Air quality in Brewster County, Texas, United States of America today
Mr. Duck’s Air Quality Score
Good air today for Brewster County, Texas, United States of America
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Brewster County, Texas is rated as Good today. The primary pollutant measured is PM2.5. The most recent observation, recorded on 2026-02-23 12:00 UTC, shows a PM2.5 concentration of 1.9 µg/m³. This value is based on two valid measurements from local monitoring stations. Two separate instruments contributed to the dataset, providing redundancy. The measurement reflects ambient conditions at the time of sampling. Data is shown via OpenAQ.
PM10 data is not available for this assessment, so only PM2.5 information is presented. Because PM10 is not measured, the air quality index relies solely on the PM2.5 reading. The Good category reflects that the measured pollutant levels are low according to the criteria used for the rating. The Good rating is consistent with the low concentration observed. 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 dataset for Brewster County, Texas, contains measurements for two pollutants: ozone (O3) and fine particulate matter (PM2.5). Both are reported from a single monitoring location identified as Big Bend National Park, meaning the entire city’s air‑quality picture is derived from one set of sensors. In total there are two data rows, one for each pollutant, and each row corresponds to the same station, so the coverage is limited to that specific site rather than a network of monitors spread across the county.
The ozone record is the most recent entry, with a timestamp of 2026‑02‑10 23:00 UTC, which falls within the last 30 days and is therefore considered up‑to‑date. By contrast, the PM2.5 observation was last refreshed on 2026‑01‑23 21:00 UTC, which the source flags as “old data.” This difference in freshness shows that while ozone information reflects current conditions, the particulate‑matter figure may not capture any changes that have occurred since late January.
Both pollutants show a single recorded value with no observed spread. Ozone is consistently reported at 0.034 ppm, with the minimum, median, and maximum all equal to that figure. Likewise, PM2.5 is recorded at 1.9 µg/m³ across the board, again with identical minimum, median and maximum values. The lack of variation indicates that the dataset provides only a snapshot rather than a range of measurements over time. Because the data come from one location and, for PM2.5, are older, they may not represent the full spatial or temporal diversity of air quality across Brewster County, and conditions can differ in other parts of the city or at later dates.
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
This data set includes two valid measurements and is updated within 30 days. The most recent reading was recorded on 2026-02-10T23:00:00+00:00. Please note that air quality can vary by location and time within Brewster County, Texas, so this snapshot may not represent conditions everywhere in the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Big Bend NP | o3 | 0.034 | ppm | 2026-02-10 23:00 UTC |
| Big Bend NP | pm25 | 1.9 | µg/m³ | 2026-01-23 21:00 UTC |