Three major water business plans from Severn Trent, South West Water and United Utilities have been approved.
Water regulator Ofwat green lit the plans for 2020-25 after an initial assessment.
Each company's plans outline how they will cut bills by up to £70 while significantly improving support for vulnerable customers, and succeed in cutting leakage.
Ofwat has urged the remaining water companies to strengthen their plans.
Ofwat Chief Executive, Rachel Fletcher said: "We have challenged all water companies to deliver more for less for customers over the next five years.
"They've listened to the customers they serve. We're seeing an increased focus on the things closest to people's hearts such as keeping bills affordable, cutting leakage, protecting the environment and helping those most in need. Three companies have already stepped up to the mark with high quality plans and stretching commitments to customers for the next five years. The rest of the sector now needs to meet this high standard so that customers across the country get better and more efficient services."
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