Ad Dir‘īyah vs Dhahran AQI Comparison

Side-by-side OpenAQ-derived air quality comparison for Ad Dir‘īyah and Dhahran. Values use mapped daily PM2.5 and PM10 observations normalized to US EPA AQI.

Lower average AQI: Ad Dir‘īyah (39-pt gap)PM2.5: Ad Dir‘īyah 23.7 ug/m3 · Dhahran 42.6 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-10-26–2024-12-31 and 2024-10-26–2024-12-31.

Compare two cities

City A

City B

Ad Dir‘īyah vs Dhahran

Ad Dir‘īyah

Ar Riyāḑ, Saudi Arabia

PM2.5: 23.7 ug/m3
PM10: 30.0 ug/m3
Worst month: November
Trend: n/a

EPA category: Moderate

Dhahran

Ash Sharqīyah, Saudi Arabia

116

PM2.5: 42.6 ug/m3
PM10: 48.5 ug/m3
Worst month: December
Trend: n/a

EPA category: Unhealthy for Sensitive Groups

Lower average AQI in this selected period: Ad Dir‘īyah. Values are historical OpenAQ-derived city summaries, not live readings.

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Ad Dir‘īyah

Dhahran

111

126

What this comparison measures

Average EPA AQI — city-level daily AQI values averaged across the OpenAQ coverage window.
PM2.5 and PM10 — mapped monitor concentrations aggregated to daily city averages.
Seasonality — worst and cleanest months from the monthly city rollups.
Trend — difference between the earliest and latest yearly AQI average in this build.