Research and analysis

Air quality compliance assessment 2025: results and data tables

Data used in the 'Air pollution in the UK 2025' report, which presents the results of the UK’s compliance assessment against the Air Quality Standards Regulations (2010).

• From: Department for Environment, Food & Rural Affairs
• Published: 9 October 2026

Documents

Air Pollution in the UK: Compliance Assessment Data for Arsenic

ODS, 6.97 MB

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Air Pollution in the UK: Compliance Assessment Data for Benzo[a]pyrene

ODS, 6.69 MB

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Air Pollution in the UK: Compliance Assessment Data for Benzene

ODS, 6.57 MB

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Air Pollution in the UK: Compliance Assessment Data for Cadmium

ODS, 6.5 MB

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Air Pollution in the UK: Compliance Assessment Data for Carbon Monoxide

ODS, 6.54 MB

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Air Pollution in the UK: Compliance Assessment Data for Lead

ODS, 7.13 MB

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Air Pollution in the UK: Monitoring Obligation Pollutants

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Air Pollution in the UK: Compliance Assessment Data for Nickel

ODS, 7.27 MB

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Air Pollution in the UK: Compliance Assessment Data for Nitrogen Dioxide

ODS, 8.6 MB

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Air Pollution in the UK: Compliance Assessment Data for Nitrogen Oxides

ODS, 3.59 MB

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Air Pollution in the UK: Compliance Assessment Data for Ozone

ODS, 25.1 MB

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Air Pollution in the UK: Compliance Assessment Data for PM10

ODS, 11.2 MB

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Air Pollution in the UK: Compliance Assessment Data for PM2.5

ODS, 11.2 MB

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Air Pollution in the UK: Compliance Assessment Data for Sulphur Dioxide

ODS, 16.5 MB

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Details

The UK undertakes annual air quality assessments under the Air Quality Standards Regulations 2010.

The assessment compares measured and modelled air pollutant concentrations with the:

• limit values
• critical levels
• target values
• long-term objectives

The 2025 assessment makes use of a new, more advanced national model.

This page publishes data that underpins the Air Pollution in the UK 2025 report.

Find the:

• modelled data used in the compliance assessment
• overall results in the Air pollution in the UK 2025 report