The restrictions will commence from 9am on Monday, following the driest UK spring in decades.
Millions of households are already facing water restrictions, with similar bans implemented or announced by other utility firms like Yorkshire and Thames Water.
Reservoir levels across England are critically low at 75.6 per cent, with some areas like Yorkshire at 53.8 per cent.
The Environment Agency has warned of further bans, as drought status has been declared in several English regions, including the East and West Midlands.