Air quality in Heraklion Municipal Unit, Region of Crete, Greece today

Mr. Duck’s Air Quality Score

Good air today for Heraklion Municipal Unit, Region of Crete, Greece

⚠️ 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 Heraklion Municipal Unit is classified as Good today. The primary pollutant measured is PM2.5 (fine particles). Data from OpenAQ shows a PM2.5 reference value of 5.0 µg/m³ and a PM10 reference value of 23.0 µg/m³, based on seven valid measurements.

These figures reflect the current monitoring snapshot for 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 air‑quality feed for the Heraklion Municipal Unit includes measurements of carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM10), particulate matter ≤2.5 µm (PM2.5) and sulphur dioxide (SO₂). Data are drawn from two monitoring stations, providing a total of eight recent records across all pollutants.

The freshest timestamps are from 2026‑02‑10 12:00 UTC for NO₂ and O₃, both updated within the last three days. CO, PM10, PM2.5 and SO₂ were last refreshed on 2026‑02‑09 18:00 UTC, which is still within a week but older than the nitrogen dioxide and ozone values. Across the six pollutants, the number of recent entries varies: NO₂ and O₃ each have two recent observations, while CO, PM10, PM2.5 and SO₂ each have a single recent entry.

Observed concentrations are tightly clustered. NO₂ ranges from 2.0 to 5.0 µg/m³ with a median of 3.5 µg/m³; O₃ spans 40.0–46.0 µg/m³, median 43.0 µg/m³. CO is reported at a constant 500.0 µg/m³, PM10 consistently 23.0 µg/m³, PM2.5 at 5.0 µg/m³ and SO₂ at 2.0 µg/m³. The limited spread suggests that the current dataset captures only a narrow slice of conditions.

Because most pollutants are represented by just one or two recent rows, the picture is incomplete and may not reflect variations across different neighborhoods or times of day. Users should keep in mind that air‑quality can change rapidly, and the available data provide only a snapshot from the two stations at the recorded moments.

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 for Heraklion Municipal Unit is based on seven valid measurements and was refreshed within three days, with the latest update recorded at 2026‑02‑10 12:00 UTC. These figures represent a snapshot of conditions at the time of collection; air quality can differ across neighborhoods and change throughout the day, so actual exposure may vary from what is displayed here.

OpenAQ station rows