Air quality in Krefeld, North Rhine-Westphalia, Germany today

Mr. Duck’s Air Quality Score

Good air today for Krefeld, North Rhine-Westphalia, Germany

⚠️ 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 Krefeld today is classified as Good. The primary pollutant measured is PM2.5 (fine particles). According to the latest data, the PM2.5 concentration stands at 7.597 µg/m³ while the accompanying PM10 level is 20.706 µg/m³, based on six valid measurements.

These values are presented through OpenAQ and reflect the current monitoring snapshot for Krefeld, North Rhine‑Westphalia, Germany. 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 Krefeld air‑quality dataset currently contains measurements for five pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM10) and particulate matter 2.5 µm or less (PM2.5). These values come from a total of seven recorded rows, but they are drawn from only two distinct monitoring sites: the Hafen location supplies NO and NO₂ data, while the Linn site provides PM10, PM2.5 and O₃ readings.

Freshness varies across the pollutants. The most recent updates for PM10, PM2.5 and O₃ were recorded on 2026‑02‑10 at 17:00 UTC, meaning they have been refreshed within the last three days. NO₂ shares this same timestamp, also updated on 2026‑02‑10 at 17:00 UTC. In contrast, the NO measurement is older, with its latest entry dated 2024‑03‑11 at 07:00 UTC and flagged as old data. This uneven timing shows that while most of the dataset reflects current conditions, one key pollutant (NO) relies on a snapshot that is nearly two years out of date.

The numeric spread highlights modest variability for the particulate matter series: PM10 values range from 7.5 to 20.7 µg/m³ with a median of about 14.1 µg/m³, and PM2.5 spans 4.8 to 7.6 µg/m³ with a median near 6.2 µg/m³. Ozone is represented by a single value of 19.2 µg/m³, and NO₂ appears as a solitary reading of 34.5 µg/m³. Because the dataset relies on only two stations, spatial coverage across Krefeld is limited; conditions can differ in other neighbourhoods or at times not captured by these recent measurements.

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 Krefeld are based on six valid measurements and were updated within three days, with the latest refresh recorded at 2026‑02‑10T17:00:00+00:00. These figures provide a recent snapshot of citywide air quality but reflect conditions only at the specific monitoring sites and times; actual pollutant levels can differ across neighborhoods and throughout the day.

OpenAQ station rows