Air Quality Lab — Ostrava, Czechia
Air Quality Profile
Ostrava reports an annual PM2.5 of 16.8 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Ostrava
Czechia
CzechiaAnnual Average
ModerateWHO annual classification
16.8µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2121 µg/m³ — Moderate
1818 µg/m³ — Moderate
2222 µg/m³ — Moderate
1717 µg/m³ — Moderate
1313 µg/m³ — Fair
1212 µg/m³ — Fair
1111 µg/m³ — Fair
1212 µg/m³ — Fair
1313 µg/m³ — Fair
1616 µg/m³ — Moderate
2121 µg/m³ — Moderate
2626 µg/m³ — Poor
Jan
Feb
Mar
Apr
May
Jun
2121 µg/m³ — Moderate
1818 µg/m³ — Moderate
2222 µg/m³ — Moderate
1717 µg/m³ — Moderate
1313 µg/m³ — Fair
1212 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1111 µg/m³ — Fair
1212 µg/m³ — Fair
1313 µg/m³ — Fair
1616 µg/m³ — Moderate
2121 µg/m³ — Moderate
2626 µg/m³ — Poor
Best months: Jun–AugWorst months: Jan, Mar, Dec
Fair10–15 µg/m³Moderate15–25 µg/m³Poor25–35 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Czechia
Ostrava: 16.8 µg/m³. Typical range in Czechia: 10.9–13.2 µg/m³. Low anchor: Cheb, 8.3 µg/m³. High anchor: Karviná, 18.0 µg/m³.
90 cities tracked