What is the air quality trend in San Antonio?

Over the past 8 days, San Antonio had an average AQI of 66 based on station measurements. The worst day was 2026-07-22 with AQI 123.

How is San Antonio air quality measured?

Air quality in San Antonio 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 San Antonio, Chile

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

134h

PM2.5 Station

134h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	123	95–144	44.2 µg/m³	5h	1
2026-07-21	55	12–124	16.0 µg/m³	24h	1
2026-07-20	81	29–161	27.2 µg/m³	22h	1
2026-07-19	83	17–180	32.1 µg/m³	23h	1
2026-07-18	35	8–78	9.4 µg/m³	20h	1
2026-07-17	34	8–80	9.0 µg/m³	17h	1
2026-07-16	48	8–147	15.2 µg/m³	10h	1
2026-07-15	70	42–87	21.2 µg/m³	13h	1

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