What is the air quality trend in Rancagua?

Over the past 7 days, Rancagua had an average AQI of 51 based on station measurements. The worst day was 2026-07-15 with AQI 71.

How is Rancagua air quality measured?

Air quality in Rancagua is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Rancagua, Chile

Name: Rancagua Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Rancagua, Chile.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

59h

PM2.5 Station

59h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	40	11–76	10.6 µg/m³	11h	1
2026-07-20	46	11–78	12.5 µg/m³	7h	1
2026-07-19	27	18–48	6.6 µg/m³	6h	1
2026-07-18	48	29–70	12.3 µg/m³	7h	1
2026-07-17	59	9–137	17.5 µg/m³	8h	1
2026-07-16	69	25–157	22.2 µg/m³	11h	1
2026-07-15	71	18–163	24.5 µg/m³	9h	1

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