Air quality monitoring
Find out how we are managing levels of air pollution in our borough.
Air pollution is linked to health problems and those most at risk are the young, the elderly and people who have asthma or heart or lung diseases.
For this reason, we regularly check air quality in our borough to make sure pollutants, such as Nitrogen dioxide (NO2) do not exceed the
Road traffic is our main pollutant
Air quality in Guildford is generally good and meets the National Air Quality Standard for NO2. However, road traffic is a significant cause of air pollution in the borough and there is a risk that NO2 levels may go above the acceptable national standards.
Blackwater Valley Group
Guildford Borough Council, Surrey Heath Borough Council, Rushmoor Borough Council, Surrey County Council and Hampshire County Council are working together to reduce roadside nitrogen dioxide concentrations on the A331 between the A31 and M3. Find out how the group is taking action by visiting the Blackwater Valley Group website.
To measure NO2 levels, diffusion tubes are located at 31 different locations.
Diffusion tubes are left at sites for a month, then analysed to give the average concentration of NO2 for that month.
The monthly results are averaged over 12 months to give an annual mean result.
View results from our monitoring:
comparison ofThree sites exceed the national standard for NO2 but two of these are not in proximity to residential properties. The third site is currently under assessment (please see our for more information.)
See the Downloads section for 2017 Annual monitoring result, with raw and bias corrected annual average.
Air Quality Reports from 2012 to 2018 (see Downloads).
Air quality duties
Our duties to monitor air quality in the borough are set out by the Environment Act 1995, European Union Directives and the UK's Air Quality Strategy.
If air quality in the borough does not meet the national standard, we will draw up an Air Quality Management Area (AQMA) and draft an action plan to improve the air quality in that area.
Tackling air quality
We are working hard to improve air quality in our borough with projects such as:
a Town centre Transport Package which aims to make it easier for people to get around the town centre on foot, by bicycle, and public transport
electric charging points being added in public car parks
a sustainable parking strategy, which is at a draft stage and will improve congestion and help use of electric and low emission vehicles.
How you can help
We are asking businesses and residents to help improve our borough's air quality, for example by:
- choosing a sustainable travel option using public transport, park and ride, walking, cycling, car clubs, or car sharing
using cleaner, ultra low emission vehicles
avoiding burning garden waste on bonfires. Join our garden waste scheme instead
following smoke control guidelines and using authorised appliances and fuel choices
turning off car engines when you are stationary.
- Air Quality Annual Status Report [3.45MB]
- Air Quality Report 2017 [1.93MB]
- Air Quality Report 2012 [335.23KB]
- Air Quality Report 2011 [949.24KB]
- Air Quality Report 2010 [1.72MB]
- NO2 Monitoring data 2019. (Please note: these results can't be used for interpretation until an annual average has been calculated and a bias adjustment made) [22.12KB]
- NO2 Monitoring data 2018 [29.54KB]
- NO2 diffusion tube sites January 2018 [25.34KB]
- Air quality management area order 1 February 2018 Compton [73.89KB]
- Detailed Assessment and Action Plan for Compton [1.46MB]
- Air Quality Strategy [120.85KB]
- 2017 Annual monitoring result, with raw and bias corrected annual average [16.01KB]