Bath Air Quality Management Area
An Air Quality Management Area (AQMA) was first declared in Bath in 2002. The AQMA has expanded since then, most recently in 2013.
The current AQMA covers most of the principal road network in central Bath and is valid for both the annual and hourly average objectives.
The area is shown in red on the map.
Bath Air Quality Action Plan
An Air Quality Action Plan to identify actions to reduce NO2 levels was adopted in February 2011.
This is due to be updated and a three month consultation period for an updated Bath Air Quality Action Plan ended on the 3rd December 2017. The full Consultation Draft Bath Air Quality Action Plan document is available here or on the right hand side in the 'documents' section.
The measures assessed, and responses from the consultation have been fed into the Bath Clean Air Plan project. The aim of the Bath Clean Air Plan is to achieve compliance with Nitrogen Dioxide levels by 2021 at the latest. To take urgent action, we are proposing a Clean Air Zone (CAZ) for Bath.
To find out more about the Bath Clean Air Plan and the CAZ please visit our Bath Breathes 2021 website.
The final Bath Air Quality Action Plan will be developed and implemented in co-ordination with the Bath Clean Air Plan.
Engine emissions of oxides of nitrogen (NOx) by vehicle type
Over 90% of oxides of nitrogen (NOx) emissions in Bath are from road traffic. The Nitrogen Dioxide that we measure at the roadside is from these NOx emissions and a chemical reaction that occurs after leaving the exhaust pipe.
The amount each vehicle type contributes to NOx emissions in selected areas is estimated below in the source apportionment illustration.