UK DAQI for PM2.5
Published by the UK's Department for Environment, Food and Rural Affairs (Defra). The UK's Daily Air Quality Index, on UK-AIR's forecasts and alerts across the four nations.
The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. Show SmogRank's numbers in UK DAQI; you can change it under any chart.
Convert a reading
Set at 6.1 µg/m³, the middle of the 2515 cities on the 24-hour board.
Try 15.0 µg/m³ (the WHO's 24-hour guideline) or 102.6 µg/m³ (eManzimtoti over the last 24 hours).
Its bands
Low
DAQI 1–3 · up to 35 µg/m³
Usual outdoor activity for everyone.
Takes in the WHO's 24-hour guideline (15 µg/m³).
Moderate
DAQI 4–6 · over 35 to 53 µg/m³
Adults and children with heart or lung problems who feel symptoms are advised to consider less strenuous outdoor activity.
Over the WHO's 24-hour guideline (15 µg/m³) all the way.
High
DAQI 7–9 · over 53 to 70 µg/m³
People at risk are advised to cut strenuous effort, outdoors above all; anyone with sore eyes, a cough or a sore throat to consider doing less.
Over the WHO's 24-hour guideline (15 µg/m³) all the way.
Very high
DAQI 10 · over 70 µg/m³
People at risk are advised to avoid strenuous effort, and everyone else to cut it, outdoors above all.
Over the WHO's 24-hour guideline (15 µg/m³) all the way.
The meanings above are ours, in short. The publisher's own advice for each band: the UK's Department for Environment, Food and Rural Affairs (Defra).
Each scale here is its PM2.5 part only. Official indexes take the worst of several pollutants, so a city's official number can be higher. The scales are defined on 24-hour means (AQHI+ on hourly ones); how we use them.
Other scales
US AQI · India AQI · China AQI · European AQI · Canada AQHI+. Every scale side by side.
Nothing on SmogRank is medical advice. For health guidance during bad air, follow your local health authority.