SmogRank / The Netherlands / Utrecht / Breukelen
Breukelen, month by month
Breukelen, Utrecht has a measured daily mean on 1,072 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 July 2025, at 17 US AQI (3.1 µg/m³). 2025 averaged 49 US AQI (8.9 µg/m³), against 55 US AQI (11.2 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 |
|---|---|
| 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 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Sep 2023 | 4 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Aug 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. |
| Jul 2023 | 6 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 24 with under 18 hours of readings or readings that failed our checks. |
| Jun 2023 | 17 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| May 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. |
| Mar 2023 | 12 of 31 days measured; a month needs 22. The others: 19 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Breukelen'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 Europe, 1 to 14 February 2025 |
| March 2025 | 6617.3 µg/m³ | 747thof 2,862 | Europe, March 2025 Germany, Poland and 25 more countries, March 2025and 1 more |
| January 2026 | 6416.2 µg/m³ | 687thof 2,617 | Europe, January and February 2026 |
| November 2024 | 6215.1 µg/m³ | 404thof 2,624 | Europe, November 2024 |
| January 2025 | 6215.1 µg/m³ | 483rdof 2,474 | Germany, France and 19 more countries, January 2025 Europe, January 2025and 1 more |
| January 2024 | 6214.8 µg/m³ | 475thof 2,385 | Europe, 8 to 27 January 2024 |
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.
Breukelen's worst days
| Day | US AQI | Episode |
|---|---|---|
| 25 Jan 2026 | 15155.5 µg/m³ | Europe, January and February 2026 |
| 10 Feb 2025 | 12947.0 µg/m³ | Europe, 1 to 14 February 2025 |
| 5 Mar 2025 | 12946.8 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 5 Feb 2026 | 12444.9 µg/m³ | Europe, January and February 2026 |
| 10 Mar 2025 | 12043.1 µg/m³ | Germany, Poland and 25 more countries, March 2025 |
| 20 Jan 2025 | 11641.5 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 9 Feb 2025 | 11641.5 µg/m³ | Europe, 1 to 14 February 2025 |
| 13 Feb 2025 | 11641.5 µg/m³ | Europe, 1 to 14 February 2025 |
| 3 Feb 2025 | 11039.3 µg/m³ | Europe, 1 to 14 February 2025 |
| 24 Jan 2026 | 10537.0 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, Breukelen, Utrecht, The Netherlands, 1 Jan 2023 – 11 Oct 2026. Monitor data from RIVM Luchtmeetnet and EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/nl/breukelen/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.
Breukelen 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).