Air Quality
3.2/5
18.3 µg/m³Sensitive Groups
Air Quality Profile
Stara Zagora reports an annual PM2.5 of 18.3 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Stara Zagora
Bulgaria
BulgariaAnnual Average
ModerateWHO annual classification
18.3µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2626 µg/m³ — Poor
2020 µg/m³ — Moderate
2121 µg/m³ — Moderate
1616 µg/m³ — Moderate
1313 µg/m³ — Fair
1515 µg/m³ — Fair
1515 µg/m³ — Moderate
1616 µg/m³ — Moderate
1515 µg/m³ — Moderate
1818 µg/m³ — Moderate
2121 µg/m³ — Moderate
2525 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
2626 µg/m³ — Poor
2020 µg/m³ — Moderate
2121 µg/m³ — Moderate
1616 µg/m³ — Moderate
1313 µg/m³ — Fair
1515 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1515 µg/m³ — Moderate
1616 µg/m³ — Moderate
1515 µg/m³ — Moderate
1818 µg/m³ — Moderate
2121 µg/m³ — Moderate
2525 µg/m³ — Moderate
Best months: May–Jun, SepWorst 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: ●●●
Air Quality Profile
Stara Zagora reports an annual PM2.5 of 18.3 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Stara ZagoraBulgaria
BulgariaAnnual Average
ModerateWHO annual classification
18.3µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2626 µg/m³ — Poor
2020 µg/m³ — Moderate
2121 µg/m³ — Moderate
1616 µg/m³ — Moderate
1313 µg/m³ — Fair
1515 µg/m³ — Fair
1515 µg/m³ — Moderate
1616 µg/m³ — Moderate
1515 µg/m³ — Moderate
1818 µg/m³ — Moderate
2121 µg/m³ — Moderate
2525 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
2626 µg/m³ — Poor
2020 µg/m³ — Moderate
2121 µg/m³ — Moderate
1616 µg/m³ — Moderate
1313 µg/m³ — Fair
1515 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1515 µg/m³ — Moderate
1616 µg/m³ — Moderate
1515 µg/m³ — Moderate
1818 µg/m³ — Moderate
2121 µg/m³ — Moderate
2525 µg/m³ — Moderate
Best months: May–Jun, SepWorst 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: ●●●
Who thrives in Stara Zagora
Things to consider in Stara Zagora
PM2.5 annual average of 18.3 µg/m³ exceeds the WHO interim target of 15 µg/m³. The WHO guideline value is 5 µg/m³.
Data sources: WHO (air quality), OECD (safety).
Why not Stara Zagora?
Why not Stara Zagora? Honestly, air quality could be better — Stara Zagora's 18.3 µg/m³ annual PM2.5 is above WHO guidelines, though still within ranges common for larger cities.
Frequently asked about Stara Zagora
▶How many sunny days does Stara Zagora have per year?
Stara Zagora averages approximately 228 sunny days per year, based on historical climate data.
▶What is the air quality in Stara Zagora?
Stara Zagora has an annual PM2.5 concentration of 18.3 µg/m³, classified as "Moderate" by WHO standards. Above WHO targets. Some respiratory effects possible with prolonged exposure.