Welcome to Swansea Air Quality Data
Your online resource for near real-time air quality and meteorological data in Swansea. Quickly check site summaries, live pollutant levels, and historical data. Use the quick links below or explore our station map.
Monitoring Station Map
Monitoring stations
Swansea's monitoring stations, including both air quality and meteorological units, play a crucial role in assessing daily air quality. With a range from low to very high, the daily air quality index reflects the city's environmental conditions.
The air quality hub website offers insights into annual air quality totals. These stations provide current readings and details on measured pollutants, contributing significantly to informed decision-making in local air quality management.
Summary Data For All Sites
For a quick overview of all monitored sites, click below.
Important Notices & Historical Data
Savings / Analyzers Switched Off
As of 1 April 2010, all carbon monoxide, sulphur dioxide, and hydrogen sulphide analysers at the Swansea AURN and Morriston Groundhog sites were deactivated to reduce operational costs. However, sulphur dioxide measurements continue at the St Thomas DOAS monitoring station. If you require historical data for these pollutants, please email pollution@swansea.gov.uk.
Morfa Groundhog Site Decommissioning
In May 2010, the Morfa Groundhog monitoring site was decommissioned. Historical data from this site remains available upon request. If you would like access to archived measurements, please email pollution@swansea.gov.uk.
Requesting Historical Data
If you need historical pollution or meteorological data in any format (e.g., CSV or PDF), please contact us at pollution@swansea.gov.uk. To ensure our messages reach your inbox, add info.swansea.airqualitydata.com to your email system’s whitelist. Otherwise, replies may end up in your junk or spam folder.
New Meteorological Monitoring Station
In May 2010, a new meteorological monitoring station—Swansea Bay—was established just 20 meters from the foreshore at Blackpill. This station provides high-quality data to support an EU-funded study on Swansea Bay’s bathing water quality. For more information about this monitoring station and its data, please email pollution@swansea.gov.uk.
FDMS Replacement at Morriston Groundhog
Due to ongoing data quality concerns, the PM10 FDMS unit at the Morriston Groundhog location was removed and replaced with a MetOne BAM1020 PM2.5 monitor. The new equipment began delivering valid data at 14:00 on 14 January 2016. If you require detailed information or historical PM10/PM2.5 data from this site, please get in touch.
Real-time NOx Measurements
Real-time NOx monitoring commenced on 20 June 2014 at 07:15 GMT from a station outside Station Court on High Street in Swansea. This data stream will be integrated into our website as soon as possible. In the meantime, you can view the data on the Welsh Air Quality Forum website, or email pollution@swansea.gov.uk if you need the raw datasets.
An easy-to-understand, symbol-driven navigation system (visible to the right) helps you locate key data and features for each site quickly. In addition, new feeds—such as the AQ500 SODAR (wind profiler)—are now live and accessible below the station listings.
Continuous Monitoring Program
Swansea has maintained an automatic, continuous air quality monitoring program since 1994, collecting near real-time data across multiple stations.
NO₂ Diffusion Tubes Online
All passive nitrogen dioxide diffusion tube measurements—both current (active) and historic (greyed out)—are now published online. Please refer to the relevant bias correction factor for the year of interest.
Air Quality Management Area
In August 2010, the City & County of Swansea declared the Swansea Air Quality Management Area (AQMA), covering Hafod, Sketty, and Fforestfach.
Report a pollution problem
You can let us know about a problem with noise, water, land or air pollution. The first thing you should do is speak to the person or business who is causing the nuisance. They may not realise there is a problem and will often help.
