Advisories:
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| County | Site | Units | 24-Hour | Hour Of Day | 1 Hour | Hour Of Day |
|---|---|---|---|---|---|---|
| SE England | Bath Chelsea House | µg/m³ | 14.2 | 04 PM | 23 | 06 AM |
| NIRE | Belfast Centre AURN | µg/m³ | 24.9 | 01 AM | 34 | 05 AM |
| NE England | Bradford Keighley | µg/m³ | ||||
| NE England | Bradford Tong Street | µg/m³ | ||||
| NE England | Bradford Treadwell Mills | µg/m³ | ||||
| SW England | Bristol St Paul's AURN | µg/m³ | 17.9 | 06 PM | 24 | 06 AM |
| SE England | Chatham Roadside AURN | µg/m³ | 15.9 | 05 AM | 19 | 10 AM |
| East Anglia | Great Yarmouth South Denes | µg/m³ | ||||
| NE England | Hull Freetown AURN | µg/m³ | 11.3 | 07 AM | 19 | 05 AM |
| NE England | Immingham Woodlands Avenue AURN | µg/m³ | ||||
| East Anglia | King's Lynn Estuary Close | µg/m³ | 6.3 | 12 AM | 10 | 08 AM |
| East Anglia | Kings Lynn Page Stair Lane | µg/m³ | 6 | 12 AM | 10 | 08 AM |
| East Anglia | King's Lynn Stoke Ferry Buckenham Drive | µg/m³ | 6.1 | 12 AM | 11 | 08 AM |
| East Anglia | Kings Lynn Stoke Ferry Wretton Road | µg/m³ | 5.8 | 12 AM | 10 | 08 AM |
| NW England | Lancaster Cable Street | µg/m³ | ||||
| Midlands | Leicester University AURN | µg/m³ | 12.9 | 02 PM | 18 | 04 AM |
| NIRE | Lisburn Dunmurry Seymour Hill | µg/m³ | ||||
| NW England | Liverpool Speke AURN | µg/m³ | 8.8 | 01 AM | 17 | 05 AM |
| SE England | London Bexley AURN | µg/m³ | 17 | 06 AM | 23 | 01 AM |
| WEST | London Haringey Roadside AURN | µg/m³ | ||||
| SE England | Maidstone Upper Stone Street CLOSED | µg/m³ | 20.3 | 07 AM | 30 | 07 AM |
| NE England | Newcastle Centre AURN | µg/m³ | 17.7 | 01 AM | 16 | 07 AM |
| NIRE | North Down Holywood A2 | µg/m³ | ||||
| NE England | North Lincs Santon | µg/m³ | ||||
| East Anglia | Norwich Castle Meadow CLOSED | µg/m³ | 6.1 | 03 PM | 13 | 07 PM |
| East Anglia | Norwich Lakenfields AURN | µg/m³ | 7.5 | 07 AM | 9 | 09 PM |
| Midlands | Nottingham Centre AURN CLOSED | µg/m³ | 10.5 | 06 PM | 14 | 03 AM |
| Midlands | Oxford St Ebbes AURN | µg/m³ | 16.3 | 08 AM | 21 | 05 AM |
| SE England | Portsmouth AURN | µg/m³ | 12.4 | 10 AM | 20 | 03 AM |
| NW England | Preston AURN | µg/m³ | 15 | 01 AM | 23 | 07 AM |
| SE England | Reading New Town AURN | µg/m³ | ||||
| Herts & Beds | Sandy Roadside AURN | µg/m³ | 15.3 | 10 AM | 25 | 05 AM |
| NE England | Scunthorpe East Common Lane Osiris | µg/m³ | 6.7 | 12 AM | 18 | 05 AM |
| NE England | South Tyneside Edinburgh Road | µg/m³ | ||||
| SE England | Southampton Centre AURN | µg/m³ | 15.1 | 08 AM | 29 | 06 AM |
| SE England | Stanford-le-Hope Roadside AURN | µg/m³ | 16.6 | 05 AM | 16 | 05 AM |
| Midlands | Stoke-on-Trent Centre AURN | µg/m³ | 7.9 | 04 PM | 13.5 | 05 AM |
| NE England | Sunderland Silksworth AURN CLOSED | µg/m³ | 18.7 | 01 AM | 13 | 08 AM |
| SE England | Swale St Pauls Street CLOSED | µg/m³ | ||||
| None | Telford Hollinswood AURN | µg/m³ | ||||
| NW England | Warrington AURN | µg/m³ | 10.5 | 01 AM | 17 | 07 AM |
| SE England | Winchester St Georges Street | µg/m³ | ||||
| NW England | Wirral Tranmere AURN | µg/m³ | 11.7 | 01 AM | 17 | 06 AM |
| Wales | Wrexham AURN | µg/m³ | 11.1 | 01 PM | 19 | 06 AM |
| NE England | York Bootham AURN | µg/m³ | 15.9 | 01 AM | 18 | 04 AM |
| NE England | York Fishergate AURN | µg/m³ | 11.7 | 01 AM | 16 | 08 AM |
