SmogRank / Austria / Styria / Leibnitz
Leibnitz, month by month
Leibnitz has a measured daily mean on 988 days since 1 January 2023. Its worst month was January 2026, at 95 US AQI (32.5 µg/m³), 150th of 2,617 cities on that month's world ranking. Its cleanest was September 2025, at 20 US AQI (3.6 µg/m³). 2025 averaged 54 US AQI (10.7 µg/m³), against 55 US AQI (11.4 µg/m³) in 2023.
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 |
|---|---|
| Oct 2025 | 12 of 31 days measured; a month needs 22. The others: 12 with no readings from the monitor, 7 with readings for part of the day (a day needs 18 hours). |
| Nov 2024 | 7 of 30 days measured; a month needs 21. The others: 23 with readings for part of the day (a day needs 18 hours). |
| Oct 2024 | 3 of 31 days measured; a month needs 22. The others: 28 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 21 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours). |
| Aug 2024 | 5 of 31 days measured; a month needs 22. The others: 17 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours). |
| Jul 2024 | 9 of 31 days measured; a month needs 22. The others: 22 with readings for part of the day (a day needs 18 hours). |
| Jun 2024 | 7 of 30 days measured; a month needs 21. The others: 21 with readings for part of the day (a day needs 18 hours), 2 with readings left out by our checks. |
| May 2024 | 11 of 31 days measured; a month needs 22. The others: 20 with readings for part of the day (a day needs 18 hours). |
| Apr 2024 | 11 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 18 with readings for part of the day (a day needs 18 hours). |
| Mar 2024 | 11 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 10 with readings for part of the day (a day needs 18 hours). |
| Apr 2023 | 19 of 30 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), 3 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: 1 with readings for part of the day (a day needs 18 hours), 25 missing from OpenAQ's archive. |
| Jan 2023 | 9 of 31 days measured; a month needs 22. The others: 15 with readings for part of the day (a day needs 18 hours), 7 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Leibnitz's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2026 | 9532.5 µg/m³ | 150thof 2,617 | Europe, January and February 2026 |
| February 2025 | 9029.8 µg/m³ | 217thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| January 2024 | 8426.8 µg/m³ | 150thof 2,385 | – |
| December 2023 | 8426.6 µg/m³ | 83rdof 2,247 | Italy, Bosnia and Herzegovina and 2 more countries, December 2023 South-eastern Europe, 11 to 13 December 2023and 1 more |
| December 2024 | 7119.9 µg/m³ | 271stof 2,616 | Europe, 24 December 2024 to 3 January 2025 |
| January 2025 | 6918.7 µg/m³ | 341stof 2,474 | Europe, 24 December 2024 to 3 January 2025 |
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.
Leibnitz's worst days
| Day | US AQI | Episode |
|---|---|---|
| 24 Jan 2026 | 16575.0 µg/m³ | Europe, January and February 2026 |
| 23 Jan 2026 | 16372.3 µg/m³ | Europe, January and February 2026 |
| 23 Feb 2025 | 15358.4 µg/m³ | Europe, 14 February to 1 March 2025 |
| 15 Jan 2026 | 14453.1 µg/m³ | Europe, January and February 2026 |
| 1 Jan 2023 | 14252.1 µg/m³ | Eastern Europe, January 2023 |
| 8 Feb 2025 | 13950.9 µg/m³ | Europe, 1 to 14 February 2025 |
| 1 Jan 2025 | 13850.6 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 25 Jan 2026 | 13649.8 µg/m³ | Europe, January and February 2026 |
| 17 Jan 2026 | 13549.4 µg/m³ | Europe, January and February 2026 |
| 9 Feb 2025 | 13247.9 µg/m³ | Europe, 1 to 14 February 2025 |
Daily means, the highest since 1 Jan 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, Leibnitz, Austria, 1 Jan 2023 – 12 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/at/leibnitz/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.
Leibnitz now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).