Air quality in DeKalb County, Georgia, United States of America today

Mr. Duck’s Air Quality Score

Moderate air today for DeKalb County, Georgia, 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 today in DeKalb County, Georgia is rated as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 33.8 and a PM10 reference value of 20.0 based on ten valid observations collected via OpenAQ.

These values reflect the current monitoring snapshot for the area. No additional pollutants are highlighted in this assessment. 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 DeKalb County air‑quality dataset currently contains measurements for eight pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), ozone (O₃), particulate matter ≤10 µm (PM₁₀), particulate matter ≤2.5 µm (PM₂.₅) and sulfur dioxide (SO₂). These values come from 12 individual data rows collected at two monitoring stations, identified as “South DeKalb” and “NR‑285”. All records are marked as having been updated within the past seven days, with the most recent timestamps ranging from 2026‑02‑10 01:00 UTC (the PM₂.₅ reading) to 2026‑02‑10 23:00 UTC for the other pollutants.

The coverage across pollutants is uneven. CO, O₃, PM₁₀ and SO₂ each have a single recent observation, all recorded at South DeKalb on 2026‑02‑10 23:00 UTC, with values of 0.2 ppm, 0.036 ppm, 20.0 µg/m³ and 0.0002 ppm respectively. In contrast, NO, NO₂ and NOX each have two recent rows from NR‑285, showing a maximum of 0.0003 ppm for NO, 0.0075 ppm for both NO₂ and NOX, and median values near the low‑hundredths of a ppm. PM₂.₅ provides the broadest range: the minimum recorded is 0 µg/m³, the median sits at 16.9 µg/m³, and the maximum reaches 33.8 µg/m³, all from South DeKalb on 2026‑02‑10 01:00 UTC.

Because only two stations contribute data, spatial variation within the county is not fully captured, and the limited number of rows means that short‑term fluctuations may be missed. Nonetheless, the dataset offers a recent snapshot of key gases and particles, with most values clustered tightly around their medians except for PM₂.₅, which shows a wider spread across its observed range.

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 reflect ten valid measurements and are Updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 23:00 UTC. This snapshot provides a brief view of current conditions; air quality can differ across neighborhoods and change throughout the day, so values may vary locally and over short time periods.

OpenAQ station rows