Question to the Department for Environment, Food and Rural Affairs:

To ask the Secretary of State for Environment, Food and Rural Affairs, what consideration she has given to (a) revising Daily Air Quality Index thresholds to align with health evidence and (b) expanding the air pollution alert system to include fine particulate matter 2.5.

The Government is taking forward work to improve how air quality information is communicated to the public. Health advice accompanying the Daily Air Quality Index was updated in 2025, ensuring the advice is clinically accurate and aligns with the latest health evidence. Alongside the updated health advice, the Government is considering how the Daily Air Quality Index can be updated and is continuing work to improve digital systems and air quality alerts to ensure that information is timely, accessible, and presented in a clear and user‑friendly way. An expanded alerts service will be incrementally released over the course of the next 5 months which will incorporate all DAQI pollutants, including PM2.5.