Northumbrian Water Limited supplies 2.7 million customers in the North East with both water and sewerage services, trading as Northumbrian Water.

In 2023, Northumbrian Water Group was named the world's most ethical water company for the 13th time and was recognised in the 2024 list of the UK’s Best Workplaces (Super Large) by the Great Places to Work Institute and awarded Centre of Excellence in Wellbeing status.