What is the air quality trend in Machalí?

Over the past 15 days, Machalí had an average AQI of 38 based on station measurements. The worst day was 2026-08-24 with AQI 50.

How is Machalí air quality measured?

Air quality in Machalí 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 Machalí, Chile

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

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

107

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

175h

PM2.5 Station

175h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	33	25–46	7.9 µg/m³	4h	2
2026-09-04	40	20–65	10.1 µg/m³	12h	1
2026-09-03	41	25–62	10.3 µg/m³	12h	2
2026-09-02	36	7–57	8.9 µg/m³	13h	2
2026-09-01	40	6–112	10.9 µg/m³	13h	2
2026-08-31	37	10–98	10.0 µg/m³	12h	1
2026-08-30	39	22–68	10.0 µg/m³	11h	1
2026-08-29	40	5–76	10.3 µg/m³	13h	1
2026-08-28	34	5–78	8.8 µg/m³	14h	1
2026-08-27	40	21–74	10.4 µg/m³	11h	1
2026-08-26	34	19–59	8.4 µg/m³	12h	1
2026-08-25	50	15–117	14.4 µg/m³	14h	1
2026-08-24	50	13–119	14.5 µg/m³	14h	1
2026-08-23	41	1–142	11.7 µg/m³	15h	1
2026-08-22	27	15–50	6.5 µg/m³	5h	1

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