SmogRank / Germany / Thuringia / Kahla
Kahla, month by month
Kahla has a measured daily mean on 917 days since 6 May 2023. Its worst month was February 2025, at 67 US AQI (17.5 µg/m³), 722nd of 2,633 cities on that month's world ranking. Its cleanest was November 2023, at 21 US AQI (3.8 µg/m³). 2025 averaged 42 US AQI (7.6 µg/m³), against 39 US AQI (7.0 µg/m³) in 2024.
Every month since 2023
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
14 months
| Month | Why |
|---|---|
| Sep 2026 | 20 of 30 days measured; a month needs 21. The others: 10 with readings for part of the day (a day needs 18 hours). |
| Jun 2026 | 18 of 30 days measured; a month needs 21. The others: 7 with no readings from the monitor, 5 with readings for part of the day (a day needs 18 hours). |
| Dec 2025 | 16 of 31 days measured; a month needs 22. The others: 15 with readings for part of the day (a day needs 18 hours). |
| Nov 2025 | 6 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 23 with readings for part of the day (a day needs 18 hours). |
| Oct 2025 | 16 of 31 days measured; a month needs 22. The others: 15 with readings for part of the day (a day needs 18 hours). |
| Jun 2025 | 18 of 30 days measured; a month needs 21. The others: 12 with readings for part of the day (a day needs 18 hours). |
| Oct 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 1 with no readings from the monitor, 29 with readings for part of the day (a day needs 18 hours). |
| Aug 2024 | 15 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 15 with readings for part of the day (a day needs 18 hours). |
| Mar 2024 | 15 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 6 with readings for part of the day (a day needs 18 hours). |
| Oct 2023 | 9 of 31 days measured; a month needs 22. The others: 21 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours). |
| Sep 2023 | 1 of 30 days measured; a month needs 21. The others: 22 with no readings from the monitor, 7 with readings for part of the day (a day needs 18 hours). |
| Aug 2023 | No day measured. The others: 31 with no readings from the monitor. |
| Jul 2023 | 14 of 31 days measured; a month needs 22. The others: 16 with no readings from the monitor, 1 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Kahla's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 6717.5 µg/m³ | 722ndof 2,633 | Europe, 1 to 14 February 2025 |
| January 2026 | 6215.1 µg/m³ | 750thof 2,617 | Europe, January and February 2026 Europe, December 2025 to January 2026 |
| March 2025 | 6114.2 µg/m³ | 1,014thof 2,862 | Germany, Poland and 25 more countries, March 2025 |
| February 2026 | 5511.4 µg/m³ | 1,114thof 2,866 | Europe, January and February 2026 |
| March 2026 | 5310.3 µg/m³ | 1,593rdof 2,971 | Europe, 18 to 25 March 2026 |
| January 2024 | 509.0 µg/m³ | 1,022ndof 2,385 | Europe, 8 to 27 January 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.
Kahla's worst days
| Day | US AQI | Episode |
|---|---|---|
| 13 Feb 2025 | 13348.3 µg/m³ | Europe, 1 to 14 February 2025 |
| 25 Jan 2026 | 13147.5 µg/m³ | Europe, January and February 2026 |
| 10 Feb 2025 | 12846.6 µg/m³ | Europe, 1 to 14 February 2025 |
| 5 Feb 2026 | 12645.5 µg/m³ | Europe, January and February 2026 |
| 10 Jan 2024 | 12344.3 µg/m³ | Europe, 8 to 27 January 2024 |
| 30 Mar 2024 | 11541.2 µg/m³ | Europe, March and April 2024 |
| 11 Jan 2024 | 11240.0 µg/m³ | Europe, 8 to 27 January 2024 |
| 10 Mar 2025 | 11139.6 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 31 Mar 2024 | 9934.6 µg/m³ | Europe, March and April 2024 |
| 24 Jan 2026 | 9733.8 µg/m³ | Europe, January and February 2026 |
Daily means, the highest since 6 May 2023; 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, Kahla, Germany, 6 May 2023 – 10 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/de/kahla/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.
Kahla now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).