Coyhaique, located to the east of the Andes mountain range, was the most polluted city in Chile in 2024, based on fine air particulate matter concentration (PM2.5). Throughout the year, the city had an average particulate matter concentration of 40.5 micrograms per cubic meter. Coyhaique also ranked as the second most polluted city in Latin America that year. The World Health Organization's air quality standards recommend a maximum annual average concentration of 10 μg/m³. Chile's capital Santiago reported an average PM2.5 concentration of 17.3 μg/m³ that year.
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IQAir. (March 11, 2025). Average PM2.5 concentration in the most polluted cities in Chile in 2024 (in micrograms per cubic meter of air) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 15, 2026, from /statistics/1119448/chile-air-pollution-city/
IQAir. "Average PM2.5 concentration in the most polluted cities in Chile in 2024 (in micrograms per cubic meter of air)." Chart. March 11, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 15, 2026. /statistics/1119448/chile-air-pollution-city/
IQAir. (2025). Average PM2.5 concentration in the most polluted cities in Chile in 2024 (in micrograms per cubic meter of air). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 15, 2026. /statistics/1119448/chile-air-pollution-city/
IQAir. "Average Pm2.5 Concentration in The Most Polluted Cities in Chile in 2024 (in Micrograms per Cubic Meter of Air)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 11 Mar 2025, /statistics/1119448/chile-air-pollution-city/
IQAir, Average PM2.5 concentration in the most polluted cities in Chile in 2024 (in micrograms per cubic meter of air) ÌÇÐÄÆƽâ°æ, /statistics/1119448/chile-air-pollution-city/ (last visited July 15, 2026)
Average PM2.5 concentration in the most polluted cities in Chile in 2024 (in micrograms per cubic meter of air) [Graph], IQAir, March 11, 2025. [Online]. Available: /statistics/1119448/chile-air-pollution-city/
