Air quality in Hirakata, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Hirakata, Japan

⚠️ 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 Hirakata today falls into the Moderate category. The primary pollutant identified is PM2.5 (fine particles).

Measurements show a PM2.5 concentration of 14.0 µg/m³ based on ten valid observations reported through OpenAQ. 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 Hirakata air‑quality feed contains data for six pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM₂.5) and sulfur dioxide (SO₂). The dataset is built from ten individual measurement rows that come from two monitoring sites, all of which reported their most recent values on 2026‑02‑10 at 22:00 UTC, so the information is current within the last three days.

Across the ten rows the observed concentrations span a modest range. CO is recorded at a single value of 0.3 ppm, while SO₂ registers consistently at 0.0 ppm, indicating no detectable sulfur dioxide in the sampled period. Nitrogen oxide levels vary from a low of 0.002 ppm to a high of 0.016 ppm, with a median of 0.009 ppm; NO₂ ranges between 0.016 and 0.024 ppm (median 0.020 ppm); and the combined NOX metric shows values from 0.018 up to 0.040 ppm (median about 0.029 ppm). PM₂.5 measurements are expressed in micrograms per cubic metre, ranging from 10.0 to 14.0 µg/m³ with a median of 12.0 µg/m³.

The coverage is uneven: while CO and SO₂ each have only one distinct reading across all rows, the nitrogen‑oxide family and PM₂.5 are represented by multiple observations that capture a broader spread. Because the data come from just two stations, spatial variation within Hirakata cannot be resolved; conditions may differ in other neighbourhoods or at times outside the latest reporting window. Nonetheless, the dataset provides a recent snapshot of six key pollutants for the city, with all values refreshed on the same date and time.

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 refreshed recently—updated within three days, with the latest update recorded at 2026‑02‑10 22:00 UTC. While this snapshot provides a reliable overview of current conditions in Hirakata, air quality can differ across neighborhoods and change throughout the day, so values may vary locally and over short time intervals.

OpenAQ station rows