Publisher

Defra

2 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

The source, and how to credit it

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).