IWNL provides water and sewerage services to both residential and business customers on new-build housing developments across the UK, with a primary focus on customer service.
Water UK said as the water industry changes, and with business customers due to have a choice of supplier from April 2017, it aims to “reflect and represent the full diversity of the industry as it evolves”.
The group’s chief executive Pamela Taylor said: “Our membership now comprises all the main UK water undertakers and insets and demonstrates that we are open to all companies in the industry, whether they are large established names or sector specialists.
“The inclusion of IWNL into our membership will bring different perspectives and new ideas, while they will benefit from working in closer partnership with our existing members.”
IWNL general manager Edward Attree said: “Being a member of Water UK will assist IWNL not only to develop existing policies but also to explore new initiatives with the wider Water UK members whose focus is on customers, water quality and improving the water industry’s future.”