Air Quality Lab — Letterkenny, Ireland
Air Quality Profile·
Letterkenny reports an annual PM2.5 of 5.9 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Letterkenny
Ireland
IrelandAnnual Average
GoodWHO annual classification
5.9µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
7.67.6 µg/m³ — Good
7.47.4 µg/m³ — Good
9.19.1 µg/m³ — Good
6.26.2 µg/m³ — Good
4.94.9 µg/m³ — Excellent
4.84.8 µg/m³ — Excellent
3.73.7 µg/m³ — Excellent
4.24.2 µg/m³ — Excellent
4.54.5 µg/m³ — Excellent
4.84.8 µg/m³ — Excellent
6.26.2 µg/m³ — Good
7.27.2 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
7.67.6 µg/m³ — Good
7.47.4 µg/m³ — Good
9.19.1 µg/m³ — Good
6.26.2 µg/m³ — Good
4.94.9 µg/m³ — Excellent
4.84.8 µg/m³ — Excellent
Jul
Aug
Sep
Oct
Nov
Dec
3.73.7 µg/m³ — Excellent
4.24.2 µg/m³ — Excellent
4.54.5 µg/m³ — Excellent
4.84.8 µg/m³ — Excellent
6.26.2 µg/m³ — Good
7.27.2 µg/m³ — Good
Best months: Jul–SepWorst months: Jan–Mar
Excellent0–5 µg/m³Good5–10 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Ireland
Letterkenny: 5.9 µg/m³. Typical range in Ireland: 6.4–6.8 µg/m³. High anchor: Dublin, 7.3 µg/m³.
29 cities tracked