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Search any UK location to identify the water and sewerage company operational boundary covering a site.
Updated: periodically as source data is republished · Last checked by Maplify: July 2026
This layer maps the operational boundaries of water and sewerage companies across England, shown as shaded polygons. Each boundary indicates which company is responsible for water supply and wastewater services in that area.
It is the starting point for confirming who to contact for a formal connection and capacity assessment before servicing a new development.
Water and sewerage capacity is a practical constraint for almost every development, and confirming which company serves a site is the first step before any formal capacity or connection enquiry. Developers and environmental consultants check this layer early in feasibility work.
Shaded boundary
Operational area of the water and sewerage company serving that region.
Confirming that adequate water and sewerage capacity exists — or can be provided — is standard due diligence before a planning application is submitted, and the relevant water company should be consulted formally rather than relying on mapped boundaries alone.
Identify the water and sewerage company serving the site.
Contact that company to confirm formal connection and capacity requirements.
Check the Treatment Works and Storm Overflows layers for the same site for the fuller picture.
This is general guidance, not professional or legal advice — confirm specifics with the relevant authority or a qualified professional.
Property Developers
Identify the correct water company to approach for a capacity assessment.
Environmental Consultants
Scope water and sewerage infrastructure enquiries.
Planning Consultants
Advise on likely conditions relating to servicing.
Water company checks are commonly run alongside these related layers.
What does the Water Company Areas layer show?
The operational boundary of the water and sewerage company responsible for supply and wastewater services in each area of England.
Why do developers check water company boundaries?
Knowing which water company serves a site is the first step to confirming formal connection and capacity requirements before submitting a planning application.
Does this show whether a site can connect to mains water and sewerage?
No, it shows which company serves the area. A formal capacity and connection assessment must be obtained directly from that water company.
How often are water company boundaries updated?
Data is sourced from Environment Agency and water company published datasets and is checked periodically as new extracts are published.
Open the map, generate a site report or save your search to come back to it later.
| Provider | Environment Agency / Water Companies |
| Geometry type | Polygon |
| Coverage | England |
| Update schedule | Periodic check against published extracts |
| Reference date | July 2026 |
| Licence | Open Government Licence v3.0 |
