Local water information for Britain
Know the water where you live.
Enter your postcode to see who supplies your water, whether any restrictions apply and what local water levels may do next.
Already using Otter? Sign in or open your account
National picture
Water-supply areas, not county lines.
Water companies manage their supplies in local areas that often cross council and county boundaries. Choose Forecasts to see the areas where a local water forecast is available. Some small independent suppliers and parts of Scotland still lack detailed public boundaries.
Marker key
Source
Reservoir / storage
Treatment works
Pump / transfer
Supplied areaMap layers5/6
See which water-company areas have forecasts, which are partly covered and what information is still missing.
See where forecasts are availableWhere forecasts are available
We say when we don’t know.
The postcode checker and official restriction map work across England. Local forecasts are available only where we have enough reliable reservoir, groundwater or river data. We label partial coverage clearly and explain what is missing elsewhere.
In useUsed for live results
33Public previewVisible with an early-data warning
9Not connectedKnown source, not running yet
3Being reviewedUse and access still being checked
3Cannot be usedAccess or usage rules prevent it
0Historical reservoir data
Past water levels rebuilt from official reports.
We no longer use the withdrawn UKCEH history. Instead, we rebuild past reservoir levels from Environment Agency reports and combine them with current water-company readings. A forecast is shown only after it performs well against past data. Yorkshire uses its own separately licensed public feed.
Free public preview
Check freely. No signup required.
You can use the postcode checker and inspect every source without creating an account. Email updates are not available yet.
Official water-company notices always take priority. Forecasts appear only in the areas their data actually covers.
Check a postcode