What is the air quality trend in Antofagasta?

Over the past 20 days, Antofagasta had an average AQI of 63 based on station measurements. The worst day was 2026-05-26 with AQI 116.

How is Antofagasta air quality measured?

Air quality in Antofagasta 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 Antofagasta, Chile

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	52	11–100	15.2 µg/m³	17h	1
2026-05-28	65	17–161	21.4 µg/m³	16h	2
2026-05-27	63	20–174	21.7 µg/m³	17h	1
2026-05-26	116	17–364	65.2 µg/m³	13h	1
2026-05-25	92	23–182	36.9 µg/m³	13h	2
2026-05-24	53	17–98	15.2 µg/m³	15h	1
2026-05-23	64	1–162	22.5 µg/m³	20h	2
2026-05-22	61	2–154	19.9 µg/m³	17h	1
2026-05-21	41	11–100	11.6 µg/m³	18h	1
2026-05-20	86	8–305	40.2 µg/m³	15h	2
2026-05-19	69	18–164	22.9 µg/m³	17h	2
2026-05-18	52	10–153	15.8 µg/m³	17h	2
2026-05-17	48	7–159	15.9 µg/m³	16h	1
2026-05-16	57	7–152	17.4 µg/m³	17h	1
2026-05-15	53	4–139	15.5 µg/m³	19h	1
2026-05-14	52	10–97	15.1 µg/m³	19h	1
2026-05-13	61	12–198	24.0 µg/m³	16h	2
2026-05-12	76	26–195	27.8 µg/m³	19h	2
2026-05-11	58	5–160	18.8 µg/m³	17h	2
2026-05-10	56	21–157	17.8 µg/m³	15h	2

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