Air Quality Lab — Saint Helier, Jersey
Air Quality Profile·
Saint Helier reports an annual PM2.5 of 6.8 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Saint Helier
Jersey
JerseyAnnual Average
GoodWHO annual classification
6.8µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
7.97.9 µg/m³ — Good
7.57.5 µg/m³ — Good
9.19.1 µg/m³ — Good
8.78.7 µg/m³ — Good
6.86.8 µg/m³ — Good
6.56.5 µg/m³ — Good
5.15.1 µg/m³ — Good
5.65.6 µg/m³ — Good
5.85.8 µg/m³ — Good
5.35.3 µg/m³ — Good
6.16.1 µg/m³ — Good
7.87.8 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
7.97.9 µg/m³ — Good
7.57.5 µg/m³ — Good
9.19.1 µg/m³ — Good
8.78.7 µg/m³ — Good
6.86.8 µg/m³ — Good
6.56.5 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
5.15.1 µg/m³ — Good
5.65.6 µg/m³ — Good
5.85.8 µg/m³ — Good
5.35.3 µg/m³ — Good
6.16.1 µg/m³ — Good
7.87.8 µg/m³ — Good
Best months: Jul–Aug, OctWorst months: Jan, Mar–Apr
Good5–10 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared worldwide
Saint Helier: 6.8 µg/m³. Typical range: 8.9–26.6 µg/m³. Low anchor: Bergen, 4.9 µg/m³. High anchor: Diepsloot, 162.1 µg/m³.
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