
41.8%
— / 5,492 Ml
As of 10 Aug 2026
51.5%
— / 4,955 Ml
As of 10 Aug 2026
54.5%
— / 1,235 Ml
As of 10 Aug 2026
51.3%
— / 381 Ml
As of 10 Aug 2026
57.5%
— / 1,877 Ml
As of 10 Aug 2026
60.2%
— / 451 Ml
As of 10 Aug 2026
36.1%
— / 974 Ml
As of 10 Aug 2026
85.5%
— / 37 Ml
As of 10 Aug 2026
82.8%
— / 891 Ml
As of 10 Aug 2026
56.3%
— / 324 Ml
As of 10 Aug 2026
54.0%
— / 628 Ml
As of 10 Aug 2026
33.0%
— / 769 Ml
As of 10 Aug 2026
28.9%
— / 1,382 Ml
As of 10 Aug 2026
36.0%
— / 469 Ml
As of 10 Aug 2026
43.2%
— / 190 Ml
As of 10 Aug 2026
84.8%
— / 991 Ml
As of 10 Aug 2026
87.3%
— / 616 Ml
As of 10 Aug 2026
65.1%
— / 200 Ml
As of 10 Aug 2026
67.4%
— / 2,446 Ml
As of 10 Aug 2026
60.9%
— / 851 Ml
As of 10 Aug 2026
65.3%
— / 7,420 Ml
As of 10 Aug 2026
46.1%
— / 9,414 Ml
As of 10 Aug 2026
39.2%
— / 892 Ml
As of 10 Aug 2026
62.1%
— / 165 Ml
As of 10 Aug 2026
47.4%
— / 1,923 Ml
As of 10 Aug 2026
73.9%
— / 406 Ml
As of 10 Aug 2026
49.9%
— / 4,655 Ml
As of 10 Aug 2026
62.4%
— / 702 Ml
As of 10 Aug 2026
88.7%
— / 948 Ml
As of 10 Aug 2026
69.5%
— / 7,894 Ml
As of 10 Aug 2026
62.8%
— / 1,063 Ml
As of 10 Aug 2026
73.8%
— / 862 Ml
As of 10 Aug 2026
52.6%
— / 913 Ml
As of 10 Aug 2026
54.2%
— / 839 Ml
As of 10 Aug 2026
75.8%
— / 153 Ml
As of 10 Aug 2026
46.6%
— / 359 Ml
As of 10 Aug 2026
25.1%
— / 324 Ml
As of 10 Aug 2026
91.1%
— / 168 Ml
As of 10 Aug 2026
31.3%
— / 2,771 Ml
As of 10 Aug 2026
55.2%
— / 597 Ml
As of 10 Aug 2026
63.0%
— / 7,590 Ml
As of 10 Aug 2026
41.4%
— / 1,467 Ml
As of 10 Aug 2026
38.9%
— / 416 Ml
As of 10 Aug 2026

South West Water

63.0%
820 Ml / 1,302 Ml
As of 9 Aug 2026
61.0%
803 Ml / 1,313 Ml
As of 9 Aug 2026
79.5%
— / 3,462 Ml
Last reported 31 May 2026
55.0%
2,329 Ml / 4,210 Ml
As of 9 Aug 2026
63.0%
155 Ml / 246 Ml
As of 9 Aug 2026
58.0%
16,628 Ml / 28,540 Ml
As of 9 Aug 2026
51.0%
517 Ml / 1,022 Ml
As of 9 Aug 2026
58.0%
694 Ml / 1,200 Ml
As of 9 Aug 2026
55.0%
967 Ml / 1,765 Ml
As of 9 Aug 2026
34.0%
684 Ml / 2,011 Ml
As of 9 Aug 2026
59.0%
1,795 Ml / 3,020 Ml
As of 9 Aug 2026
64.0%
22,093 Ml / 34,500 Ml
As of 9 Aug 2026
54.0%
1,702 Ml / 3,182 Ml
As of 9 Aug 2026
52.0%
2,557 Ml / 4,967 Ml
As of 9 Aug 2026
73.0%
1,083 Ml / 1,477 Ml
As of 9 Aug 2026
46.0%
340 Ml / 740 Ml
As of 9 Aug 2026
47.0%
9,922 Ml / 21,320 Ml
As of 9 Aug 2026
51.0%
786 Ml / 1,550 Ml
As of 9 Aug 2026

Hafren Dyfrdwy 53.1% overall

53.1%
As of 17 Aug 2026
25.0%
44 Ml / 176 Ml
As of 17 Aug 2026
48.4%
24,169 Ml / 49,936 Ml
As of 17 Aug 2026
61.8%
183 Ml / 296 Ml
As of 17 Aug 2026
85.1%
118 Ml / 139 Ml
As of 17 Aug 2026
0.0%
0 Ml / 103 Ml
As of 17 Aug 2026
100.0%
39 Ml / 39 Ml
As of 17 Aug 2026
48.1%
49 Ml / 102 Ml
As of 17 Aug 2026
54.8%
155 Ml / 283 Ml
As of 17 Aug 2026
58.4%
337 Ml / 578 Ml
As of 17 Aug 2026
55.8%
338 Ml / 606 Ml
As of 17 Aug 2026
48.9%
382 Ml / 782 Ml
As of 17 Aug 2026

Southern Water

66.8%
— / 31,400 Ml
As of 2 Aug 2026
52.8%
— / 4,730 Ml
As of 2 Aug 2026
33.0%
As of 2 Aug 2026
89.7%
— / 5,623 Ml
As of 2 Aug 2026

South Staffs Water

100.0%
— / 18,200 Ml
As of 3 Aug 2026

Wessex Water 58.0% overall

58.0%
As of 31 Jul 2026
100.0%
— / 48 Ml
Last reported 29 Jun 2026
68.0%
— / 5,662 Ml
Last reported 29 Jun 2026
79.3%
— / 934 Ml
Last reported 29 Jun 2026
76.5%
— / 866 Ml
Last reported 29 Jun 2026
79.9%
— / 125 Ml
Last reported 29 Jun 2026
84.8%
— / 555 Ml
Last reported 29 Jun 2026
100.0%
— / 192 Ml
Last reported 29 Jun 2026
79.8%
— / 2,134 Ml
Last reported 29 Jun 2026

SES Water

64.9%
— / 10,000 Ml
As of 18 Aug 2026

South East Water

55.7%
— / 5,206 Ml
As of 9 Aug 2026
67.2%
— / 3,546 Ml
As of 9 Aug 2026

Thames Water

92.0%
— / 2,505 Ml
As of 31 Jul 2026
London reservoirs Group total
74.0%
As of 31 Jul 2026
Lower Lee reservoirs Group total
82.0%
As of 31 Jul 2026
72.0%
As of 31 Jul 2026

Scottish Water 80.0% overall

80.0%
As of 10 Aug 2026
East Scotland Region
79.0%
As of 10 Aug 2026
83.0%
As of 10 Aug 2026
77.0%
As of 10 Aug 2026
West Scotland Region
82.0%
As of 10 Aug 2026

United Utilities 60.2% overall

Regional Total Company total
60.2%
-3.2%
As of 9 Aug 2026
Carlisle Group total
59.0%
+2.2%
As of 9 Aug 2026
66.5%
-3.2%
As of 9 Aug 2026
55.2%
-3.2%
As of 9 Aug 2026
Pennine Sources Group total
54.6%
-3.4%
As of 9 Aug 2026
Where this comes from. Reservoir data © the UK water companies, from their published reservoir-level reports and the Stream water-industry open data portal (CC BY 4.0). Thames Water London history via the London Datastore (Open Government Licence v2). Figures are exactly as published by each company — reporting day and rounding vary, so "as of" dates differ row to row. Levels older than 21 days are marked "last reported" rather than treated as current. Groups and regional totals are shown alongside (not on top of) their member reservoirs.
Reservoir facts (coordinates, capacity, type, purpose, construction date and downstream gauge) from the UK Reservoir Inventory. Contains data supplied by UK Centre for Ecology & Hydrology (Durant & Counsell, 2018, Open Government Licence v3.0).
Generated 2026-08-19 02:09 UTC.