Overview
Model simple what-if scenarios. OS Open Rivers lets you answer questions like ‘which rivers would be affected by a toxic discharge from this site?’
For sharing water quality data, this is ideal. OS Open Rivers lets you tag information with the river IDs used by environment agencies so everybody can use it.
Save money and benefit from simple licensing terms. OS Open Rivers is free to view, download and use for commercial, education and personal purposes.

OS Open Rivers
OS Open Rivers GIS data contains over 144,000 km of water bodies and watercourses map data. These include freshwater rivers, tidal estuaries and canals.

Need more detail?
If you need more information about watercourses, we recommend OS MasterMap Water Network Layer.
How to get this product
Our open data products are covered by the Open Government Licence (OGL), which allows you to:
- copy, distribute and transmit the data;
- adapt the data; and
- exploit the data commercially, whether by sub-licensing it, combining it with other data, or including it in your own product or application.
We simply ask that you acknowledge the copyright and the source of the data by including the following attribution statement:
- Contains OS data © Crown copyright and database right 2021
- Where you use Code-Point Open data, you must also use the following attribution statements:
- Contains Royal Mail data © Royal Mail copyright and Database right 2021
- Contains National Statistics data © Crown copyright and database right 2021
Case studies

GIS improves Wiltshire flood management
Wiltshire have combined local knowledge with Ordnance Survey mapping to analyse local flood impacts and risks in Dauntsey Parish.
Technical specification
Key Features | What this product offers |
---|---|
Format | Vector Tiles, GeoPackage, GML 3.2, Esri Shape file |
Data structure | Vector points and lines |
Attributes | Watercourse name; watercourse type; direction of water flow |
Scale | 1:15 000 to 1:30 000 |
Update frequency | Twice a year – April and October |
Supply | Download only |
Coverage | Great Britain |