What is the air quality trend in San Antonio?

Over the past 15 days, San Antonio had an average AQI of 63 based on station measurements. The worst day was 2026-07-25 with AQI 90.

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
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

293h

PM2.5 Station

293h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	75	17–110	26.0 µg/m³	3h	1
2026-08-07	75	25–142	24.1 µg/m³	15h	1
2026-08-06	37	8–158	11.0 µg/m³	24h	1
2026-08-05	80	50–142	25.6 µg/m³	23h	1
2026-08-04	68	33–129	20.2 µg/m³	24h	1
2026-08-03	52	21–91	14.3 µg/m³	15h	1
2026-08-02	63	12–119	19.9 µg/m³	9h	1
2026-08-01	74	21–153	24.0 µg/m³	22h	1
2026-07-31	37	8–91	10.5 µg/m³	23h	1
2026-07-30	63	8–156	19.6 µg/m³	24h	1
2026-07-29	56	38–82	15.2 µg/m³	23h	1
2026-07-28	56	17–161	16.9 µg/m³	24h	1
2026-07-27	52	8–97	15.4 µg/m³	24h	1
2026-07-26	71	29–124	22.1 µg/m³	22h	1
2026-07-25	90	72–158	30.8 µg/m³	18h	1

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