SmogRank / United Kingdom / England / Brightlingsea

Brightlingsea, month by month

Brightlingsea has a measured daily mean on 790 days since 1 January 2023. Its worst month was September 2023, at 58 US AQI (12.6 µg/m³), 285th of 2,176 cities on that month's world ranking. Its cleanest was September 2025, at 26 US AQI (4.6 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)91 days measured
Jan48#1,337Feb42#2,078Mar57#1,199AprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOct26#2,288
2025too few days for a mean (a year needs 256)224 days measured
JannoneFebnoneMar2 daysApr56#793May49#1,142Jun36#2,094Jul32#2,378Aug33#2,510Sep26#2,768Oct20 daysNov10 daysDec41#2,030
2024too few days for a mean (a year needs 257)256 days measured
Jan42#1,344Feb32#1,898Mar20 daysApr19 daysMay51#906Jun34#1,967Jul28#2,263Aug37#1,634Sep49#611Oct21 daysNovnoneDecnone
2023too few days for a mean (a year needs 256)219 days measured
Jan44#720Feb3 daysMar11 daysApr52#497May18 daysJun15 daysJul18 daysAug20 daysSep58#285Oct13 daysNov33#1,719Dec33#1,822
Each square is a month's mean PM2.5 in US AQI from Brightlingsea'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 Brightlingsea 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

23 months
MonthWhy
Sep 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Nov 202510 of 30 days measured; a month needs 21. The others: 20 with under 18 hours of readings or readings that failed our checks.
Oct 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
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 under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 202421 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Apr 202419 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
Mar 202420 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Oct 202313 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks.
Aug 202320 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jul 202318 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 12 with under 18 hours of readings or readings that failed our checks.
Jun 202315 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
May 202318 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Mar 202311 of 31 days measured; a month needs 22. The others: 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.

Brightlingsea's worst months

MonthUS AQIDays measuredWorld rankEpisode
September 2023 5812.6 µg/m³23 of 30285thof 2,176United Kingdom, Belgium and 2 more countries, September 2023
March 2026 5712.1 µg/m³26 of 311,199thof 2,971Europe, 18 to 25 March 2026
Europe, 1 to 12 March 2026
April 2025 5611.8 µg/m³28 of 30793rdof 2,951United Kingdom, Belgium and 2 more countries, April 2025
United Kingdom and France, April 2025
April 2023 529.6 µg/m³21 of 30497thof 1,622–
May 2024 519.3 µg/m³30 of 31906thof 2,684–
September 2024 498.9 µg/m³28 of 30611thof 2,010United Kingdom, The Netherlands and Jersey, September 2024

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.

Brightlingsea's worst days

DayUS AQIEpisode
8 Sept 2023 11741.8 µg/m³United Kingdom, Belgium and 2 more countries, September 2023
2 May 2025 10738.1 µg/m³United Kingdom and The Netherlands, May 2025
15 Feb 2023 10436.7 µg/m³Europe, 6 to 25 February 2023
10 Sept 2023 10135.7 µg/m³United Kingdom, Belgium and 2 more countries, September 2023
7 Sept 2023 9331.6 µg/m³United Kingdom, Belgium and 2 more countries, September 2023
11 Mar 2024 9331.4 µg/m³United Kingdom and The Netherlands, March 2024
5 Mar 2026 9130.7 µg/m³Europe, 1 to 12 March 2026
9 Mar 2026 9130.5 µg/m³Europe, 1 to 12 March 2026
12 Apr 2025 8829.0 µg/m³United Kingdom, Belgium and 2 more countries, April 2025
24 Mar 2026 8829.0 µg/m³Europe, 18 to 25 March 2026

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, Brightlingsea, 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/brightlingsea/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.

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

Updated 2026-10-12 19:07 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).