SmogRank / Germany / Saarland / Ludweiler-Warndt
Ludweiler-Warndt, month by month
Ludweiler-Warndt has a measured daily mean on 503 days since 5 February 2025. Its worst month was February 2025, at 66 US AQI (17.0 µg/m³), 758th of 2,633 cities on that month's world ranking. Its cleanest was September 2025, at 24 US AQI (4.4 µg/m³).
Every month since 2025
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
4 months
| Month | Why |
|---|---|
| Oct 2026 | 5 of 12 days measured; a month needs 9. The others: 3 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks. |
| Sep 2026 | 6 of 30 days measured; a month needs 21. The others: 24 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | 13 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| 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. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Ludweiler-Warndt's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 6617.0 µg/m³ | 758thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| January 2026 | 6214.9 µg/m³ | 765thof 2,617 | Europe, January and February 2026 |
| March 2026 | 5913.2 µg/m³ | 1,037thof 2,971 | – |
| March 2025 | 5813.1 µg/m³ | 1,104thof 2,862 | Germany, Poland and 25 more countries, March 2025 Europe, 14 February to 1 March 2025 |
| December 2025 | 5410.9 µg/m³ | 1,149thof 3,006 | – |
| November 2025 | 5310.4 µg/m³ | 955thof 2,715 | – |
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.
Ludweiler-Warndt's worst days
| Day | US AQI | Episode |
|---|---|---|
| 25 Jan 2026 | 12043.4 µg/m³ | Europe, January and February 2026 |
| 15 Aug 2026 | 9834.4 µg/m³ | Germany, Belgium and 2 more countries, August 2026 |
| 10 Feb 2025 | 9733.6 µg/m³ | Europe, 1 to 14 February 2025 |
| 24 Jan 2026 | 9532.9 µg/m³ | Europe, January and February 2026 |
| 17 Aug 2026 | 9432.3 µg/m³ | Germany, Belgium and 2 more countries, August 2026 |
| 22 Jan 2026 | 9130.6 µg/m³ | Europe, January and February 2026 |
| 12 Mar 2025 | 8527.2 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 8 Feb 2025 | 8426.7 µg/m³ | Europe, 1 to 14 February 2025 |
| 23 Jan 2026 | 8225.6 µg/m³ | Europe, January and February 2026 |
| 19 Feb 2025 | 8125.0 µg/m³ | Europe, 14 February to 1 March 2025 |
Daily means, the highest since 5 Feb 2025; 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, Ludweiler-Warndt, Germany, 5 Feb 2025 – 10 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/de/ludweiler-warndt/history (accessed 13 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.
Ludweiler-Warndt now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 01:07 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).