Air quality in Hitachinaka, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Hitachinaka, 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 Hitachinaka is currently classified as Moderate. The primary pollutant identified for today is PM2.5 (fine particles).
Measurements show a PM2.5 concentration of 14.0 µg/m³, based on five valid observations reported through OpenAQ. No PM10 reference value is available 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 Hitachinaka includes five measured pollutants—nitric oxide (NO), nitrogen dioxide (NO₂), combined nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂)—all recorded at a single monitoring site located at ひたちなか市東石川２－１０－１. Each pollutant is represented by one row, giving a total of five rows in the current feed.
All observations were last updated on 2026-02-10 22:00 UTC, which falls within the “updated within 3 days” freshness window, so the data are recent for every compound. The values show very little variation across the reporting period: NO and SO₂ both register a constant 0.0 ppm (minimum, median and maximum), while NO₂ and NOX each hold a steady 0.009 ppm with identical 10th‑percentile and 90th‑percentile figures. PM2.5 is likewise uniform at 14.0 µg/m³ for its minimum, median and maximum.
Because the dataset comes from only one station, it captures conditions at that specific address but does not reflect spatial differences that may exist elsewhere in Hitachinaka. The lack of variability in each pollutant’s statistics suggests either a stable local environment during the reporting window or limited temporal resolution in the sample set. Users should keep in mind that air quality can change across neighborhoods and over time, so these figures represent a snapshot rather than a comprehensive city‑wide picture.
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 Hitachinaka is based on five valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑10T22:00:00+00:00 (Updated within 3 days). This snapshot reflects conditions captured at that time; however, air quality can vary across different neighborhoods and throughout the day, so values may differ from what you experience in other parts of the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| ひたちなか市東石川２－１０－１ | no | 0.0 | ppm | 2026-02-10 22:00 UTC |
| ひたちなか市東石川２－１０－１ | no2 | 0.009 | ppm | 2026-02-10 22:00 UTC |
| ひたちなか市東石川２－１０－１ | nox | 0.009 | ppm | 2026-02-10 22:00 UTC |
| ひたちなか市東石川２－１０－１ | pm25 | 14.0 | µg/m³ | 2026-02-10 22:00 UTC |
| ひたちなか市東石川２－１０－１ | so2 | 0.0 | ppm | 2026-02-10 22:00 UTC |