Air Quality Lab — Nicoya, Costa Rica
Air Quality Profile·
Nicoya 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.
Nicoya
Costa Rica
Costa RicaAnnual Average
FairWHO annual classification
14.9µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
1313 µg/m³ — Fair
1515 µg/m³ — Fair
1313 µg/m³ — Fair
1515 µg/m³ — Moderate
1414 µg/m³ — Fair
1414 µg/m³ — Fair
1717 µg/m³ — Moderate
1717 µg/m³ — Moderate
1616 µg/m³ — Moderate
1616 µg/m³ — Moderate
1616 µg/m³ — Moderate
1414 µg/m³ — Fair
Jan
Feb
Mar
Apr
May
Jun
1313 µg/m³ — Fair
1515 µg/m³ — Fair
1313 µg/m³ — Fair
1515 µg/m³ — Moderate
1414 µg/m³ — Fair
1414 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1717 µg/m³ — Moderate
1717 µg/m³ — Moderate
1616 µg/m³ — Moderate
1616 µg/m³ — Moderate
1616 µg/m³ — Moderate
1414 µg/m³ — Fair
Best months: Jan, Mar, JunWorst months: Jul–Aug, 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
Nicoya: 14.9 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