SmogRank / Germany / Baden-Wurttemberg / Trochtelfingen
Trochtelfingen, month by month
Trochtelfingen has a measured daily mean on 1,004 days since 14 February 2023. Its worst month was February 2025, at 64 US AQI (16.2 µg/m³), 808th of 2,633 cities on that month's world ranking. Its cleanest was November 2023, at 14 US AQI (2.5 µg/m³).
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
11 months
| Month | Why |
|---|---|
| Oct 2024 | 14 of 31 days measured; a month needs 22. The others: 17 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 30 with readings for part of the day (a day needs 18 hours). |
| Aug 2024 | 12 of 31 days measured; a month needs 22. The others: 2 with no readings from the monitor, 14 with readings for part of the day (a day needs 18 hours), 3 with readings left out by our checks. |
| 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). |
| Feb 2024 | 20 of 29 days measured; a month needs 21. The others: 3 with no readings from the monitor, 5 with readings for part of the day (a day needs 18 hours), 1 missing from OpenAQ's archive. |
| Oct 2023 | 8 of 31 days measured; a month needs 22. The others: 22 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: 23 with no readings from the monitor, 6 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 | 11 of 31 days measured; a month needs 22. The others: 17 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours), 1 missing from OpenAQ's archive. |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 2 of 28 days measured; a month needs 20. The others: 13 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Trochtelfingen's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 6416.2 µg/m³ | 808thof 2,633 | Europe, 1 to 14 February 2025 |
| March 2026 | 5410.9 µg/m³ | 1,446thof 2,971 | – |
| March 2025 | 5310.3 µg/m³ | 1,545thof 2,862 | – |
| June 2023 | 529.4 µg/m³ | 883rdof 1,603 | – |
| January 2024 | 509.0 µg/m³ | 1,022ndof 2,385 | Europe, 8 to 27 January 2024 |
| May 2023 | 468.2 µg/m³ | 885thof 1,600 | – |
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.
Trochtelfingen's worst days
| Day | US AQI | Episode |
|---|---|---|
| 10 Feb 2025 | 12946.8 µg/m³ | Europe, 1 to 14 February 2025 |
| 13 Jan 2024 | 9733.8 µg/m³ | Europe, 8 to 27 January 2024 |
| 17 Aug 2026 | 9733.6 µg/m³ | Germany, Belgium and 2 more countries, August 2026 |
| 30 Mar 2024 | 9633.3 µg/m³ | Europe, March and April 2024 |
| 9 Feb 2025 | 9331.9 µg/m³ | Europe, 1 to 14 February 2025 |
| 11 Feb 2025 | 9231.0 µg/m³ | Europe, 1 to 14 February 2025 |
| 12 Jan 2024 | 9130.8 µg/m³ | Europe, 8 to 27 January 2024 |
| 11 Jan 2024 | 8226.0 µg/m³ | Europe, 8 to 27 January 2024 |
| 7 Mar 2024 | 7924.1 µg/m³ | – |
| 19 Feb 2025 | 7924.0 µg/m³ | – |
Daily means, the highest since 14 Feb 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, Trochtelfingen, Germany, 14 Feb 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/de/trochtelfingen/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.
Trochtelfingen now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).