Air Quality Lab — Koper, Slovenia
Air Quality Profile·
Koper reports an annual PM2.5 of 12.6 µg/m³. That's roughly double the WHO 2021 guideline but still far below the EU annual limit of 25 µg/m³.
Koper
Slovenia
SloveniaAnnual Average
FairWHO annual classification
12.6µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
1717 µg/m³ — Moderate
2020 µg/m³ — Moderate
1515 µg/m³ — Fair
1111 µg/m³ — Fair
9.39.3 µg/m³ — Good
9.39.3 µg/m³ — Good
1111 µg/m³ — Fair
1010 µg/m³ — Good
1111 µg/m³ — Fair
1212 µg/m³ — Fair
1212 µg/m³ — Fair
1515 µg/m³ — Fair
Jan
Feb
Mar
Apr
May
Jun
1717 µg/m³ — Moderate
2020 µg/m³ — Moderate
1515 µg/m³ — Fair
1111 µg/m³ — Fair
9.39.3 µg/m³ — Good
9.39.3 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
1111 µg/m³ — Fair
1010 µg/m³ — Good
1111 µg/m³ — Fair
1212 µg/m³ — Fair
1212 µg/m³ — Fair
1515 µg/m³ — Fair
Best months: May–Jun, AugWorst months: Jan–Feb, Dec
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
Koper: 12.6 µg/m³. Typical range in Slovenia: 12.6–13.8 µg/m³. Low anchor: Trbovlje, 11.6 µg/m³. High anchor: Ljubljana, 15.5 µg/m³.
9 cities tracked