SmogRank / Austria / Lower Austria / Tulln
Tulln, month by month
Tulln has a measured daily mean on 1,021 days since 1 January 2023. Its worst month was February 2025, at 75 US AQI (21.9 µg/m³), 420th of 2,633 cities on that month's world ranking. Its cleanest was September 2025, at 30 US AQI (5.4 µg/m³). 2025 averaged 54 US AQI (10.7 µg/m³), against 49 US AQI (8.8 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
13 months
| Month | Why |
|---|---|
| Oct 2025 | 13 of 31 days measured; a month needs 22. The others: 12 with no readings from the monitors, 6 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 monitors, 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 monitors, 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 | 9 of 30 days measured; a month needs 21. The others: 21 with readings for part of the day (a day needs 18 hours). |
| 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 monitors, 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 monitors, 10 with readings for part of the day (a day needs 18 hours). |
| 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.
Tulln's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 7521.9 µg/m³ | 420thof 2,633 | Europe, 14 February to 1 March 2025 |
| January 2026 | 7521.8 µg/m³ | 340thof 2,617 | Europe, January and February 2026 Eastern Europe, January 2026and 1 more |
| January 2024 | 6416.0 µg/m³ | 407thof 2,385 | Europe, 8 to 27 January 2024 |
| March 2026 | 6416.0 µg/m³ | 761stof 2,971 | Europe, 1 to 12 March 2026 |
| March 2025 | 6315.6 µg/m³ | 893rdof 2,862 | Germany, Poland and 25 more countries, March 2025 Europe, 14 February to 1 March 2025 |
| January 2025 | 6315.5 µg/m³ | 462ndof 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.
Tulln's worst days
| Day | US AQI | Episode |
|---|---|---|
| 14 Jan 2026 | 11039.0 µg/m³ | Europe, January and February 2026 |
| 15 Jan 2026 | 10938.6 µg/m³ | Europe, January and February 2026 |
| 25 Jan 2026 | 10637.6 µg/m³ | Europe, January and February 2026 |
| 4 Mar 2026 | 10637.6 µg/m³ | Europe, 1 to 12 March 2026 |
| 6 Dec 2023 | 10637.5 µg/m³ | Europe, December 2023 |
| 10 Jan 2026 | 10537.3 µg/m³ | Eastern Europe, January 2026 |
| 12 Jan 2024 | 10035.3 µg/m³ | Europe, 8 to 27 January 2024 |
| 1 Jan 2023 | 9834.3 µg/m³ | Eastern Europe, January 2023 |
| 10 Jan 2024 | 9834.2 µg/m³ | Europe, 8 to 27 January 2024 |
| 2 Feb 2026 | 9834.1 µg/m³ | Europe, January and February 2026 |
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, Tulln, Austria, 1 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/at/tulln/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.
Tulln 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).