Air Quality
2.7/5
23.0 µg/m³Sensitive Groups
Air Quality Profile
Yei reports an annual PM2.5 of 23.0 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Yei
South Sudan
South SudanAnnual Average
ModerateWHO annual classification
23.0µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
3535 µg/m³ — Poor
3232 µg/m³ — Poor
2626 µg/m³ — Poor
1616 µg/m³ — Moderate
1818 µg/m³ — Moderate
2626 µg/m³ — Poor
2828 µg/m³ — Poor
2020 µg/m³ — Moderate
1818 µg/m³ — Moderate
1616 µg/m³ — Moderate
2020 µg/m³ — Moderate
2525 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
3535 µg/m³ — Poor
3232 µg/m³ — Poor
2626 µg/m³ — Poor
1616 µg/m³ — Moderate
1818 µg/m³ — Moderate
2626 µg/m³ — Poor
Jul
Aug
Sep
Oct
Nov
Dec
2828 µg/m³ — Poor
2020 µg/m³ — Moderate
1818 µg/m³ — Moderate
1616 µg/m³ — Moderate
2020 µg/m³ — Moderate
2525 µg/m³ — Moderate
Best months: Apr–May, OctWorst months: Jan–Feb, Jul
Moderate15–25 µg/m³Poor25–35 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
Air Quality Profile
Yei reports an annual PM2.5 of 23.0 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
YeiSouth Sudan
South SudanAnnual Average
ModerateWHO annual classification
23.0µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
3535 µg/m³ — Poor
3232 µg/m³ — Poor
2626 µg/m³ — Poor
1616 µg/m³ — Moderate
1818 µg/m³ — Moderate
2626 µg/m³ — Poor
2828 µg/m³ — Poor
2020 µg/m³ — Moderate
1818 µg/m³ — Moderate
1616 µg/m³ — Moderate
2020 µg/m³ — Moderate
2525 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
3535 µg/m³ — Poor
3232 µg/m³ — Poor
2626 µg/m³ — Poor
1616 µg/m³ — Moderate
1818 µg/m³ — Moderate
2626 µg/m³ — Poor
Jul
Aug
Sep
Oct
Nov
Dec
2828 µg/m³ — Poor
2020 µg/m³ — Moderate
1818 µg/m³ — Moderate
1616 µg/m³ — Moderate
2020 µg/m³ — Moderate
2525 µg/m³ — Moderate
Best months: Apr–May, OctWorst months: Jan–Feb, Jul
Moderate15–25 µg/m³Poor25–35 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
Who thrives in Yei
Things to consider in Yei
PM2.5 annual average of 23.0 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 Yei?
Why not Yei? Honestly, air quality could be better — Yei's 23.0 µg/m³ annual PM2.5 is above WHO guidelines, though still within ranges common for larger cities.
Frequently asked about Yei
▶How many sunny days does Yei have per year?
Yei averages approximately 275 sunny days per year, based on historical climate data.
▶What is the air quality in Yei?
Yei has an annual PM2.5 concentration of 23.0 µg/m³, classified as "Moderate" by WHO standards. Above WHO targets. Some respiratory effects possible with prolonged exposure.