Publisher

Defra

4 layers on Open Index come from Department for Environment, Food & Rural Affairs. All under the Open Government Licence.

Layers

LayerLevel of detailCoversUpdatesLatest
Nitrogen dioxide (NO2)Defra1 km gridYearlyUpdated Oct 2026
Fine particles (PM2.5)Defra1 km gridYearlyUpdated Oct 2026
People in loud road or rail noiseWorked out by Open IndexMiddle areaOnce2021
Road and rail noise by postcodeDefra · Office for National StatisticsPostcodeQuarterlyUpdated Sep 2026

The sources, and how to credit them

Modelled background air pollution maps (1 km grid)
Published by
Department for Environment, Food & Rural Affairs
Licence
Open Government Licence 3.0
Edition
Background maps 2025 (CMAQ-Urban, 1 km)
Published
9 October 2026

Source: Defra, modelled background air pollution maps. Contains public sector information licensed under the Open Government Licence v3.0.

Used in nitrogen dioxide (no2) and fine particles (pm2.5).

Strategic noise mapping, Round 4 (England)
Published by
Department for Environment, Food & Rural Affairs
Licence
Open Government Licence 3.0
Edition
Strategic noise mapping Round 4 (2021), Lden
Published
8 December 2023

© Department for Environment, Food & Rural Affairs copyright and/or database right 2023. All rights reserved. Contains public sector information licensed under the Open Government Licence v3.0.

Used in people in loud road or rail noise and road and rail noise by postcode.