SmogRank / United Kingdom / England / Street

Street, month by month

Street has a measured daily mean on 759 days since 1 January 2023. Its worst month was March 2026, at 55 US AQI (11.3 µg/m³), 1,366th of 2,971 cities on that month's world ranking. Its cleanest was July 2024, at 21 US AQI (3.8 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)88 days measured
Jan31#2,250Feb27#2,614Mar55#1,366AprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOct18#2,672
2025too few days for a mean (a year needs 256)225 days measured
JannoneFebnoneMar2 daysApr52#1,282May41#1,506Jun29#2,276Jul25#2,705Aug34#2,450Sep24#2,864Oct34#1,506Nov12 daysDec34#2,408
2024too few days for a mean (a year needs 257)243 days measured
Jan39#1,518Feb26#2,197Mar19 daysApr17 daysMay38#1,737Jun29#2,195Jul21#2,466Aug34#1,733Sep40#1,100Oct27#1,801NovnoneDecnone
2023too few days for a mean (a year needs 256)203 days measured
Jan46#678Feb3 daysMar9 daysApr20 daysMay17 daysJun17 daysJul13 daysAug19 daysSep45#1,077Oct15 daysNov30#1,886Dec32#1,885
Each square is a month's mean PM2.5 in US AQI from Street's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Street marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

22 months
MonthWhy
Sep 2026No day measured. The others: 30 with no readings from the monitor.
Aug 2026No day measured. The others: 31 with no readings from the monitor.
Jul 2026No day measured. The others: 31 with no readings from the monitor.
Jun 2026No day measured. The others: 30 with no readings from the monitor.
May 2026No day measured. The others: 31 with no readings from the monitor.
Apr 2026No day measured. The others: 30 with no readings from the monitor.
Nov 202512 of 30 days measured; a month needs 21. The others: 17 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours).
Mar 20252 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Feb 2025No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2024No day measured. The others: 31 with no readings from the monitor.
Nov 2024No day measured. The others: 30 with no readings from the monitor.
Apr 202417 of 30 days measured; a month needs 21. The others: 9 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours), 2 with readings left out by our checks.
Mar 202419 of 31 days measured; a month needs 22. The others: 2 with no readings from the monitor, 7 with readings for part of the day (a day needs 18 hours), 3 with readings left out by our checks.
Oct 202315 of 31 days measured; a month needs 22. The others: 3 with no readings from the monitor, 12 with readings for part of the day (a day needs 18 hours), 1 with readings left out by our checks.
Aug 202319 of 31 days measured; a month needs 22. The others: 5 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours), 5 with readings left out by our checks.
Jul 202313 of 31 days measured; a month needs 22. The others: 2 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours), 6 with readings left out by our checks, 1 missing from OpenAQ's archive.
Jun 202317 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 12 with readings for part of the day (a day needs 18 hours).
May 202317 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 12 with readings for part of the day (a day needs 18 hours), 1 with readings left out by our checks.
Apr 202320 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 5 with readings for part of the day (a day needs 18 hours), 1 with readings left out by our checks, 3 missing from OpenAQ's archive.
Mar 20239 of 31 days measured; a month needs 22. The others: 2 with readings for part of the day (a day needs 18 hours), 20 missing from OpenAQ's archive.
Feb 20233 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Street's worst months

MonthUS AQIDays measuredWorld rankEpisode
March 2026 5511.3 µg/m³25 of 311,366thof 2,971Europe, 1 to 12 March 2026
April 2025 529.6 µg/m³27 of 301,282ndof 2,951–
January 2023 468.2 µg/m³22 of 31678thof 1,261France, The Netherlands and United Kingdom, January 2023
September 2023 458.1 µg/m³22 of 301,077thof 2,176–
May 2025 417.4 µg/m³29 of 311,506thof 2,826–
September 2024 407.2 µg/m³21 of 301,100thof 2,010–

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Street's worst days

DayUS AQIEpisode
9 Mar 2026 9432.2 µg/m³Europe, 1 to 12 March 2026
25 Jan 2023 9331.9 µg/m³France, The Netherlands and United Kingdom, January 2023
15 Feb 2023 8125.2 µg/m³Europe, 6 to 25 February 2023
14 Feb 2023 7924.3 µg/m³Europe, 6 to 25 February 2023
21 Mar 2026 7723.2 µg/m³–
20 Sept 2024 7723.0 µg/m³–
20 Mar 2026 7622.4 µg/m³–
5 Mar 2026 7522.2 µg/m³Europe, 1 to 12 March 2026
8 Mar 2026 7321.0 µg/m³Europe, 1 to 12 March 2026
21 Sept 2024 6918.8 µg/m³–

Daily means, the highest since 1 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Street, United Kingdom, 1 Jan 2023 – 11 Oct 2026. Monitor data from UK-AIR (Defra), read from the publisher; sources listed at smogrank.com/sources. smogrank.com/gb/street/history (accessed 12 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Street now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 21:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).