Compass Group UK & Ireland has provided more than 66,000 people in developing countries with clean drinking water.
The company has completed 44 projects by donating wells to communities in India and Uganda, through its partnership with Life Water and associated charity drop4drop.
Dennis Hogan, managing director of Compass Group UK & Ireland, said: "It's quite a milestone for Compass, which employs over 60,000 people, to be providing a similar number of people in Uganda and India with clean drinking water.
"We are extremely proud of this achievement as we have helped to make an extraordinary difference to communities in need through our partnership with Life Water."
Charlotte Fennell, national accounts and marketing manager at Life Water, added: "We are very happy that Compass Group UK & Ireland decided to partner with us for their water supply.
"Each month, Compass Group UK & Ireland continues to fund more projects, and I think it's amazing to see how a simple purchasing decision can have such a long lasting positive impact on the lives of many."
Compass has signed a three-year contact with Life Water to be the primary bottled supplier across its organisation. For every bottle it sells, at least 1,000 litres of clean drinking water is provided to a community in need.