Air Quality Lab — Liberia, Costa Rica
Air Quality Profile·
Liberia reports an annual PM2.5 of 16.0 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Liberia
Costa Rica
Costa RicaAnnual Average
ModerateWHO annual classification
16.0µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
1414 µg/m³ — Fair
1515 µg/m³ — Moderate
1515 µg/m³ — Fair
1515 µg/m³ — Moderate
1414 µg/m³ — Fair
1515 µg/m³ — Fair
1919 µg/m³ — Moderate
1717 µg/m³ — Moderate
1717 µg/m³ — Moderate
1919 µg/m³ — Moderate
1818 µg/m³ — Moderate
1616 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
1414 µg/m³ — Fair
1515 µg/m³ — Moderate
1515 µg/m³ — Fair
1515 µg/m³ — Moderate
1414 µg/m³ — Fair
1515 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1919 µg/m³ — Moderate
1717 µg/m³ — Moderate
1717 µg/m³ — Moderate
1919 µg/m³ — Moderate
1818 µg/m³ — Moderate
1616 µg/m³ — Moderate
Best months: Jan, Mar, MayWorst months: Jul, Oct–Nov
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 Costa Rica
Liberia: 16.0 µg/m³. Typical range in Costa Rica: 14.9–16.0 µg/m³. Low anchor: Puntarenas, 12.3 µg/m³. High anchor: San José, 18.4 µg/m³.
18 cities tracked