Air Quality Lab — Ljubljana, Slovenia
Air Quality Profile
Ljubljana reports an annual PM2.5 of 15.5 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Ljubljana
Slovenia
SloveniaAnnual Average
ModerateWHO annual classification
15.5µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2222 µg/m³ — Moderate
2424 µg/m³ — Moderate
1818 µg/m³ — Moderate
1414 µg/m³ — Fair
9.79.7 µg/m³ — Good
9.89.8 µg/m³ — Good
9.79.7 µg/m³ — Good
1111 µg/m³ — Fair
1111 µg/m³ — Fair
1414 µg/m³ — Fair
2222 µg/m³ — Moderate
2121 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
2222 µg/m³ — Moderate
2424 µg/m³ — Moderate
1818 µg/m³ — Moderate
1414 µg/m³ — Fair
9.79.7 µg/m³ — Good
9.89.8 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
9.79.7 µg/m³ — Good
1111 µg/m³ — Fair
1111 µg/m³ — Fair
1414 µg/m³ — Fair
2222 µg/m³ — Moderate
2121 µg/m³ — Moderate
Best months: May–JulWorst months: Jan–Feb, Nov
Good5–10 µg/m³Fair10–15 µg/m³Moderate15–25 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Slovenia
Ljubljana: 15.5 µg/m³. Typical range in Slovenia: 12.6–13.8 µg/m³. Low anchor: Trbovlje, 11.6 µg/m³.
9 cities tracked