Rijeka vs Zagreb AQI Comparison

Side-by-side OpenAQ-derived air quality comparison for Rijeka and Zagreb. Values use mapped daily PM2.5 and PM10 observations normalized to US EPA AQI.

Lower average AQI: Rijeka (47-pt gap)PM2.5: Rijeka 10.1 ug/m3 · Zagreb 47.4 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-01-01–2024-12-31 and 2024-09-27–2024-12-31.

Compare two cities

City A

City B

Rijeka vs Zagreb

Rijeka

Zagreb, Croatia

PM2.5: 10.1 ug/m3
PM10: 12.4 ug/m3
Worst month: August
Trend: n/a

EPA category: Good

Zagreb

Zagreb, Grad, Croatia

PM2.5: 47.4 ug/m3
PM10: 43.4 ug/m3
Worst month: December
Trend: n/a

EPA category: Moderate

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

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Rijeka

Zagreb

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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.