Kostel vs Polzela AQI Comparison

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

Lower average AQI: Kostel (81-pt gap)PM2.5: Kostel 7.7 ug/m3 · Polzela 38.8 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-01-03–2024-12-31 and 2024-11-07–2024-12-31.

Compare two cities

City A

City B

Kostel vs Polzela

Kostel

Kostel, Slovenia

PM2.5: 7.7 ug/m3
PM10: 13.3 ug/m3
Worst month: November
Trend: n/a

EPA category: Good

Polzela

Polzela, Slovenia

108

PM2.5: 38.8 ug/m3
PM10: 44.7 ug/m3
Worst month: November
Trend: n/a

EPA category: Unhealthy for Sensitive Groups

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

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Kostel

Polzela

114

102

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.