Air quality in Chigasaki, Japan today
Mr. Duck’s Air Quality Score
Good air today for Chigasaki, Japan
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Chigasaki is classified as Good today. The primary pollutant identified is PM2.5, fine particulate matter measured by the monitoring network.
According to OpenAQ data, the latest reading shows a PM2.5 concentration of 1.0 µg/m³ based on five valid measurements. No other pollutants reached the reporting threshold for 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 dataset for Chigasaki includes five measured pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX) and fine particulate matter (PM2.5). All of these come from a single monitoring location identified as 茅ヶ崎市茅ヶ崎１－２３４０－１, so the city’s coverage in this snapshot is limited to one station row per pollutant.
Each pollutant shows an identical freshness profile: the most recent reading was recorded on 2026-02-10 at 22:00 UTC and is flagged as updated within three days. Because there is only one data point for each substance, the reported range is effectively zero – the minimum, median, and maximum values are all the same (CO 0.1 ppm, NO 0.001 ppm, NO₂ 0.005 ppm, NOX 0.006 ppm, PM2.5 1.0 µg/m³). This lack of variability means the dataset does not capture any temporal or spatial fluctuations that might occur across different parts of Chigasaki or over longer periods.
The single‑station coverage and uniform timestamps indicate that the current picture is a snapshot rather than a continuous, city‑wide monitoring network. While the data are recent, they represent conditions at only one point in the city at a specific moment; actual air quality elsewhere in Chigasaki could differ. Users should keep in mind that broader trends or localized spikes cannot be assessed from this limited set of observations.
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 five valid measurements and is updated within 3 days, with the latest refresh recorded at 2026‑02‑10T22:00:00+00:00. These values represent a snapshot of conditions across Chigasaki and may not capture short‑term fluctuations or differences between neighborhoods. For the most accurate assessment, consider local variations in time and location when interpreting the air quality information.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 茅ヶ崎市茅ヶ崎１－２３４０－１ | co | 0.1 | ppm | 2026-02-10 22:00 UTC |
| 茅ヶ崎市茅ヶ崎１－２３４０－１ | no | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 茅ヶ崎市茅ヶ崎１－２３４０－１ | no2 | 0.005 | ppm | 2026-02-10 22:00 UTC |
| 茅ヶ崎市茅ヶ崎１－２３４０－１ | nox | 0.006 | ppm | 2026-02-10 22:00 UTC |
| 茅ヶ崎市茅ヶ崎１－２３４０－１ | pm25 | 1.0 | µg/m³ | 2026-02-10 22:00 UTC |