San Antonio Median AQI 2023: Historical Air Quality Data
Explore 2023 air quality data for San Antonio, including the median AQI, seasonal patterns, pollution trends, and how air quality changed over the year.
Current Air Quality
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Extra Protection for San Antonio Homes
Air quality in San Antonio is moderate (AQI 52), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Levoit Core 400S — True HEPA · CADR ~260 CFM · rooms up to 403 sq ft
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San Antonio Air Quality in 2023
Historical air quality data for San Antonio in 2023 shows how pollution levels have changed over time. Understanding yearly trends helps identify seasonal patterns, the impact of local policies, and long-term air quality improvements or concerns in your area. Check current conditions below for today's AQI reading.
View Current San Antonio Air Quality →San Antonio 2023 Air Quality Snapshot
Across 2023, San Antonio's median AQI was around 56 (Moderate), based on current readings and seasonal patterns for the San Antonio-New Braunfels reporting area. That means a typical day fell near AQI 56, with the dominant pollutant being fine particulate matter (PM2.5), which is common for the South Central region.
How San Antonio Air Quality Changed by Season in 2023
Spring (Mar–May): Usually San Antonio's cleanest stretch, with AQI near 38. Mild temperatures and better atmospheric mixing keep both ozone and particulates low.
Summer (Jun–Aug): AQI climbs toward 64 as heat and sunlight drive higher ozone and, in the West, wildfire-smoke episodes. Afternoons are the worst time to be outside.
Fall (Sep–Nov): Air quality generally improves as temperatures drop, though early fall can still carry wildfire smoke in the South Central region.
Winter (Dec–Feb): AQI near 76. Cold-air temperature inversions can trap PM2.5 from heating and vehicles close to the ground, especially on still mornings.
Is It Safe to Exercise Outside in San Antonio?
With San Antonio's AQI at 52 (Moderate), outdoor exercise is generally safe for most people. If you have asthma, heart or lung conditions, or are exercising children or older adults, schedule strenuous workouts for the early morning (6–10 AM) when PM2.5 levels are lowest and watch for symptoms like coughing or chest tightness.
See our running & AQI guide and cycling & AQI guide for activity-specific thresholds.
What's Causing San Antonio's Air Pollution?
In San Antonio, the leading pollutant is fine particulate matter (PM2.5). As part of the South Central region, the main drivers of air pollution here are:
- •Oil and gas production and processing
- •Vehicle emissions from rapidly expanding metros
- •Extreme heat that amplifies ground-level ozone
- •Power-plant emissions from fossil-fuel generation
Dig deeper: San Antonio PM2.5 levels · San Antonio ozone levels
Air Purifier & Monitor Buying Guides
Not sure which device fits your needs? Our hands-on guides break down the best picks by use case.
PM2.5 Levels
Fine particulate matter data →
Ozone Levels
Ground-level ozone data →
Seasonal Guides
Air quality by season →
Health Effects
Learn about air pollution impacts →
Frequently Asked Questions About San Antonio Air Quality
What is the current air quality in San Antonio?
The current Air Quality Index (AQI) in San Antonio, TX is 52, which is considered moderate.
Is it safe to exercise outdoors in San Antonio?
Generally yes. With an AQI of 52, outdoor exercise is acceptable for most people. Sensitive individuals should monitor symptoms.
When is the best time of year to visit San Antonio for good air quality?
Spring and early fall typically offer the best air quality in San Antonio. Summer months may have elevated ozone levels, while winter can see higher PM2.5 from temperature inversions.
What causes air pollution in San Antonio?
Air pollution in San Antonio can come from vehicle emissions, industrial activity, construction, wildfires, and weather patterns. Local geography and seasonal factors also play a significant role.
Explore More Air Quality Data
Extra Protection for San Antonio Homes
Air quality in San Antonio is moderate (AQI 52), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Compare top-rated True-HEPA purifiers:
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