Air quality in Concord, California, United States of America today
Mr. Duck’s Air Quality Score
Good air today for Concord, California, 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 Concord, California is rated as Good today. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 9.0 µg/m³ based on seven valid observations reported through OpenAQ.
Overall conditions meet the Good category criteria, and the data reflect the current state of particulate matter in the area. 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 Concord pulls in seven separate measurement rows, one for each of the listed pollutants – carbon monoxide (CO), nitric oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), ozone (O₃), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All seven rows come from a single monitoring location in the city, so each pollutant is represented by just one observation rather than a network of stations.
Every reading was last refreshed on 2026-02-10 at 23:00 UTC, which places all data comfortably within the “updated within 7 days” freshness bucket. Because each pollutant has only one recorded value, the statistical spread is effectively zero: the minimum, median and maximum are identical for every metric. For example, CO registers at 0.3 ppm, NO at 0.0011 ppm, NO₂ at 0.0071 ppm, NOX at 0.0082 ppm, O₃ at 0.017 ppm, PM2.5 at 9.0 µg/m³ and SO₂ at 0.0002 ppm. The percentile figures (10th and 90th) match these same numbers, confirming the lack of variation in the current snapshot.
With only a single row per pollutant, the coverage is limited; there are no older or unknown‑timestamp entries to show longer‑term trends, and the dataset does not capture spatial differences across Concord. Consequently, while the figures give an immediate picture of the city’s air quality at one moment, they do not reflect how conditions might change throughout the day or vary between neighborhoods. Users should keep in mind that this snapshot represents a narrow slice of data rather than a comprehensive, continuously updated monitoring network.
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 reflects seven valid measurements and is updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 23:00 UTC. This snapshot provides a current view of Concord’s air quality but conditions can differ across neighborhoods and change throughout the day, so localized variations may not be captured in these figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Concord | co | 0.3 | ppm | 2026-02-10 23:00 UTC |
| Concord | no | 0.0011 | ppm | 2026-02-10 23:00 UTC |
| Concord | no2 | 0.0070999999999999995 | ppm | 2026-02-10 23:00 UTC |
| Concord | nox | 0.008199999999999999 | ppm | 2026-02-10 23:00 UTC |
| Concord | o3 | 0.017 | ppm | 2026-02-10 23:00 UTC |
| Concord | pm25 | 9.0 | µg/m³ | 2026-02-10 23:00 UTC |
| Concord | so2 | 0.0002 | ppm | 2026-02-10 23:00 UTC |