💧 UK reservoir levels
How full are the reservoirs that supply our tap water — company by company, updated as each publishes.
50.7%
full on average, based on 124 reservoirs and groups across 8 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.
Severn Trent Water 50.9% overall12 Oct 2026
Yorkshire Water 45.5% overall30 Sep 2026
Hafren Dyfrdwy 47.9% overall12 Oct 2026
South Staffs Water
Wessex Water 25.0% overall12 Oct 2026
SES Water
Scottish Water 81.0% overall12 Oct 2026
United Utilities 54.7% overall11 Oct 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.
Anglian Water source →
Dŵr Cymru Welsh Water source →
Hafren Dyfrdwy source →
Northumbrian Water source →
Scottish Water source →
SES Water source →
Severn Trent Water source →
South East Water source →
South Staffs Water source →
South West Water source →
Southern Water source →
Thames Water source →
United Utilities source →
Wessex Water source →
Yorkshire Water source →
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 2026-10-16 03:20 UTC.