Air Quality Lab — Umm Hājar, Chad
Air Quality Profile·
Umm Hājar reports an annual PM2.5 of 32.8 µg/m³. That's above the EU annual limit of 25 µg/m³ — long-term exposure here carries documented health trade-offs.
Umm Hājar
Chad
ChadAnnual Average
PoorWHO annual classification
32.8µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
3333 µg/m³ — Poor
4646 µg/m³ — Unhealthy
5353 µg/m³ — Very Unhealthy
4646 µg/m³ — Unhealthy
3232 µg/m³ — Poor
3333 µg/m³ — Poor
2424 µg/m³ — Moderate
2121 µg/m³ — Moderate
2323 µg/m³ — Moderate
2929 µg/m³ — Poor
2424 µg/m³ — Moderate
2828 µg/m³ — Poor
Jan
Feb
Mar
Apr
May
Jun
3333 µg/m³ — Poor
4646 µg/m³ — Unhealthy
5353 µg/m³ — Very Unhealthy
4646 µg/m³ — Unhealthy
3232 µg/m³ — Poor
3333 µg/m³ — Poor
Jul
Aug
Sep
Oct
Nov
Dec
2424 µg/m³ — Moderate
2121 µg/m³ — Moderate
2323 µg/m³ — Moderate
2929 µg/m³ — Poor
2424 µg/m³ — Moderate
2828 µg/m³ — Poor
Best months: Aug–Sep, NovWorst months: Feb–Apr
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 Chad
Umm Hājar: 32.8 µg/m³. Typical range in Chad: 29.3–36.8 µg/m³. Low anchor: Goz Beida, 23.9 µg/m³. High anchor: N'Djamena, 48.6 µg/m³.
45 cities tracked