Copenhagen vs Lystrup AQI Comparison

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

Lower average AQI: Copenhagen (16-pt gap)PM2.5: Copenhagen 7.2 ug/m3 · Lystrup 11.1 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-09-06–2024-12-31 and 2024-10-15–2024-12-31.

Compare two cities

City A

City B

Copenhagen vs Lystrup

Copenhagen

Hovedstaden, Denmark

PM2.5: 7.2 ug/m3
PM10: 8.3 ug/m3
Worst month: September
Trend: n/a

EPA category: Good

Lystrup

Midtjylland, Denmark

PM2.5: 11.1 ug/m3
PM10: 12.1 ug/m3
Worst month: October
Trend: n/a

EPA category: Good

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

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Copenhagen

Lystrup

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.