SmogRank / Romania / Ilfov / Popeşti-Leordeni

Popeşti-Leordeni, month by month

Popeşti-Leordeni has a measured daily mean on 345 days since 11 January 2023. Its worst month was January 2026, at 82 US AQI (26.0 µg/m³), 227th of 2,617 cities on that month's world ranking. Its cleanest was May 2026, at 52 US AQI (9.4 µg/m³).

Every month since 2023

202661 so far254 days measured601st of 2,798 in the world
Jan82#227Feb74#503Mar68#670Apr53#917May52#908Jun54#601Jul54#1,211Aug56#599Sep52#699Oct8 days
2025too few days for a mean (a year needs 256)34 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNov5 daysDec69#558
2024too few days for a mean (a year needs 257)1 day measured
JannoneFeb1 dayMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2023too few days for a mean (a year needs 256)56 days measured
Jan7 daysFeb81#50Mar20 daysApr3 daysMaynoneJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Popeşti-Leordeni's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Popeşti-Leordeni marked; each year, the year's.
Good0–50
Moderate51–100
Unhealthy for sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

35 months
MonthWhy
Oct 20268 of 12 days measured; a month needs 9. The others: 1 with no readings from the monitors, 3 with readings for part of the day (a day needs 18 hours).
Nov 20255 of 30 days measured; a month needs 21. The others: 25 with under 18 hours of readings or readings that failed our checks.
Oct 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 2025No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2025No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 20241 of 29 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 20233 of 30 days measured; a month needs 21. The others: 27 with under 18 hours of readings or readings that failed our checks.
Mar 202320 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jan 20237 of 31 days measured; a month needs 22. The others: 14 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.

Popeşti-Leordeni's worst months

MonthUS AQIDays measuredWorld rankEpisode
January 2026 8226.0 µg/m³29 of 31227thof 2,617Europe, January and February 2026
February 2023 8125.1 µg/m³25 of 2850thof 1,129Europe, 6 to 25 February 2023
February 2026 7421.3 µg/m³27 of 28503rdof 2,866Europe, January and February 2026
Romania, February 2026
December 2025 6919.0 µg/m³29 of 31558thof 3,006Eastern Europe, 16 to 21 December 2025
March 2026 6818.1 µg/m³28 of 31670thof 2,971Romania and Bulgaria, March 2026
Europe, 1 to 12 March 2026
August 2026 5611.7 µg/m³26 of 31599thof 2,896–

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.

Popeşti-Leordeni's worst days

DayUS AQIEpisode
12 Feb 2023 15460.0 µg/m³Europe, 6 to 25 February 2023
20 Jan 2026 15358.0 µg/m³Europe, January and February 2026
17 Feb 2023 15156.1 µg/m³Europe, 6 to 25 February 2023
15 Jan 2026 14452.9 µg/m³Europe, January and February 2026
21 Jan 2026 13549.2 µg/m³Europe, January and February 2026
14 Jan 2026 13448.9 µg/m³Europe, January and February 2026
19 Dec 2025 13147.8 µg/m³Eastern Europe, 16 to 21 December 2025
12 Feb 2026 12444.8 µg/m³Europe, January and February 2026
Romania, February 2026
1 Feb 2024 12344.3 µg/m³Europe, 27 January to 2 February 2024
25 Feb 2023 12244.0 µg/m³Europe, 6 to 25 February 2023

Daily means, the highest since 11 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, Popeşti-Leordeni, Romania, 11 Jan 2023 – 10 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/ro/popesti-leordeni/history (accessed 13 Oct 2026).

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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.

Popeşti-Leordeni now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-13 04:07 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).