La Libertad reports an annual PM2.5 of 14.9 µg/m³. That's roughly double the WHO 2021 guideline but still far below the EU annual limit of 25 µg/m³.
Compared across El Salvador
La Libertad: 14.9 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