WorldArrow iconCosta Rica

Air quality in Costa Rica

Air quality index (AQI⁺) and PM2.5 air pollution in Costa Rica • 13:13, Jul 19

2025 country air quality average

How polluted is Costa Rica?

IQAir exclamation icon

In 2025 in Costa Rica, the annual PM2.5 concentration was 1.2 times the WHO annual PM2.5 guideline.

2025 AQI⁺ country ranking

Which country had the worst air quality in 2025?

#CountryPopulationAQI⁺ US
1
The national flag of Costa Rica

Pakistan

231,402,117

159

2
The national flag of Costa Rica

Bangladesh

169,356,251

158

3
The national flag of Costa Rica

Tajikistan

9,750,064

152

4
The national flag of Costa Rica

Chad

17,179,740

146

5
The national flag of Costa Rica

Democratic Republic of the Congo

95,894,118

137

6
The national flag of Costa Rica

India

1,407,563,842

134

7
The national flag of Costa Rica

Kuwait

4,250,114

126

8
The national flag of Costa Rica

Uganda

45,853,778

119

9
The national flag of Costa Rica

Egypt

109,262,178

114

10
The national flag of Costa Rica

Uzbekistan

34,915,100

107

126
The national flag of Costa Rica

Costa Rica

5,153,957

34

Worldwide PM2.5 ranking

2025 Costa Rica global rank in air pollution

126/143

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Which is the most polluted state in Costa Rica?