Nacimiento vs Salamanca AQI Comparison

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

Lower average AQI: Salamanca (50-pt gap)PM2.5: Nacimiento 46.5 ug/m3 · Salamanca 15.4 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-01-01–2025-01-01 and 2024-01-01–2024-12-31.

Compare two cities

City A

City B

Nacimiento vs Salamanca

Nacimiento

Biobío, Chile

113

PM2.5: 46.5 ug/m3
PM10: 56.9 ug/m3
Worst month: May
Trend: n/a

EPA category: Unhealthy for Sensitive Groups

Salamanca

Coquimbo, Chile

PM2.5: 15.4 ug/m3
PM10: 26.1 ug/m3
Worst month: November
Trend: n/a

EPA category: Moderate

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

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Nacimiento

113

181

142

166

154

104

Salamanca

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.