Air quality in Chester, New Jersey, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for Chester, New Jersey, 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 Chester, New Jersey is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 11.2 µg/m³ based on six valid observations reported through OpenAQ.
These data reflect the present conditions without additional interpretation. 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 Chester air‑quality dataset contains six measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), ozone (O₃), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All values come from a single monitoring row, so the city’s coverage is limited to one reporting location.
The most recent data for every pollutant were recorded on 2026‑02‑10 at 23:00 UTC, meaning the entire set was refreshed within the last seven days. Concentrations are uniform across the record: NO registers exactly 0.001 ppm, NO₂ 0.030 ppm, NOX 0.032 ppm and O₃ 0.016 ppm; each of these pollutants shows no variation – the minimum, median, maximum, 10th‑percentile and 90th‑percentile values are identical. PM2.5 is reported as 11.2 µg/m³ with the same lack of spread, while SO₂ registers a flat 0.0 ppm.
Because there is only one row of data, the statistical range for each pollutant is effectively zero, indicating no observed fluctuation over time at this site. The dataset’s freshness is good – all six pollutants were last updated on the same recent timestamp – but the single‑station coverage means city‑wide conditions may differ elsewhere and are not captured here.
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 current dataset for Chester, New Jersey includes six valid measurements and is marked as Updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 23:00 UTC. This information reflects a brief snapshot of conditions; air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Chester | no | 0.001 | ppm | 2026-02-10 23:00 UTC |
| Chester | no2 | 0.03 | ppm | 2026-02-10 23:00 UTC |
| Chester | nox | 0.032 | ppm | 2026-02-10 23:00 UTC |
| Chester | o3 | 0.016 | ppm | 2026-02-10 23:00 UTC |
| Chester | pm25 | 11.2 | µg/m³ | 2026-02-10 23:00 UTC |
| Chester | so2 | 0.0 | ppm | 2026-02-10 23:00 UTC |