South West Water reservoir levels
35.4%
full — our estimate across 17 reservoirs and groups, weighted by capacity where published, to 27 Sep 2026. South West Water does not publish a single company-wide figure.
How South West Water has changed
Last 12 months, weighted by capacity where published.
Every South West Water reservoir we track
Compare with
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 South West Water — reporting day and
rounding are theirs, so "as of" dates differ row to row. Levels older than 21 days are marked
"last reported" rather than treated as current.
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).