SmogRank / France / Auvergne-Rhône-Alpes / Bellegarde-sur-Valserine
Bellegarde-sur-Valserine, month by month
Bellegarde-sur-Valserine has a measured daily mean on 857 days since 17 January 2023. Its worst month was February 2025, at 72 US AQI (20.3 µg/m³), 548th of 2,633 cities on that month's world ranking. Its cleanest was September 2026, at 21 US AQI (3.7 µg/m³).
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
24 months
| Month | Why |
|---|---|
| Jun 2026 | 18 of 30 days measured; a month needs 21. The others: 7 with no readings from the monitor, 5 with readings for part of the day (a day needs 18 hours). |
| Jan 2026 | 19 of 31 days measured; a month needs 22. The others: 12 with readings for part of the day (a day needs 18 hours). |
| Oct 2025 | 16 of 31 days measured; a month needs 22. The others: 15 with readings for part of the day (a day needs 18 hours). |
| Sep 2025 | 17 of 30 days measured; a month needs 21. The others: 13 with readings for part of the day (a day needs 18 hours). |
| Aug 2025 | 12 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 18 with readings for part of the day (a day needs 18 hours). |
| Jul 2025 | 19 of 31 days measured; a month needs 22. The others: 3 with no readings from the monitor, 9 with readings for part of the day (a day needs 18 hours). |
| Jun 2025 | 9 of 30 days measured; a month needs 21. The others: 5 with no readings from the monitor, 16 with readings for part of the day (a day needs 18 hours). |
| May 2025 | 14 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 16 with readings for part of the day (a day needs 18 hours). |
| Apr 2025 | 6 of 30 days measured; a month needs 21. The others: 5 with no readings from the monitor, 14 with readings for part of the day (a day needs 18 hours), 5 with readings left out by our checks. |
| Mar 2025 | 12 of 31 days measured; a month needs 22. The others: 7 with no readings from the monitor, 12 with readings for part of the day (a day needs 18 hours). |
| Jan 2025 | 19 of 31 days measured; a month needs 22. The others: 12 with readings for part of the day (a day needs 18 hours). |
| Dec 2024 | 20 of 31 days measured; a month needs 22. The others: 11 with readings for part of the day (a day needs 18 hours). |
| Oct 2024 | 13 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 17 with readings for part of the day (a day needs 18 hours). |
| Sep 2024 | No day measured. The others: 1 with no readings from the monitor, 29 with readings for part of the day (a day needs 18 hours). |
| Aug 2024 | 13 of 31 days measured; a month needs 22. The others: 2 with no readings from the monitor, 16 with readings for part of the day (a day needs 18 hours). |
| Jul 2024 | 5 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 16 with readings for part of the day (a day needs 18 hours). |
| Jun 2024 | 2 of 30 days measured; a month needs 21. The others: 1 with no readings from the monitor, 27 with readings for part of the day (a day needs 18 hours). |
| May 2024 | No day measured. The others: 31 with readings for part of the day (a day needs 18 hours). |
| Apr 2024 | 2 of 30 days measured; a month needs 21. The others: 28 with readings for part of the day (a day needs 18 hours). |
| Mar 2024 | 10 of 31 days measured; a month needs 22. The others: 10 with no readings from the monitor, 11 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: 6 with no readings from the monitor, 2 with readings for part of the day (a day needs 18 hours), 3 missing from OpenAQ's archive. |
| Mar 2023 | 10 of 31 days measured; a month needs 22. The others: 1 with no readings from the monitor, 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
| Jan 2023 | 14 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Bellegarde-sur-Valserine's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| February 2025 | 7220.3 µg/m³ | 548thof 2,633 | Europe, 14 February to 1 March 2025 Europe, 1 to 14 February 2025 |
| December 2025 | 5712.5 µg/m³ | 914thof 3,006 | – |
| March 2026 | 519.1 µg/m³ | 1,860thof 2,971 | – |
| June 2023 | 468.2 µg/m³ | 1,076thof 1,603 | – |
| January 2024 | 448.0 µg/m³ | 1,234thof 2,385 | – |
| October 2023 | 417.4 µg/m³ | 974thof 2,012 | – |
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.
Bellegarde-sur-Valserine's worst days
| Day | US AQI | Episode |
|---|---|---|
| 19 Feb 2025 | 10938.7 µg/m³ | Europe, 14 February to 1 March 2025 |
| 17 Feb 2025 | 10336.4 µg/m³ | Europe, 14 February to 1 March 2025 |
| 18 Feb 2025 | 10035.4 µg/m³ | Europe, 14 February to 1 March 2025 |
| 20 Feb 2025 | 9532.5 µg/m³ | Europe, 14 February to 1 March 2025 |
| 2 Oct 2023 | 9231.0 µg/m³ | – |
| 7 Feb 2025 | 9231.0 µg/m³ | Europe, 1 to 14 February 2025 |
| 20 Jan 2025 | 9230.9 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 18 Jan 2025 | 9029.9 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 6 Feb 2025 | 8527.2 µg/m³ | Europe, 1 to 14 February 2025 |
| 8 Feb 2025 | 8426.9 µg/m³ | Europe, 1 to 14 February 2025 |
Daily means, the highest since 17 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, Bellegarde-sur-Valserine, France, 17 Jan 2023 – 11 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/fr/bellegarde-sur-valserine/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.
Bellegarde-sur-Valserine 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).