A New Appointment and Variations (NAVs) are companies that replace another water company as the appointee for an area and provide water and/or wastewater services to customers in a defined area. According to the Water Industry Act 1991, NAVs that operate the public water and/or wastewater networks hold an “Instrument of appointment”.
In order to become a NAV, your limited company will need to go through the process to be appointed by Ofwat, so that you can serve your customers in a specific geographical area.
Here are the conditions for a limited company to be granted the NAV status:
- The company must supply water and wastewater in the order of at least 50 megalitres per year.
- The site is ‘unserved’, meaning no premises within the area are served by an appointed company. This criterion applies for both water and wastewater services.
- If the existing appointed company consents to the transfer of that area.
Developers can request that a New Appointment and Variation (NAV or "New appointee") supplies water and/or wastewater services to their development
If you choose to work with a NAV to supply water and/or wastewater services, they will adopt, own and maintain your development network. It means as a Developer you can choose who supplies your development site and allows you to choose a NAV to replace us as the incumbent for a specific geographical area. In order to choose a NAV to service your site you must meet the criteria set out by Ofwat.
A NAV can choose to service its customers through its own resources, or by requesting use of our existing assets under a water ‘bulk supply’ or wastewater ‘bulk discharge’ agreement.
To find out more about using a NAV, visit Ofwat’s website.
The statement of NAV Charging Arrangements is published by Southern Water Services Limited as a wholesale supplier and shall come into operation from 1 April 2022 to 31 March 2023 inclusive.
These charging arrangements shall apply in respect of the supply of bulk services provided at a NAV Site to an appointed water and/or sewerage undertaker.
To review our charges from 1 April 2022 please see below documents.
To review our charges from 1 April 2023 please see below documents.
Below is a guide on what a NAV will need to do when making a bulk supply or discharge application.
Don't worry, we’ll be in touch along the way to make sure everything goes smoothly
NAV clean water
Our policies relating to NAVs can be found at handbook and documents.
Get in touch
For general enquiries not related to a submitted NAV application or questions on NAV sites outside the application/connection process, please email us at [email protected].
You can track and manage your application via the GetConnected online portal.
Still have questions? We are here to help
We understand that all projects are different, and it might be hard to understand what the right and most cost-effective option is. Please visit our Frequently Asked Questions page for more guidance or simply request a call back from our helpful team.
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