SmogRank / Spain / Catalonia / Constantí
Constantí, month by month
Constantí has a measured daily mean on 493 days since 5 October 2023. Its worst month was August 2025, at 55 US AQI (11.4 µg/m³), 909th of 2,901 cities on that month's world ranking. Its cleanest was May 2024, at 32 US AQI (5.7 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
23 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. The others: 7 with no readings from the monitors, 3 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks. |
| Sep 2026 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jul 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2026 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Feb 2026 | No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 5 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 19 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | 18 of 28 days measured; a month needs 20. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Jan 2025 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 6 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 9 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 7 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks. |
| Feb 2024 | No day measured. The others: 1 missing from OpenAQ's archive, 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2024 | No day measured. The others: 31 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 | 4 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | 21 of 31 days measured; a month needs 22. The others: 6 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.
Constantí's worst months
| Month | US AQI | World rank |
|---|---|---|
| August 2025 | 5511.4 µg/m³ | 909thof 2,901 |
| November 2024 | 5310.3 µg/m³ | 790thof 2,624 |
| April 2025 | 519.3 µg/m³ | 1,386thof 2,951 |
| December 2025 | 519.3 µg/m³ | 1,517thof 3,006 |
| December 2024 | 519.2 µg/m³ | 1,021stof 2,616 |
| May 2025 | 478.4 µg/m³ | 1,227thof 2,826 |
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.
Constantí's worst days
| Day | US AQI | Episode |
|---|---|---|
| 14 Nov 2025 | 8929.7 µg/m³ | North-eastern Spain and Andorra, November 2025 |
| 17 Feb 2025 | 8326.4 µg/m³ | – |
| 25 Nov 2024 | 7823.8 µg/m³ | – |
| 19 Dec 2024 | 7622.7 µg/m³ | – |
| 16 Feb 2025 | 7522.2 µg/m³ | – |
| 7 Feb 2025 | 7220.4 µg/m³ | – |
| 13 Apr 2025 | 7119.6 µg/m³ | – |
| 14 Jun 2025 | 7019.4 µg/m³ | – |
| 27 Aug 2025 | 7019.2 µg/m³ | – |
| 19 Feb 2025 | 6818.3 µg/m³ | – |
Daily means, the highest since 5 Oct 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, Constantí, Spain, 5 Oct 2023 – 21 Jan 2026. Monitor data from EEA and Catalonia Medi Ambient I Sostenibilitat, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/es/constanti/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.
Constantí now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 18:07 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).