SmogRank / Poland / Łódź Voivodeship / Łódź
Łódź, month by month
Łódź has a measured daily mean on 1,122 days since 1 January 2023. Its worst month was February 2025, at 106 US AQI (37.6 µg/m³), 126th of 2,633 cities on that month's world ranking. Its cleanest was May 2024, at 41 US AQI (7.4 µg/m³). 2025 averaged 68 US AQI (18.2 µg/m³), against 61 US AQI (14.4 µg/m³) in 2024.
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
10 months
| Month | Why |
|---|---|
| Oct 2026 | 5 of 11 days measured; a month needs 8. The others: 2 with no readings from the monitors, 4 with readings for part of the day (a day needs 18 hours). |
| May 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 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. |
| Dec 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | 4 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks. |
| Aug 2023 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | 18 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| May 2023 | 19 of 31 days measured; a month needs 22. The others: 12 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.
Łódź's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 10637.6 µg/m³ | 126thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| January 2026 | 9532.7 µg/m³ | 146thof 2,617 | Europe, January and February 2026 Poland, January 2026 |
| March 2025 | 8728.6 µg/m³ | 329thof 2,862 | Europe, March 2025 Germany, Poland and 25 more countries, March 2025and 1 more |
| February 2026 | 8628.0 µg/m³ | 285thof 2,866 | Germany, Poland and Czechia, February 2026 Europe, January and February 2026 |
| December 2025 | 7924.0 µg/m³ | 384thof 3,006 | Eastern Europe, 16 to 21 December 2025 |
| March 2026 | 7823.7 µg/m³ | 476thof 2,971 | – |
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.
Łódź's worst days
| Day | US AQI | Episode |
|---|---|---|
| 20 Jan 2025 | 16169.7 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 10 Jan 2024 | 15560.8 µg/m³ | Europe, 8 to 27 January 2024 |
| 18 Feb 2026 | 15560.6 µg/m³ | Germany, Poland and Czechia, February 2026 |
| 22 Jan 2026 | 15560.5 µg/m³ | Europe, January and February 2026 |
| 20 Jan 2026 | 15257.5 µg/m³ | Europe, January and February 2026 |
| 6 Jan 2026 | 15256.8 µg/m³ | Poland, January 2026 |
| 26 Feb 2025 | 15256.7 µg/m³ | Europe, 14 February to 1 March 2025 |
| 13 Feb 2025 | 15256.5 µg/m³ | Europe, 1 to 14 February 2025 |
| 2 Mar 2023 | 15155.8 µg/m³ | Europe, 28 February to 4 March 2023 |
| 18 Feb 2025 | 15155.6 µg/m³ | Europe, 14 February to 1 March 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, Łódź, Poland, 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/pl/lodz/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.
Łódź 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).