It's great news as the company reach this milestone for the first time.
Mary Haviland, Head of Customer Services, said:
“We are delighted that our customers are recognising Castle Water’s commitment to customer service.
With new initiatives and systems, including the opportunity for customers to complete a short survey after any phone call, email or webchat, we will be able to improve our service still further in 2020.”
Take a look at the latest Castle Water reviews here.