What is the air quality trend in La Unión?

Over the past 20 days, La Unión had an average AQI of 122 based on station measurements. The worst day was 2026-05-26 with AQI 181.

How is La Unión air quality measured?

Air quality in La Unión 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 La Unión, Chile

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

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

212

Current AQI
Very unhealthy Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

458h

PM2.5 Station

458h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-08	161	75–345	95.6 µg/m³	21h	2
2026-06-07	65	25–320	26.8 µg/m³	23h	2
2026-06-06	102	15–184	43.1 µg/m³	24h	2
2026-06-05	158	35–364	94.2 µg/m³	23h	2
2026-06-04	139	21–473	85.6 µg/m³	22h	2
2026-06-03	102	7–357	46.4 µg/m³	23h	2
2026-06-02	63	8–157	19.7 µg/m³	24h	2
2026-06-01	109	9–188	46.2 µg/m³	22h	1
2026-05-31	133	52–468	77.6 µg/m³	23h	2
2026-05-30	75	8–269	34.0 µg/m³	22h	2
2026-05-29	127	27–221	56.8 µg/m³	23h	2
2026-05-28	87	24–188	33.7 µg/m³	24h	2
2026-05-27	173	33–366	104.8 µg/m³	23h	2
2026-05-26	181	61–487	113.4 µg/m³	24h	2
2026-05-25	116	42–373	57.3 µg/m³	24h	2
2026-05-24	108	57–195	44.5 µg/m³	24h	2
2026-05-23	154	46–500	120.0 µg/m³	24h	2
2026-05-22	158	15–414	91.0 µg/m³	22h	2
2026-05-21	117	7–243	61.8 µg/m³	19h	2
2026-05-20	121	25–263	58.9 µg/m³	24h	2

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