SmogRank / Romania / Ilfov / Cernica
Cernica, month by month
Cernica has a measured daily mean on 282 days since 22 November 2025. Its worst month was January 2026, at 65 US AQI (16.7 µg/m³), 643rd of 2,617 cities on that month's world ranking. Its cleanest was September 2026, at 23 US AQI (4.1 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.
Cernica's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2026 | 6516.7 µg/m³ | 643rdof 2,617 | Europe, January and February 2026 |
| February 2026 | 6014.1 µg/m³ | 848thof 2,866 | Europe, January and February 2026 Romania, February 2026 |
| December 2025 | 5611.7 µg/m³ | 1,008thof 3,006 | Eastern Europe, 16 to 21 December 2025 |
| March 2026 | 5511.5 µg/m³ | 1,319thof 2,971 | Romania and Bulgaria, March 2026 Europe, 1 to 12 March 2026 |
| August 2026 | 386.9 µg/m³ | 2,142ndof 2,896 | – |
| April 2026 | 376.7 µg/m³ | 1,984thof 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.
Cernica's worst days
| Day | US AQI | Episode |
|---|---|---|
| 12 Feb 2026 | 10738.1 µg/m³ | Europe, January and February 2026 Romania, February 2026 |
| 20 Jan 2026 | 10537.1 µg/m³ | Europe, January and February 2026 |
| 19 Dec 2025 | 9331.7 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 5 Mar 2026 | 8728.3 µg/m³ | Europe, 1 to 12 March 2026 |
| 14 Jan 2026 | 8527.3 µg/m³ | Europe, January and February 2026 |
| 21 Jan 2026 | 8427.0 µg/m³ | Europe, January and February 2026 |
| 17 Mar 2026 | 8426.9 µg/m³ | Romania and Bulgaria, March 2026 |
| 4 Mar 2026 | 8426.8 µg/m³ | Europe, 1 to 12 March 2026 |
| 3 Feb 2026 | 8326.5 µg/m³ | Europe, January and February 2026 |
| 3 Jan 2026 | 8225.8 µg/m³ | – |
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, Cernica, 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/cernica/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.
Cernica now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 19:07 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).