Lousã vs Santiago do Cacém AQI Comparison

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

Lower average AQI: Santiago do Cacém (31-pt gap)PM2.5: Lousã 18.3 ug/m3 · Santiago do Cacém 7.3 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-01-01–2024-12-31 and 2024-01-01–2024-12-30.

Compare two cities

City A

City B

Lousã vs Santiago do Cacém

Lousã

Coimbra, Portugal

PM2.5: 18.3 ug/m3
PM10: 17.5 ug/m3
Worst month: December
Trend: n/a

EPA category: Moderate

Santiago do Cacém

Setúbal, Portugal

PM2.5: 7.3 ug/m3
PM10: 13.9 ug/m3
Worst month: November
Trend: n/a

EPA category: Good

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

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Lousã

101

102

Santiago do Cacém

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.