SmogRank / Germany / Lower Saxony / Uslar
Uslar, month by month
Uslar has a measured daily mean on 587 days since 6 December 2024. Its worst month was February 2025, at 65 US AQI (16.6 µg/m³), 783rd of 2,633 cities on that month's world ranking. Its cleanest was September 2025, at 23 US AQI (4.1 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
2 months
| Month | Why |
|---|---|
| Jun 2026 | 16 of 30 days measured; a month needs 21. The others: 14 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.
Uslar's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 6516.6 µg/m³ | 783rdof 2,633 | Europe, 1 to 14 February 2025 |
| January 2026 | 6114.2 µg/m³ | 800thof 2,617 | Europe, January and February 2026 |
| March 2025 | 5913.6 µg/m³ | 1,065thof 2,862 | Europe, March 2025 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 | 5310.4 µg/m³ | 1,566thof 2,971 | – |
| December 2025 | 447.9 µg/m³ | 1,872ndof 3,006 | – |
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.
Uslar's worst days
| Day | US AQI | Episode |
|---|---|---|
| 24 Jan 2026 | 14352.6 µg/m³ | Europe, January and February 2026 |
| 13 Feb 2025 | 12846.6 µg/m³ | Europe, 1 to 14 February 2025 |
| 25 Jan 2026 | 11742.1 µg/m³ | Europe, January and February 2026 |
| 10 Feb 2025 | 11641.4 µg/m³ | Europe, 1 to 14 February 2025 |
| 11 Mar 2025 | 10336.5 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 23 Jan 2026 | 9834.4 µg/m³ | Europe, January and February 2026 |
| 10 Mar 2025 | 9733.9 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 1 Feb 2026 | 9733.9 µg/m³ | Europe, January and February 2026 |
| 11 Feb 2025 | 9331.7 µg/m³ | Europe, 1 to 14 February 2025 |
| 25 Mar 2025 | 9231.2 µg/m³ | Europe, March 2025 |
Daily means, the highest since 6 Dec 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, Uslar, Germany, 6 Dec 2024 – 10 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/de/uslar/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.
Uslar 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).