Hamina vs Kauniainen AQI Comparison

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

Lower average AQI: Hamina (10-pt gap)PM2.5: Hamina 3.6 ug/m3 · Kauniainen 5.5 ug/m3

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

Compare two cities

City A

City B

Hamina vs Kauniainen

Hamina

Kymenlaakso, Finland

PM2.5: 3.6 ug/m3
PM10: 5.2 ug/m3
Worst month: August
Trend: n/a

EPA category: Good

Kauniainen

Uusimaa, Finland

PM2.5: 5.5 ug/m3
PM10: 13.4 ug/m3
Worst month: March
Trend: n/a

EPA category: Good

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

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Hamina

Kauniainen

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.