Air quality in Bexar County, Texas, United States of America today

Mr. Duck’s Air Quality Score

Good air today for Bexar County, Texas, United States of America

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Bexar County, Texas is classified as Good today. The primary pollutant measured is PM2.5 (fine particles).

Seven valid measurements were recorded, with a reported PM2.5 concentration of 6.08 µg/m³. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The Bexar County air‑quality feed draws from five monitoring sites that together contribute sixteen recent data rows. All seven pollutants tracked by OpenAQ appear in the set – ozone (O3), particulate matter of 1 µm, 2.5 µm and 10 µm diameter (PM1, PM2.5, PM10), relative humidity, temperature and particle number concentration (UM003). The most current timestamps are from early February 2026; the newest reading for O3 was logged on 2026‑02‑10 at 23:00 UTC, while all other variables were last updated on 2026‑02‑11 around midnight UTC. Each of those updates is flagged as “Updated within 7 days,” indicating that the bulk of the data is fresh, though a handful of rows remain in an “unknown” freshness category.

Across the stations the measured values show considerable spread. PM2.5 concentrations range from just over one microgram per cubic metre to 61 µg/m³, with a median of 3.4 µg/m³ and a 10th‑percentile near 1.7 µg/m³, suggesting that most recent readings sit toward the lower end of the observed spectrum while occasional higher spikes occur. PM1 values are tighter, spanning roughly 3.6 to 13 µg/m³ and centering around an eight‑microgram median. Temperature in the county varied between about 21.4 °C and 25.0 °C, with a median of 22.44 °C, while relative humidity ranged from 34 % to 54 %, clustering near a mid‑40s percent median. The particle number concentration (UM003) exhibited a broad interval from roughly 450 to 1,820 particles per cubic centimetre, with the typical reading around 1,134.

Coverage is uneven: ozone and PM10 each come from only one station, so their citywide picture is limited, whereas PM2.5, temperature, humidity and UM003 benefit from multiple sites. Because some rows lack recent timestamps, conditions can differ across neighborhoods and times, and the snapshot should be interpreted as a partial view of Bexar County’s current air quality.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The data shown for Bexar County reflects seven valid measurements and was updated today (2026‑02‑11T00:00:00+00:00). This snapshot represents the most recent readings available, but air quality can vary by location and time within the county, so conditions at any specific spot may differ from what is displayed here.

OpenAQ station rows