Edinburgh vs Grangemouth: PM2.5 compared

Over the last year, Grangemouth's air was 20% more polluted than Edinburgh's: PM2.5 averaged 6.6 µg/m³ against 5.5, on the 114 days both cities were measured. Grangemouth had the dirtier air on 79 of those days, Edinburgh on 27. Grangemouth was over the WHO's daily guideline of 15 µg/m³ on 4 of them, Edinburgh on 3.

Right now

Edinburgh#685on the 24-hour board of 738, at 13 US AQI (2.3 µg/m³)

Grangemouth#288on the 24-hour board of 738, at 35 US AQI (6.3 µg/m³)

The last year, day by day

Edinburgh

Grangemouth

Each city's daily mean from 8 Oct 2025 to 7 Oct 2026, one stripe a day, coloured by band. A blank stripe is a day without a daily mean.

Month by month

Monthly means in µg/m³ over the days both cities were measured. Solid: Edinburgh. Faded: Grangemouth. A month shows once both share 10 such days. Dashed line: the WHO daily guideline, 15 µg/m³.

Year by year

Year	Edinburgh	Grangemouth	Days both measured	Days Edinburgh was worse
2026 so far	33	36	67	18
2025	28	33	192	57
2024	32	28	190	114
2023	26	26	136	81

Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.

Each city's worst days

Edinburgh

25 Jan 20267120.0 µg/m³
21 Mar 20266717.8 µg/m³
24 Jan 20266315.3 µg/m³

Grangemouth

25 Jan 20266919.0 µg/m³
10 Jan 20266416.1 µg/m³
24 Jan 20266315.5 µg/m³

Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.

Compare either city with another

Edinburgh

Side by side with Penicuik (the nearest), London (United Kingdom's worst on 30 days), Gujranwala (the world's worst on 30 days).

Grangemouth

Side by side with London (United Kingdom's worst on 30 days), Gujranwala (the world's worst on 30 days).

Use this page

SmogRank, PM2.5 daily means compared, Edinburgh and Grangemouth, 8 Oct 2025 – 7 Oct 2026, smogrank.com/compare/gb-edinburgh/gb-grangemouth (accessed 8 Oct 2026).

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.

The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.

Updated 2026-10-08 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 readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published (why we use them).