What is the air quality trend in La Unión?

Over the past 21 days, La Unión had an average AQI of 77 based on station measurements. The worst day was 2026-07-22 with AQI 158.

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.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

425h

PM2.5 Station

425h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	25	25–25	6.0 µg/m³	1h	1
2026-08-07	55	13–141	16.6 µg/m³	22h	2
2026-08-06	69	36–155	21.0 µg/m³	24h	3
2026-08-05	80	35–178	28.0 µg/m³	24h	3
2026-08-04	64	23–157	19.6 µg/m³	24h	3
2026-08-03	65	18–121	19.5 µg/m³	22h	3
2026-08-02	52	4–149	15.1 µg/m³	21h	2
2026-08-01	56	7–163	17.6 µg/m³	22h	2
2026-07-31	50	7–137	15.0 µg/m³	20h	2
2026-07-30	80	8–162	29.2 µg/m³	21h	2
2026-07-29	112	18–371	55.4 µg/m³	23h	2
2026-07-28	57	4–310	24.4 µg/m³	19h	2
2026-07-27	72	8–267	31.4 µg/m³	22h	1
2026-07-26	113	25–260	60.1 µg/m³	23h	1
2026-07-25	103	4–391	53.4 µg/m³	23h	1
2026-07-24	106	14–204	46.2 µg/m³	18h	1
2026-07-23	50	4–156	16.2 µg/m³	19h	1
2026-07-22	158	3–481	123.5 µg/m³	15h	1
2026-07-21	127	22–311	73.1 µg/m³	20h	3
2026-07-20	71	5–172	25.2 µg/m³	23h	3
2026-07-19	61	26–156	18.1 µg/m³	19h	3

Back to La Unión Air Quality