Niel vs Saint-Vith AQI Comparison

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

Lower average AQI: Saint-Vith (43-pt gap)PM2.5: Niel 16.4 ug/m3 · Saint-Vith 3.4 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-06-01–2024-12-31 and 2024-01-01–2024-12-31.

Compare two cities

City A

City B

Niel vs Saint-Vith

Niel

Flanders, Belgium

PM2.5: 16.4 ug/m3
PM10: 17.9 ug/m3
Worst month: December
Trend: n/a

EPA category: Moderate

Saint-Vith

Wallonia, Belgium

PM2.5: 3.4 ug/m3
PM10: 6.8 ug/m3
Worst month: August
Trend: n/a

EPA category: Good

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

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Niel

Saint-Vith

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.