Advisories:
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| County | Site | Units | 24-Hour | Hour Of Day | 1 Hour | Hour Of Day |
|---|---|---|---|---|---|---|
| SW England | Bath A4 Roadside AURN | µg/m³ | ||||
| SE England | Bath Gay Street Zephyr | µg/m³ | 3 | 09 PM | 5 | 08 AM |
| NIRE | Belfast Centre AURN | µg/m³ | 4.2 | 12 AM | 8 | 09 AM |
| NW England | Birkenhead Borough Road AURN | µg/m³ | ||||
| NE England | Bradford Apperley Bridge Marina Zephyr | µg/m³ | 6.8 | 12 AM | 15.8 | 12 AM |
| NE England | Bradford Cavendish Prim Sch Hall Rd Zephyr | µg/m³ | 6.9 | 12 AM | 17.5 | 11 PM |
| NE England | Bradford East Bowling Flockton Grove Zephyr | µg/m³ | 7.6 | 12 AM | 18.5 | 12 AM |
| NE England | Bradford Farfield Prim Sch Reevy Cres Zephyr | µg/m³ | 6.4 | 12 AM | 20.3 | 12 AM |
| NE England | Bradford Girlington St Leonards Road Zephyr | µg/m³ | 7.5 | 12 AM | 21.3 | 11 PM |
| NE England | Bradford Gt Horton All Saints Prim Sch Zephyr | µg/m³ | 7.3 | 12 AM | 17.8 | 12 AM |
| NE England | Bradford Horton Aberdeen Place Zephyr | µg/m³ | 6.3 | 12 AM | 17.5 | 12 AM |
| NE England | Bradford Ilkley Grove Road Zephyr | µg/m³ | 5.7 | 12 AM | 14.5 | 12 AM |
| NE England | Bradford Keighley | µg/m³ | 6.3 | 09 AM | 13 | 04 AM |
| NE England | Bradford Keighley Zephyr | µg/m³ | 8.2 | 12 AM | 19.5 | 06 AM |
| NE England | Bradford Low Moor First Street Zephyr | µg/m³ | 8.3 | 12 AM | 19.3 | 12 AM |
| NE England | Bradford Saltaire Titus Street Zephyr | µg/m³ | 6.7 | 12 AM | 16.8 | 12 AM |
| NE England | Bradford Silsden Hothfield Street Zephyr | µg/m³ | 5.1 | 12 AM | 15.8 | 12 AM |
| NE England | Bradford Tong Street | µg/m³ | 7.6 | 08 PM | 17 | 10 AM |
| NE England | Bradford Treadwell Mills | µg/m³ | 4 | 06 AM | 7 | 04 AM |
| SW England | Bristol St Paul's AURN | µg/m³ | ||||
| None | Broxtowe Trowell Zephyr | µg/m³ | 6.2 | 09 AM | 11 | 12 AM |
| Midlands | Cannock A5190 Roadside AURN | µg/m³ | ||||
| SE England | Chatham Roadside AURN | µg/m³ | 9.5 | 09 PM | 22 | 06 AM |
| East Anglia | Great Yarmouth South Denes | µg/m³ | 6.9 | 01 PM | 8.5 | 07 AM |
| NE England | Hull Freetown AURN | µg/m³ | 6.9 | 12 AM | 12.8 | 11 PM |
| NE England | Hull Holderness Road AURN | µg/m³ | ||||
| NE England | Immingham Woodlands Avenue AURN | µg/m³ | 6.7 | 04 PM | 10.4 | 09 PM |
| Midlands | Kidderminster Horsefair Zephyr CLOSED | µg/m³ | 8.2 | 01 AM | 9.5 | 03 PM |
| East Anglia | King's Lynn Estuary Close | µg/m³ | 3.8 | 01 AM | 5.5 | 12 AM |
| East Anglia | Kings Lynn Page Stair Lane | µg/m³ | ||||
| East Anglia | King's Lynn Stoke Ferry Buckenham Drive CLOSED | µg/m³ | 4.9 | 12 AM | 9 | 04 PM |
| East Anglia | Kings Lynn Stoke Ferry Wretton Road | µg/m³ | 4.1 | 12 AM | 5.8 | 07 PM |
| NW England | Lancaster Cable Street | µg/m³ | 3.7 | 10 AM | 7.3 | 08 AM |
| Midlands | Leicester University AURN | µg/m³ | 3.9 | 12 AM | 6.6 | 07 AM |
| NIRE | Lisburn Dunmurry Seymour Hill | µg/m³ | 2.8 | 10 PM | 5.4 | 08 AM |
| NIRE | Lisburn Dunmurry Seymour Hill PM2.5 | µg/m³ | 2.7 | 11 PM | 5 | 07 AM |
| NW England | Liverpool Speke AURN | µg/m³ | 6.5 | 02 AM | 14 | 12 AM |
| SE England | London Bexley AURN | µg/m³ | 6.5 | 12 AM | 12.6 | 12 AM |
| WEST | London Haringey Roadside AURN | µg/m³ | ||||
| NE England | Newcastle Centre AURN | µg/m³ | 6.7 | 04 AM | 10 | 03 AM |
| NIRE | North Down Holywood A2 | µg/m³ | 3.4 | 12 AM | 5.9 | 09 AM |
| NE England | North Lincs Santon | µg/m³ | 8.6 | 01 AM | 16 | 06 AM |
| East Anglia | Norwich Castle Meadow 2 | µg/m³ | 9 | 02 PM | 12.2 | 02 AM |
| East Anglia | Norwich Castle Meadow CLOSED | µg/m³ | 8.7 | 02 PM | 12.1 | 01 AM |
| East Anglia | Norwich Lakenfields AURN | µg/m³ | 5.7 | 03 PM | 11.3 | 02 AM |
| Midlands | Nottingham Centre AURN CLOSED | µg/m³ | 8.7 | 12 AM | 24.7 | 12 PM |
| Midlands | Nottingham Western Boulevard AURN | µg/m³ | ||||
| Midlands | Oadby Zephyr | µg/m³ | 5.5 | 12 AM | 8.8 | 07 AM |
| Midlands | Oxford St Ebbes AURN | µg/m³ | 3.8 | 09 PM | 5.4 | 01 AM |
| SE England | Portsmouth Anglesea Road AURN | µg/m³ | ||||
| SE England | Portsmouth AURN | µg/m³ | 5.7 | 11 PM | 10.2 | 10 PM |
| NW England | Preston AURN | µg/m³ | 3.7 | 12 AM | 7.9 | 12 AM |
| SE England | Reading New Town AURN | µg/m³ | 4.4 | 12 AM | 6.3 | 12 AM |
| Herts & Beds | Sandy Roadside AURN CLOSED | µg/m³ | 6.4 | 06 PM | 8 | 01 AM |
| NE England | Scunthorpe East Common Lane Osiris | µg/m³ | 3.6 | 12 AM | 8.8 | 06 PM |
| SW England | South Glos Coldharbour Lane A4174 | µg/m³ | 7.2 | 10 AM | 12 | 01 AM |
| NE England | South Tyneside Edinburgh Road | µg/m³ | ||||
| SE England | Southampton A33 AURN | µg/m³ | ||||
| SE England | Southampton Centre AURN | µg/m³ | 6 | 12 AM | 11 | 11 PM |
| SE England | Stanford-le-Hope Roadside AURN | µg/m³ | 7.8 | 12 AM | 15 | 05 AM |
| Midlands | Stoke-on-Trent A50 Roadside AURN | µg/m³ | ||||
| Midlands | Stoke-on-Trent Centre AURN | µg/m³ | 5.4 | 12 AM | 8.4 | 03 AM |
| NE England | Sunderland Silksworth AURN CLOSED | µg/m³ | 4.3 | 01 PM | 6.6 | 03 AM |
| NE England | Sunderland Wessington Way AURN | µg/m³ | ||||
| None | Telford Hollinswood AURN | µg/m³ | 3.5 | 05 AM | 5.8 | 12 AM |
| NW England | Warrington AURN | µg/m³ | 5.2 | 01 AM | 8 | 08 AM |
| NW England | Warrington Sankey Way | µg/m³ | ||||
| SE England | Winchester St Georges Street | µg/m³ | 6.2 | 12 AM | 8.5 | 05 PM |
| NW England | Wirral Tranmere AURN | µg/m³ | 2.7 | 04 AM | 2.8 | 04 AM |
| Wales | Wrexham AURN | µg/m³ | 2.7 | 03 PM | 3.2 | 01 PM |
| NE England | York Bootham AURN | µg/m³ | ||||
| NE England | York Fishergate AURN | µg/m³ |
