What is a New Appointment and Variation (NAV)?

Infographic showing two rows of houses connecting to a water network further away.

A new appointment is made when a company is appointed by Ofwat to provide a water and/or sewerage service to customers in an area which was previously provided by the incumbent regional water provider.

IWNL is appointed by Ofwat, on a site-by-site basis, to provide water and/or wastewater services; this is known as a New Appointment and Variation (NAV). IWNL own and operate the water and wastewater network in these areas, providing services to customers including supply of water, wastewater services, metering, and billing. IWNL has all the same duties and responsibilities as the previous statutory water company.

Other ways we can help

Open Water Market

We understand that we have customers with vulnerabilities, so we have developed a range of free services to help make it easier for them.

Keeping Our Sewers Clear

Preventing blockages in your pipes is easy. View our helpful tips and advice on what to avoid flushing.

Business Sewerage – Trade Effluent

We need to ensure that our infrastructure and treatment processes work effectively, so that your treated wastewater can be returned safely back into the environment.