What is the air quality trend in Antofagasta?

Over the past 15 days, Antofagasta had an average AQI of 48 based on station measurements. The worst day was 2026-07-11 with AQI 72.

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
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

221h

PM2.5 Station

221h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	42	21–70	11.1 µg/m³	8h	2
2026-07-21	39	1–70	10.2 µg/m³	17h	1
2026-07-20	44	12–109	11.6 µg/m³	18h	2
2026-07-19	40	26–61	9.9 µg/m³	16h	2
2026-07-18	43	21–56	10.6 µg/m³	15h	2
2026-07-17	52	17–149	15.0 µg/m³	13h	1
2026-07-16	53	12–148	15.3 µg/m³	16h	2
2026-07-15	56	21–122	16.2 µg/m³	16h	2
2026-07-14	39	11–60	9.5 µg/m³	16h	1
2026-07-13	59	10–280	25.5 µg/m³	17h	1
2026-07-12	50	16–175	16.9 µg/m³	16h	2
2026-07-11	72	16–205	29.9 µg/m³	14h	2
2026-07-10	56	9–139	17.3 µg/m³	17h	1
2026-07-09	47	5–153	14.0 µg/m³	16h	1
2026-07-08	41	15–70	10.9 µg/m³	6h	2

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