April 12, 2026: Riyadh among top 10 most polluted cities in the world

  • 3 min read
  • by IQAir Staff Writers
April 12, 2026: Riyadh among top 10 most polluted cities in the world

Is the air quality good in Riyadh?

As of April 12, 2026, at 10:00 AM local time, Riyadh, Saudi Arabia, is experiencing very poor air quality with the Air Quality Index (AQI) above 200, placing conditions in the very unhealthy range.

These conditions may increase the risk of respiratory issues, worsen heart problems, and impair lung function, particularly for children, the elderly, and people with underlying health conditions.

Air quality conditions can change rapidly throughout the day. For a complete, real-time view of current pollution levels, see Riyadh's air quality map.

While the air quality conditions today are unusually poor, it is worth noting that Riyadh’s 2025 average PM2.5 concentration was 28.8 µg/m³, corresponding to an AQI of 86 (“moderate”), 5.76 times the WHO annual guideline of 5 µg/m³.

Riyadh, Saudi Arabia, ranked among the most polluted major cities as of April 12, 2026, at 10:00 AM. Source: IQAir.

Air quality map of Riyadh, Saudi Arabia, as of April 12, 2026, at 10:00 AM local time. Source: IQAir.

When will the air quality improve in Riyadh?

Air quality is expected to remain poor throughout today, with conditions improving into the moderate range by tomorrow, although minor fluctuations may occur.

Hourly air quality forecast for Riyadh, Saudi Arabia, as of April 12, 2026, at 10:00 AM local time. Source: IQAir.

Daily trend data indicates that air quality in Riyadh typically remains in the good to moderate range. However, over the past few days, conditions have spiked to unhealthy levels, making outdoor activities potentially unsafe for extended exposure.

Daily air quality trends in Riyadh, Saudi Arabia, over the past 30 days. Source: IQAir.

What is causing poor air quality in Riyadh?

Riyadh’s polluted air results from a mix of natural and human‑driven sources. Frequent desert dust and sandstorms lift large amounts of particulate matter into the atmosphere, contributing to elevated PM10 levels.

Rapid urbanization and heavy reliance on private vehicles generate significant emissions of nitrogen oxides and fine particles. Industrial activities and energy sector emissions add to the pollution burden, while construction and cement production contribute additional particulates (1).

The city’s arid climate and stagnant conditions further hinder dispersion, trapping pollutants at ground level.

How can I protect myself from poor air quality?

Article resources

[1] Faqeih K.Y., El Melki M.N., Alamri S.M., et al. Projected Urban Air Pollution in Riyadh Using CMIP6 and Bayesian Modeling. Sustainability. (2025). DOI:10.3390/su17146288.

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