SmogRank / Germany / Schleswig-Holstein / Halstenbek
Halstenbek, month by month
Halstenbek has a measured daily mean on 794 days since 29 January 2024. Its worst month was February 2025, at 72 US AQI (20.2 µg/m³), 557th of 2,633 cities on that month's world ranking. Its cleanest was September 2025, at 25 US AQI (4.5 µg/m³).
Every month since 2024
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Months without a mean, and why
7 months
| Month | Why |
|---|---|
| Sep 2026 | 19 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 10 with readings for part of the day (a day needs 18 hours). |
| Jun 2025 | 20 of 30 days measured; a month needs 21. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Jan 2024 | 3 of 31 days measured; a month needs 22. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Halstenbek's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 7220.2 µg/m³ | 557thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| January 2026 | 7119.6 µg/m³ | 450thof 2,617 | Europe, January and February 2026 |
| March 2025 | 7019.4 µg/m³ | 610thof 2,862 | Europe, March 2025 Germany, Poland and 25 more countries, March 2025and 1 more |
| February 2026 | 7019.2 µg/m³ | 584thof 2,866 | Germany, Poland and Czechia, February 2026 Europe, January and February 2026 |
| March 2026 | 6114.5 µg/m³ | 894thof 2,971 | Europe, 18 to 25 March 2026 Europe, 1 to 12 March 2026 |
| November 2024 | 5611.6 µg/m³ | 614thof 2,624 | Europe, November 2024 |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Halstenbek's worst days
| Day | US AQI | Episode |
|---|---|---|
| 23 Jan 2026 | 16474.4 µg/m³ | Europe, January and February 2026 |
| 10 Mar 2025 | 14151.6 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 24 Jan 2026 | 13649.9 µg/m³ | Europe, January and February 2026 |
| 25 Jan 2026 | 12244.2 µg/m³ | Europe, January and February 2026 |
| 13 Feb 2025 | 11541.1 µg/m³ | Europe, 1 to 14 February 2025 |
| 4 Mar 2024 | 11340.2 µg/m³ | Europe, February and March 2024 |
| 9 Nov 2024 | 11239.9 µg/m³ | Europe, November 2024 |
| 6 Feb 2026 | 11139.7 µg/m³ | Europe, January and February 2026 |
| 17 Feb 2026 | 10838.2 µg/m³ | Germany, Poland and Czechia, February 2026 |
| 8 Mar 2026 | 10738.0 µg/m³ | Europe, 1 to 12 March 2026 |
Daily means, the highest since 29 Jan 2024; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Halstenbek, Germany, 29 Jan 2024 – 10 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/de/halstenbek/history (accessed 12 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Halstenbek now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 17:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).