Air Quality Lab — Maseru, Lesotho
Air Quality Profile·
Maseru reports an annual PM2.5 of 32.7 µg/m³. That's above the EU annual limit of 25 µg/m³ — long-term exposure here carries documented health trade-offs.
Maseru
Lesotho
LesothoAnnual Average
PoorWHO annual classification
32.7µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
3030 µg/m³ — Poor
2020 µg/m³ — Moderate
2525 µg/m³ — Poor
2222 µg/m³ — Moderate
3333 µg/m³ — Poor
4040 µg/m³ — Unhealthy
5454 µg/m³ — Very Unhealthy
5454 µg/m³ — Very Unhealthy
3737 µg/m³ — Unhealthy
2828 µg/m³ — Poor
2424 µg/m³ — Moderate
2626 µg/m³ — Poor
Jan
Feb
Mar
Apr
May
Jun
3030 µg/m³ — Poor
2020 µg/m³ — Moderate
2525 µg/m³ — Poor
2222 µg/m³ — Moderate
3333 µg/m³ — Poor
4040 µg/m³ — Unhealthy
Jul
Aug
Sep
Oct
Nov
Dec
5454 µg/m³ — Very Unhealthy
5454 µg/m³ — Very Unhealthy
3737 µg/m³ — Unhealthy
2828 µg/m³ — Poor
2424 µg/m³ — Moderate
2626 µg/m³ — Poor
Best months: Feb, Apr, NovWorst months: Jun–Aug
Moderate15–25 µg/m³Poor25–35 µg/m³Unhealthy35–50 µg/m³Very Unhealthy50–75 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Lesotho
Maseru: 32.7 µg/m³. Typical range in Lesotho: 28.2–32.7 µg/m³. Low anchor: Maputsoe, 23.3 µg/m³. High anchor: Thaba-Tseka, 39.5 µg/m³.
10 cities tracked