COVID 19 UPDATE
Find out the latest for the water industry
We regulate the water sector in England and Wales
This section of the website sets out how we will work with others for the benefit of customers of water and wastewater services and wider society in England and Wales both now and in the future.
In this section you can find information for and about the water companies we regulate.
In this section of the website you can find information about water and sewerage supply to household consumers.
In this section of the website you can find information about water and sewerage supply to businesses, charities and public sector organisations.
In this section you can find information for investors in water companies.
Home > Publications > PR19 final determinations: Securing cost efficiency technical appendix
16th December, 2019
Final Determinations / PR19
Updated version of document published 30 April 2020.