Gloucester City Council has a duty to monitor local air quality and to take action where local air pollutants exceed objectives as set out in the UK's National Air Quality Objectives . These objectives define maximum limits for different pollutants which are intended to safeguard public health.
Local air pollution is mainly caused by human activities that involve the burning of fossil fuels – including vehicle journeys.
How do we monitor air quality?
We monitor local air quality in Gloucester using a network of passive diffusion tube samplers at a number of locations across the City.
Diffusion tubes look similar to test tubes and give an indication of average pollution levels for the year. They indicate where more work may be needed to assess local air pollution, for example when the data show the mean objectives for a particular pollutant are being exceeded.
The location of diffusion tubes and results of air monitoring are included in the most recent annual air quality report (please see below). It is important to get a mixture of data from both roadside and background locations to provide a good overall picture of air quality in Gloucester.
The diffusion tube data helps Gloucester monitor whether the government's annual air quality objective for nitrogen dioxide (annual average maximum of 40 micrograms per cubic metre) is being met. These objectives are exceeded only where they affect "local receptors" - for example places where people live, work or go to school.
Three Air Quality Management Areas (AQMAs) have been declared in Gloucester due to exceedences of the annual mean objective for NO2: Barton Street AQMA (in the City centre) and Priory Road AQMA (on the A417), both declared in 2005; and Painswick Road AQMA (extension of Barton Street), declared in 2007.
If you would like more information regarding air quality please email.
Gloucester City Air Quality Annual Status Report 2024
Gloucester City Air Quality Annual Status Report 2023 (PDF, 1.4 MB)
Gloucester City Air Quality Annual Status Report 2022 (PDF, 2 MB)
Gloucester City Air Quality Annual Status Report 2021 (PDF, 1.9 MB)
Gloucester City Air Quality Annual Status Report 2020 (PDF, 1.9 MB)
Gloucester City Air Quality Annual Status Report 2019 (PDF, 2.1 MB)
Gloucester City Air Quality Annual Status Report 2018 (PDF, 1.9 MB)
Gloucester City Air Quality Annual Status Report 2017 (PDF, 2.2 MB)
Updating and Screening Assessment 2015 (PDF, 1.2 MB)
Gloucester City Council Local Air Quality Management Progress 2014 (PDF, 5.3 MB)
Air Quality and Screening Assessment for Gloucester City Council 2012 (PDF, 1.9 MB)
Gloucester City Progress Report 2011 (PDF, 2.6 MB)
Gloucester City Air Quality Action Plan 2008 (2011 review) (PDF, 730 KB)
Myers Road Detailed Air Quality Assessment 2010 (PDF, 964.8 KB)
Gloucester City Progress Report 2010 (PDF, 1.6 MB)
Air Quality and Screening Assessment for Gloucester City Council 2009 (PDF, 1.2 MB)
Does the city have an air quality problem?
Gloucester City has been monitoring air quality in the Borough for several years in line with the 1995 Environment Act. The Act imposes a duty on local authorities to assess the level of certain air pollutants and take action where these levels exceed the national objectives set by the Government.
Full details of the objectives and the deadlines for achieving them can be found on the Air-UK website.
Our ongoing programme of monitoring and assessment showed that levels of one of these key pollutants - nitrogen dioxide (NO2) - was exceeding one of the Government's objectives in three locations in Gloucester.
This led to the declaration of three Air Quality Management Areas (AQMAs) in Barton Street, Priory Road and Painswick Road.
However the majority of monitoring locations have seen the annual mean NO2 concentration decrease since 2013 which we believe in part is due to new vehicle technology i.e. cleaner vehicles and start/ stop technology etc.