What is the air quality trend in Rancagua?

Over the past 15 days, Rancagua had an average AQI of 41 based on station measurements. The worst day was 2026-09-01 with AQI 57.

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 Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

277h

PM2.5 Station

277h · 3 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	38	17–74	9.7 µg/m³	12h	4
2026-09-04	34	11–53	8.1 µg/m³	17h	3
2026-09-03	38	5–66	9.3 µg/m³	21h	4
2026-09-02	37	18–76	9.3 µg/m³	19h	4
2026-09-01	57	27–127	16.1 µg/m³	22h	4
2026-08-31	45	15–110	12.0 µg/m³	20h	3
2026-08-30	40	21–63	9.8 µg/m³	13h	3
2026-08-29	41	9–59	10.2 µg/m³	18h	3
2026-08-28	34	5–78	8.8 µg/m³	22h	3
2026-08-27	38	12–79	9.8 µg/m³	19h	3
2026-08-26	42	26–62	10.6 µg/m³	20h	4
2026-08-25	42	15–117	11.6 µg/m³	22h	2
2026-08-24	46	15–119	13.2 µg/m³	24h	3
2026-08-23	41	8–75	10.8 µg/m³	21h	3
2026-08-22	53	28–75	14.6 µg/m³	7h	4

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