What is the air quality trend in Arauco?

Over the past 20 days, Arauco had an average AQI of 63 based on station measurements. The worst day was 2026-05-20 with AQI 89.

How is Arauco air quality measured?

Air quality in Arauco 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 Arauco, Chile

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

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

155

Current AQI
Unhealthy Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

472h

PM2.5 Station

472h · 2 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	76	25–232	27.8 µg/m³	23h	5
2026-05-28	54	16–121	15.6 µg/m³	24h	7
2026-05-27	66	15–167	21.5 µg/m³	23h	7
2026-05-26	75	12–157	24.7 µg/m³	24h	7
2026-05-25	81	24–172	27.9 µg/m³	23h	7
2026-05-24	63	25–112	18.7 µg/m³	24h	6
2026-05-23	76	25–159	24.8 µg/m³	24h	7
2026-05-22	65	28–145	19.7 µg/m³	24h	6
2026-05-21	65	25–162	20.1 µg/m³	24h	6
2026-05-20	89	35–190	33.0 µg/m³	24h	6
2026-05-19	71	17–176	24.8 µg/m³	24h	6
2026-05-18	63	11–164	20.5 µg/m³	23h	5
2026-05-17	58	12–149	18.1 µg/m³	21h	6
2026-05-16	45	10–102	12.1 µg/m³	23h	8
2026-05-15	55	16–175	17.5 µg/m³	24h	9
2026-05-14	47	24–75	12.3 µg/m³	24h	10
2026-05-13	65	32–109	19.0 µg/m³	24h	10
2026-05-12	59	26–106	16.9 µg/m³	24h	10
2026-05-11	51	20–82	14.1 µg/m³	24h	10
2026-05-10	48	12–81	13.1 µg/m³	24h	10

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