In-period determinations for 2021-22

On 3 October 2022, we published our in-period outcome delivery incentives draft determinations for 2021-22, including a sector-wide report, confirming the payments due to companies or customers as a result of water company performance against their 2021-22 performance commitments. Overall, £53m will be repaid to customers. The payments will affect the amount of revenue companies can recover from customers through 2023-24 bills.

The largest outperformance payment will be to Severn Trent Water, which will receive £63m. Thames Water and Southern Water will return £51m and £28m to their customers respectively.

For Severn Trent Water we have agreed to defer some ODI payments.

We analyse and compare water company performance through publications such as our Service Delivery Report and Financial Monitoring Report, both of which are due to be published before the end of 2022.

Company Consultation on our draft in-period ODI determination Consultation response Final in-period ODI determination
Sector-wide report Sector-wide report – Draft determination 2021-22 Sector-wide responses Sector-wide report – Final determination publication
Affinity Water Affinity Water – Draft determination 2021-22 Affinity Water – responses Affinity Water – Final determination publication and models
Anglian Water Anglian Water – Draft determination 2021-22 Anglian Water – responses Anglian Water – Final determination publication and final models
Bristol Water Bristol Water – Draft determination 2021-22 Bristol Water – responses Bristol Water – Final determination publication and

 final models

Dŵr Cymru Dŵr Cymru – Draft determination 2021-22 Dŵr Cymru – responses Dŵr Cymru – Final determination publication and  final models
Hafren Dyfrdwy Hafren Dyfrdwy – Draft determination 2021-22 Hafren Dyfrdwy – responses Hafren Dyfrdwy – Final determination publication and final models
Northumbrian Water Northumbrian Water – Draft determination 2021-22 Northumbrian Water – responses Northumbrian Water – Final determination publication and final models
Portsmouth Water Portsmouth Water – Draft determination 2021-22 Portsmouth Water – responses Portsmouth Water – Final determination publication and final models
SES Water SES Water – Draft determination 2021-22 SES Water – responses SES Water – Final determination publication and final models
Severn Trent Water Severn Trent  – Draft determination 2021-22 Severn Trent Water – responses Severn Trent Water – Final determination publication and final models
South East Water South East Water – Draft determination 2021-22 South East Water – responses South East Water – Final determination publication and final models
South Staffs Water South Staffs Water – Draft determination 2021-22 South Staffs Water – responses South Staffs Water – Final determination publication and final models
South West Water South West Water – Draft determination 2021-22 South West Water – responses South West Water – Final determination publication and final models
Southern Water Southern Water – Draft determination 2021-22 Southern Water – responses Southern Water – Final determination publication and final models
Thames Water Thames Water – Draft determination 2021-22 Thames Water – responses Thames Water – Final determination publication and final models
United Utilities United Utilities – Draft determination 2021-22 United Utilities – responses United Utilities – Final determination publication and final models
Wessex Water Wessex Water – Draft determination 2021-22 Wessex Water – responses Wessex Water – Final determination publication

and final models

Yorkshire Water Yorkshire Water – Draft determination 2021-22 Yorkshire Water – responses Yorkshire Water – Final determination publcation and final models

C-MeX model

D-MeX model