Reservoir storage levels

Up to date information about our current reservoir storage levels.

Find out where your water comes from

Latest reservoir storage levels

Bristol Water operates four major reservoirs – Chew Valley Lake, Blagdon Lake, Cheddar and Barrow. These are the current levels of our largest reservoirs as of 04/11/2026.

The total reservoir storage for the Bristol Water area is at 43%. On the same date in 2025, storage was at 35%.

Cheddar Reservoir

04/11/2026 Cheddar reservoir storage is at 39%. On the same date in 2025, storage was at 42%.

Chew Valley Lake

04/11/2026 Chew Valley Lake reservoir storage is at 39%. On the same date in 2025, storage was at 34%.

Blagdon Lake

04/11/2026 Blagdon Lake reservoir storage is at 46%. On the same date in 2025, storage was at 29%.

Monitoring and managing our supplies

Water is a precious resource and we encourage our customers to use it wisely, whatever the weather.

Thanks to our forward planning and the flexibility in our water network, we can balance our stored resources in a way that helps us manage supplies during drier periods. We also use artificial intelligence to manage our supplies in a way that cuts our energy use too, helping our environmental performance.

Plumbing and drainage cover

Trust HomeServe’s plumbing and drainage cover, just 50p a month in the first year.

*50p a month in year 1 with £30 excess. New customers, homeowners only. T&Cs apply.

Get covered with HomeServe