Air quality in Piraeus, Attica, Greece today

Mr. Duck’s Air Quality Score

Good air today for Piraeus, Attica, 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 Piraeus today is classified as Good. The primary pollutant measured is PM2.5, with a recorded concentration of 9.0 µg/m³, while the accompanying PM10 level stands at 34.0 µg/m³ based on ten valid observations.

Data is shown via OpenAQ and reflects the current monitoring results 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 dataset for Piraeus includes measurements of carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM₁₀), particulate matter 2.5 µm or less (PM₂.₅) and sulfur dioxide (SO₂). Data come from two monitoring stations that together contributed 20 individual rows of observations. For most pollutants the latest reading was recorded on 2026‑02‑10 at 20:00 UTC, which means the information is fresh – updated within the past three days. The exception is NO, whose newest entry dates back to 2024‑03‑11 at 12:00 UTC and is therefore classified as old data.

Across the recent measurements the observed values span a wide range. CO levels vary from a minimum of 1 300 µg/m³ to a maximum of 2 000 µg/m³, with a median around 1 500 µg/m³, indicating consistently high concentrations in the available samples. NO₂ shows a tighter band, ranging between 56 and 64 µg/m³ and centering near 60 µg/m³. Ozone values are modest, from 11 to 20 µg/m³ with a median of 17 µg/m³. Particulate matter is relatively low: PM₁₀ ranges from 18 to 34 µg/m³ (median 31 µg/m³) and PM₂.₅ from 5 to 9 µg/m³ (median 7 µg/m³). Sulfur dioxide spans 2 to 13 µg/m³, with a median of 12 µg/m³.

The coverage is uneven: while CO, NO₂, O₃, PM₁₀, PM₂.₅ and SO₂ all have recent data from both stations, NO relies on an older single entry, limiting insight into its current behaviour. Because the dataset contains only two stations, conditions can differ across neighborhoods and times not captured here, so the figures represent a snapshot rather than a complete 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 dataset for Piraeus includes ten valid measurements and is updated within three days, with the most recent data recorded on 2026‑02‑10 at 20:00 UTC. These figures represent a snapshot of ambient conditions across the city; air quality can differ by specific location and time of day, so values may not reflect conditions everywhere in Piraeus at any given moment.

OpenAQ station rows