Air Quality Lab — Usulután, El Salvador
Air Quality Profile·
Usulután reports an annual PM2.5 of 17.0 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Usulután
El Salvador
El SalvadorAnnual Average
ModerateWHO annual classification
17.0µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
1313 µg/m³ — Fair
1515 µg/m³ — Fair
1111 µg/m³ — Fair
2424 µg/m³ — Moderate
2121 µg/m³ — Moderate
1818 µg/m³ — Moderate
1616 µg/m³ — Moderate
1818 µg/m³ — Moderate
2020 µg/m³ — Moderate
2020 µg/m³ — Moderate
1515 µg/m³ — Fair
1414 µg/m³ — Fair
Jan
Feb
Mar
Apr
May
Jun
1313 µg/m³ — Fair
1515 µg/m³ — Fair
1111 µg/m³ — Fair
2424 µg/m³ — Moderate
2121 µg/m³ — Moderate
1818 µg/m³ — Moderate
Jul
Aug
Sep
Oct
Nov
Dec
1616 µg/m³ — Moderate
1818 µg/m³ — Moderate
2020 µg/m³ — Moderate
2020 µg/m³ — Moderate
1515 µg/m³ — Fair
1414 µg/m³ — Fair
Best months: Jan, Mar, DecWorst months: Apr–May, Oct
Fair10–15 µg/m³Moderate15–25 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across El Salvador
Usulután: 17.0 µg/m³. Typical range in El Salvador: 15.9–21.5 µg/m³. Low anchor: Puerto El Triunfo, 14.9 µg/m³. High anchor: San Salvador, 24.6 µg/m³.
24 cities tracked