SmogRank / United Kingdom / England / Barnstaple

Barnstaple, month by month

Barnstaple has a measured daily mean on 741 days since 1 January 2023. Its worst month was January 2023, at 55 US AQI (11.4 µg/m³), 373rd of 1,261 cities on that month's world ranking. Its cleanest was September 2025, at 23 US AQI (4.2 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)82 days measured
Jan28#2,321Feb32#2,465Mar20 daysAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOct16#2,687
2025too few days for a mean (a year needs 256)218 days measured
JannoneFebnoneMar2 daysApr48#1,563May44#1,380Jun32#2,219Jul28#2,595Aug34#2,450Sep23#2,893Oct19 daysNov11 daysDec20 days
2024too few days for a mean (a year needs 257)232 days measured
Jan21 daysFeb15 daysMar20 daysApr19 daysMay42#1,482Jun31#2,153Jul23#2,416Aug35#1,699Sep37#1,259Oct28#1,775NovnoneDecnone
2023too few days for a mean (a year needs 256)209 days measured
Jan55#373Feb3 daysMar10 daysApr52#478May17 daysJun13 daysJul19 daysAug17 daysSep19 daysOct16 daysNov46#1,055Dec42#1,368
Each square is a month's mean PM2.5 in US AQI from Barnstaple'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 Barnstaple 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

27 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.
Mar 202620 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Dec 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Nov 202511 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks.
Oct 202519 of 31 days measured; a month needs 22. The others: 12 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.
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.
Feb 202415 of 29 days measured; a month needs 21. The others: 1 missing from OpenAQ's archive, 13 with under 18 hours of readings or readings that failed our checks.
Jan 202421 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Oct 202316 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks.
Sep 202319 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
Aug 202317 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Jul 202319 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 11 with under 18 hours of readings or readings that failed our checks.
Jun 202313 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks.
May 202317 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Mar 202310 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks.
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.

Barnstaple's worst months

MonthUS AQIDays measuredWorld rank
January 2023 5511.4 µg/m³22 of 31373rdof 1,261
April 2023 529.7 µg/m³21 of 30478thof 1,622
April 2025 488.7 µg/m³28 of 301,563rdof 2,951
November 2023 468.3 µg/m³29 of 301,055thof 2,243
May 2025 447.9 µg/m³31 of 311,380thof 2,826
December 2023 427.6 µg/m³23 of 311,368thof 2,247

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.

Barnstaple's worst days

DayUS AQIEpisode
5 Mar 2026 8628.0 µg/m³Europe, 1 to 12 March 2026
9 Mar 2026 8326.4 µg/m³Europe, 1 to 12 March 2026
15 Feb 2023 8225.5 µg/m³Europe, 6 to 25 February 2023
14 Feb 2023 8024.5 µg/m³Europe, 6 to 25 February 2023
20 Mar 2026 7723.3 µg/m³–
25 Jan 2023 7622.7 µg/m³–
20 Sept 2024 7622.5 µg/m³–
12 May 2024 7522.2 µg/m³–
21 Mar 2026 7220.5 µg/m³–
21 Sept 2024 7120.0 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, Barnstaple, United Kingdom, 1 Jan 2023 – 12 Oct 2026. Monitor data from UK-AIR (Defra), read from the publisher; sources listed at smogrank.com/sources. smogrank.com/gb/barnstaple/history (accessed 12 Oct 2026).

Download chart (PNG)

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.

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

Updated 2026-10-12 23:07 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).