Anglian Water is expected to lift the hosepipe ban which has been in place across Northamptonshire since April.
It is one of three companies which will announce the end of the restrictions which will be lifted today.
Seven water companies across southern and eastern England brought in hosepipe bans to combat drought, after two unusually dry winters left groundwater supplies and rivers as low as in the drought year of 1976.
A spokesman for Anglian Water said the decision had been made because of a combination of factors combining to ease pressure on the water system.
He said: “It’s been because of supply and demand, it has recharged.
“It also is because we have had such a cold, wet May and June following a wet April, which means demand has been suppressed.”
Anglian Water is joined by Thames Water and Southern Water which are also lifting bans.
The news came as heavy downpours battered Britain, with forecasters warning they are set to continue through the rest of the week.
South Wales, the south of England and Northern Ireland all saw heavy showers yesterday and temperatures struggled to get above 14C.
In its latest drought briefing last week, the Environment Agency said the wet weather had significantly reduced the risk of drought and widespread water restrictions this summer.
River levels and reservoir stocks have improved significantly and further water restrictions for the public and businesses are unlikely, the government agency said.
Thames Water said at the time unless the weather takes “an unexpectedly Saharan twist”, it no longer expected to keep the ban in place through to the autumn.
South East Water, Sutton and East Surrey Water, Veolia Water Central and Veolia Water Southeast have hosepipe bans remaining in place. South East Water said today its ban would remain in place. The others were unavailable for comment.