FOI REF: FOI/2023/5011

You asked

Can you please provide me with a list of postcodes that do not have mains sewerage connections - that is properties with septic tanks or sewage treatment plants.

Alternatively, please supply a list of postcodes for properties with mains sewage connections.

We said

Thank you for your enquiry. 

Unfortunately, we do not hold this information. 

As the water regulator for England and Wales, Ofwat holds information on sewerage services areas. The geographical area data can be found here: Constituency information: Water companies (parliament.uk).

Alternatively, the Environment Agency is England's executive non-departmental public body for environmental protection and enhancement. It collects data on waste operations and wastewater treatment in England. You can find out more about the data collected by the Environment Agency here: Environment Agency - GOV.UK (www.gov.uk).