Quito Air Quality Guide - Sources, Seasons, and Health Implications

A guide to air quality in Quito, Ecuador - sources, seasonal patterns, health implications, and how to track conditions in real time.

Air quality overview

Quito is a city of approximately 2,011,000 residents in Ecuador. Based on multi-year averages, its air quality runs generally good but episodically affected by regional events.

See live readings: Quito live AQI →

What drives air pollution in Quito

The dominant pollution sources affecting Ecuador cities like Quito are:

• vehicle emissions
• industrial activity
• residential energy use
• regional dust or biomass burning
• construction and dust

Seasonal pattern

Air quality varies seasonally based on local meteorology, fuel use, and regional fire/dust events.

Geography and meteorology

Quito sits at approximately -0.23° latitude, -78.51° longitude. Local geography (basins, coastal exposure, elevation) heavily influences pollution accumulation patterns.

Health implications

Most people will rarely face health risk from air quality alone. Sensitive individuals should still check during pollution events. The most-studied pollutant for population health is fine particulate matter (PM2.5). Exposure is linked to cardiovascular disease, respiratory illness, and increased mortality. Children, the elderly, and people with respiratory or cardiac conditions face elevated risk.

Other pollutants commonly elevated in urban areas:

• Ozone (O3) - peaks on hot, sunny afternoons
• Nitrogen dioxide (NO2) - traffic-correlated, peaks at rush hours
• PM10 - includes road dust and coarse particles

Policy and trajectory

Air quality policies vary widely across jurisdictions. Coverage and enforcement levels affect outcomes more than nominal standards.

Practical guidance for residents and visitors

1. Check the AQI before outdoor exercise. If readings exceed 100, sensitive groups should reduce intensity. Above 150, everyone should consider shifting indoors.
2. Wear an N95 or KN95 during peaks. Cloth masks do not filter PM2.5.
3. Run a HEPA air purifier in bedrooms. Indoor levels typically track 50-70% of outdoor levels in unfiltered homes - see our air purifier buyer's guide.
4. Use mechanical ventilation with HEPA filtration when AQI is high; avoid simply opening windows.
5. Subscribe to free email alerts for Quito - we email when AQI crosses your threshold: set up alerts →

How we track Quito

Live readings refresh every 30 minutes via atmos.today. See methodology and attribution for data sources.

Compare nearby and notable cities

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Live Quito air quality: /ecuador/quito. Methodology: /about. Reviewed: May 2, 2026.