SmogRank / Romania / Ilfov / Otopeni
Otopeni, month by month
Otopeni has a measured daily mean on 283 days since 22 November 2025. Its worst month was January 2026, at 84 US AQI (26.7 µg/m³), 215th of 2,617 cities on that month's world ranking. Its cleanest was September 2026, at 44 US AQI (8.0 µg/m³).
Every month since 2025
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
1 month
| Month | Why |
|---|---|
| Nov 2025 | 5 of 30 days measured; a month needs 21. The others: 4 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.
Otopeni's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2026 | 8426.7 µg/m³ | 215thof 2,617 | Europe, January and February 2026 |
| February 2026 | 7320.9 µg/m³ | 521stof 2,866 | Europe, January and February 2026 Romania, February 2026 |
| December 2025 | 7119.9 µg/m³ | 507thof 3,006 | Eastern Europe, 16 to 21 December 2025 Southern Europe, December 2025 |
| March 2026 | 6918.7 µg/m³ | 645thof 2,971 | Romania and Bulgaria, March 2026 Europe, 1 to 12 March 2026 |
| August 2026 | 5310.2 µg/m³ | 849thof 2,896 | – |
| April 2026 | 529.6 µg/m³ | 1,033rdof 2,941 | – |
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.
Otopeni's worst days
| Day | US AQI | Episode |
|---|---|---|
| 20 Jan 2026 | 15662.3 µg/m³ | Europe, January and February 2026 |
| 14 Jan 2026 | 15257.4 µg/m³ | Europe, January and February 2026 |
| 21 Jan 2026 | 15256.3 µg/m³ | Europe, January and February 2026 |
| 12 Feb 2026 | 14151.6 µg/m³ | Europe, January and February 2026 Romania, February 2026 |
| 15 Jan 2026 | 13950.8 µg/m³ | Europe, January and February 2026 |
| 19 Dec 2025 | 13850.5 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 5 Mar 2026 | 12244.0 µg/m³ | Europe, 1 to 12 March 2026 |
| 13 Jan 2026 | 11239.9 µg/m³ | Europe, January and February 2026 |
| 4 Mar 2026 | 11039.0 µg/m³ | Europe, 1 to 12 March 2026 |
| 11 Dec 2025 | 10838.2 µg/m³ | Southern Europe, December 2025 |
Daily means, the highest since 22 Nov 2025; 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, Otopeni, Romania, 22 Nov 2025 – 10 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ro/otopeni/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.
Otopeni 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).