Air quality in Columbus, Ohio, United States of America today

Mr. Duck’s Air Quality Score

Moderate air today for Columbus, Indiana, 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 Columbus today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 10.6 and a PM10 reference value of 21.0, based on ten valid observations collected via OpenAQ.

These figures reflect the current state of ambient particulate matter in the city. 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 Columbus pulls OpenAQ sensor readings across fifteen recent‑time entries drawn from four monitoring sites. It covers a suite of pollutants and atmospheric variables: carbon monoxide (CO), nitrogen dioxide (NO₂, shown as NO2), ozone (O₃, shown as O3), particulate matter of three size fractions (PM1, PM2.5, PM10), sulfur dioxide (SO₂, shown as SO2), relative humidity, temperature and an additional metric labeled UM003.

Freshness varies by pollutant. CO, NO₂ and PM2.5 each have a most‑recent timestamp of 2026‑02‑10 23:00 UTC, meaning the latest values are less than a day old. PM10 also updates on that same date, while SO₂ and O₃ are older, last recorded on 2020‑05‑25 15:00 UTC and 2025‑11‑01 05:00 UTC respectively. The PM1 and relative humidity entries lack timestamps, so their recency cannot be determined.

Across the available measurements, PM2.5 values range from a low of 0.0 µg/m³ to a high of 35.3 µg/m³, with a median of about 29.6 µg/m³ and most readings (10th‑90th percentile) clustered between roughly 8.6 and 33.8 µg/m³. NO₂ spans from 0.004 to 0.016 ppm, centering near 0.01 ppm; the bulk of observations sit between 0.0052 and 0.0148 ppm. PM10 is comparatively narrow, moving between 41 and 49 µg/m³ with a median of 45 µg/m³. CO shows a single reported value of 0.2 ppm, while SO₂ appears as a constant –0.001 ppm in the limited historic record.

Because several pollutants rely on only one or two recent rows and some variables have no timestamp at all, the picture of air quality in Columbus is uneven. Conditions can differ markedly across neighborhoods and over time, so the available data should be viewed as a snapshot rather than a comprehensive, city‑wide assessment.

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 ten valid measurements and was updated today (2026‑02‑11T00:00:00+00:00). This snapshot represents the air quality conditions recorded across Columbus, Ohio at a single point in time; actual pollutant levels can differ by neighborhood, micro‑climate, and hour‑to‑hour variations throughout the city.

OpenAQ station rows