In recognition of the variability in risk posed by additional SW flow we have introduced a categorisation to define the various risk scenarios. This is intended both to provide clear advice to developers and allow Anglian Water to allocate our resources in proportion to the severity of risk posed.


The following scenarios are defined by the types of enquiry we can receive and the process for each will be more focused on the specifics of the application and tailored to give only relevant advice. The guidance offered in this section has been refined for each of the following new development surface water enquiry scenarios:

 

  1. No Point of Connection (POC) — Discharge to watercourse and / or infiltration
  2. No POC determined — No SW sewer available
  3. New surface area draining to an existing SW sewer
  4. New surface area draining to an existing FW sewer
  5. New surface area draining to an existing combined sewer
  6. Additional surface area draining to a SW sewer via an existing POC
  7. Changed surface area draining to a Combined via an existing
  8. Diverting existing surface drainage from an existing Combined POC to SW via a new SW POC
  9. Minor Applications — Developments of <½ hectare / <10 houses draining to an existing SW sewer
  10. Change of use, not entailing an increase in drainage surface area

 

If your development is not covered by any of the above scenarios we are unlikely to consider it to be sustainable. If this is the case please contact  planningliaison@anglianwater.co.uk

 

Your development may encompass more than one scenario; for example, your site may encompass both brownfield redevelopment and greenfield areas. Although we will generally take a holistic view in such cases, we would require you to commence the process, as far as possible by adopting the appropriate scenario for each portion of the development site to which it is relevant. Once the assessment of all of the different areas of the site is complete, we can consider the net impact of the development as a whole.


The format chosen for the scenario definitions above, intentionally sets out the risk posed to Anglian Water operations first, followed by the actions required by the developer and then the position we are likely to take in planning. Additional information, such as the requisition of infrastructure and adoptable standards, is added as appropriate to the scenario.