Air quality in Houston, Texas, United States of America today

Mr. Duck’s Air Quality Score

Good air today for Houston, British Columbia, Canada

⚠️ 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 Houston today is classified as Good. The primary pollutant measured is PM2.5, with a reported concentration of 3.45 µg/m³ (reference value). A secondary reference for larger particles shows PM10 at 50.0 µg/m³. Measurements were taken from 81 valid monitoring points and are displayed via OpenAQ.

Data reflect the current conditions without interpretation or recommendation. 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 Houston air‑quality dataset pulls in measurements from 75 monitoring sites spread across the city, representing a total of 114 individual data rows. It includes concentrations for carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter of three size fractions (PM1, PM2.5 and PM10), relative humidity, sulfur dioxide (SO₂), temperature, and particle counts (UM003). Most pollutants have very recent observations: the latest PM2.5 reading of 3.445 µg/m³ was recorded at MATHC North Side on 2026‑02‑11 01:00 UTC; O₃, PM10, PM1, relative humidity, temperature and UM003 all show last updates between 2026‑02‑10 and 2026‑02‑11. In contrast, the NO₂ data are dated back to 2016‑03‑06 20:00 UTC, indicating that this metric is currently based on older information.

Across the recent records, PM2.5 values range from a low of 0 µg/m³ up to a high of 7 045.9 µg/m³, with a median near 6.73 µg/m³, showing a very wide spread but typical concentrations clustering in the single‑digit range. Ozone levels are tightly clustered between 0.031 and 0.041 ppm, with a median of 0.039 ppm, while PM10 values sit between about 5.3 and 50 µg/m³ (median ≈6.45 µg/m³). Temperature readings from the same recent period vary from roughly 17.5 °C to 24.2 °C, median 23.1 °C, and relative humidity spans 25.9 % to 58.3 %, median 54.3 %. Particle counts (UM003) cover 333 to 1 390 particles/cm³, median around 1 029.

Because the dataset contains a mix of very fresh data for most pollutants but older entries for NO₂, users should keep in mind that conditions can differ across neighborhoods and over time, especially where recent measurements are lacking.

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 set for Houston includes 81 valid measurements and is Updated today (last refreshed at 2026‑02‑11T01:00:00+00:00). These values represent the most recent readings available from our monitoring network, but air quality can vary by location and time within the city, so conditions you experience may differ from this snapshot.

OpenAQ station rows