Accessing our data

We want to make access to our data as easy and transparent as possible to achieve maximum re-use

Coronavirus update

Our staff are now home working wherever possible. This means we can't accept paper application forms at this time. You will be able to submit forms via email.

You will need Microsoft Word 2010 or equivalent to be able to use the electronic forms.

Whilst we hope to keep disruption to a minimum, please be aware there may be a longer processing time during this period of transition.

Find out more about our response to coronavirus.

We have two data categories:

Open Data

is free data that anyone can view, re-use or re-publish provided that the original source is attributed. We make this data available under the Open Government Licence (OGL).

We are continuously publishing more of our data as Open Data to benefit our customers, the environment and economy.

Sensitive data

For some data, we have to restrict access due to data protection, legal or other reasons. These data are available under a conditional data licence.

Where data are third party owned, customers are advised to request these directly from the data originator.

Lle Geo-Portal

You can download our published Open Data from Lle Geoportal. Some data can also be viewed on the Lle Map browser.

‘Lle’ means ‘place’ in the Welsh language and is a hub for data and information related to Wales and the environment. It is a partnership between Welsh Government and NRW.

Keep up with the latest published data on Lle Geo-Portal by subscribing to our RSS feeds.

NBN Atlas Wales

We publish most of our ecology data, such as species and habitats, on the NBN Atlas Wales.

‘NRW ecological data exempt from general release under EIR’ explains why some data are only available under a conditional data licence.

Please refer to the NBN Atlas Video tutorials if you are a first time user of the site.

Map viewers

You can view selected data on our map viewers, such as river levels. Please use the flood risk map viewer to check your long-term risk of flooding from rivers and sea, surface water and reservoirs. Data can also be viewed on the Lle Map browser.

National River Flow Archive

River flow data are available on the National River Flow Archive. If any Wales data you require are not available on this website please contact:

Please let us know the time period and level of detail required (eg daily totals) when you make the request.

Live data API portal

Data developers can download our Open Data APIs from the Natural Resources Wales API Portal.

Current available API data sets 

  • Flood Risk Forecast API (Open Data) - gives the indication of the potential for flooding for three days: the day on which it is issued and the subsequent two days ahead
  • Live Flood Warnings and Alerts API (Open Data) - provides a list of all current warnings in force and is updated every 15 minutes
  • River Levels API (Open Data) - provides information on river levels at our measurement stations across Wales

Flood data products including flood models

These are typically requested for use in Flood Risk Assessments or Flood Consequence Assessments. We can also provide Flood Risk Reports for insurance purposes. Please contact for bespoke data, models and reports. Raw data is available from Lle Geo-Portal: NRW open flood data.

How to search for available data and find out if data is open or sensitive

Please use our library catalogue. Select the search box on the left hand menu and click onto ‘dataset titles’. 

How we share sensitive data

These data are available under a licence that will specify conditions for re-use.

Apply for a re-use licence to access sensitive data

Complete a data licence request form and email to

Licencing and supply of data that are not available online may take up to 20 working days. 

Contact us

Related document downloads

Data request form WORD [158.3 KB]