Powdermill
Southern Water · 👁 47 views
31.5%
full
Where it is
Approximate location. Satellite imagery © Esri.
Level history
This time of year, in past years
| Year | % full (nearest reading) |
|---|---|
| 2025 | 44.6% |
| 2024 | 66.7% |
| 2023 | 38.7% |
| 2022 | 39.4% |
| 2021 | 51.3% |
| 2020 | 36.0% |
| 2019 | 52.9% |
| 2018 | 52.5% |
| 2017 | 78.0% |
| 2016 | 48.8% |
| 2015 | 84.4% |
| 2014 | 79.6% |
| 2013 | 70.5% |
| 2012 | 97.3% |
| 2011 | 46.5% |
| 2010 | 64.8% |
| 2009 | 46.5% |
| 2008 | 83.3% |
| 2007 | 66.7% |
| 2006 | 64.8% |
| 2005 | 42.0% |
| 2004 | 52.9% |
| 2003 | 33.7% |
| 2002 | 58.0% |
Nearest reading within 10 days either side of today's date, for each year on record.
El Niño 2026–27The tropical Pacific is running 3.3 °C above normal (week of 4–10 October 2026).What past El Niño winters brought Britain → Nearby river gauges
UDIAM GS
5.4 km
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 Southern Water — reporting day and
rounding vary. Levels older than 21 days are marked "last reported" rather than treated as current.