Aarau vs Allschwil AQI Comparison

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

Lower average AQI: Allschwil (1-pt gap)PM2.5: Aarau 17.8 ug/m3 · Allschwil 18.4 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-07-22–2024-12-31 and 2024-09-08–2024-12-31.

Compare two cities

City A

City B

Aarau vs Allschwil

Aarau

Aargau, Switzerland

PM2.5: 17.8 ug/m3
PM10: 19.0 ug/m3
Worst month: December
Trend: n/a

EPA category: Moderate

Allschwil

Basel-Landschaft, Switzerland

PM2.5: 18.4 ug/m3
PM10: 19.6 ug/m3
Worst month: December
Trend: n/a

EPA category: Moderate

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

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Aarau

Allschwil

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.