SmogRank / United Kingdom / Scotland / Grangemouth

Grangemouth, month by month

Grangemouth has a measured daily mean on 715 days since 11 May 2023. Its worst month was January 2026, at 44 US AQI (8.0 µg/m³), 1,495th of 2,617 cities on that month's world ranking. Its cleanest was June 2024, at 11 US AQI (2.0 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 199)87 days measured
Jan44#1,495Feb31#2,522Mar31#2,600AprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOct36#1,546
2025too few days for a mean (a year needs 256)217 days measured
JannoneFebnoneMar2 daysApr41#1,916May39#1,581Jun32#2,206Jul20#2,802Aug21 daysSep21#2,993Oct21 daysNov11 daysDec38#2,203
2024too few days for a mean (a year needs 257)254 days measured
Jan34#1,769Feb21#2,340Mar32#1,204Apr18 daysMay39#1,692Jun11#2,544Jul22#2,454Aug27#1,893Sep18#1,979Oct21 daysNovnoneDecnone
2023too few days for a mean (a year needs 256)157 days measured
JanFebMarAprMay11 daysJun16 daysJul19 daysAug19#1,957Sep25#2,053Oct15 daysNov26#2,030Dec36#1,694
Each square is a month's mean PM2.5 in US AQI from Grangemouth'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 Grangemouth 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

20 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 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 202521 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Aug 202521 of 31 days measured; a month needs 22. The others: 10 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 202418 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks.
Oct 202315 of 31 days measured; a month needs 22. The others: 16 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 202316 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks.
May 202311 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.

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

Grangemouth's worst months

MonthUS AQIDays measuredWorld rank
January 2026 448.0 µg/m³25 of 311,495thof 2,617
April 2025 417.4 µg/m³28 of 301,916thof 2,951
May 2025 397.1 µg/m³30 of 311,581stof 2,826
May 2024 397.0 µg/m³30 of 311,692ndof 2,684
December 2025 386.8 µg/m³27 of 312,203rdof 3,006
December 2023 366.5 µg/m³24 of 311,694thof 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.

Grangemouth's worst days

DayUS AQI
11 Apr 2025 7421.6 µg/m³
2 Dec 2023 7119.8 µg/m³
25 Jan 2026 6919.0 µg/m³
15 May 2024 6818.4 µg/m³
8 Jan 2024 6516.6 µg/m³
12 Apr 2025 6516.5 µg/m³
11 May 2025 6516.5 µg/m³
10 Jan 2026 6416.1 µg/m³
26 Nov 2023 6416.0 µg/m³
7 Jan 2024 6315.5 µg/m³

Daily means, the highest since 11 May 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, Grangemouth, United Kingdom, 11 May 2023 – 11 Oct 2026. Monitor data from UK-AIR (Defra), read from the publisher; sources listed at smogrank.com/sources. smogrank.com/gb/grangemouth/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.

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

Updated 2026-10-12 20:07 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).