SmogRank / Romania / Mureș County / Târgu Mureş
Târgu Mureş, month by month
Târgu Mureş has a measured daily mean on 335 days since 8 November 2025. Its worst month was January 2026, at 181 US AQI (97.7 µg/m³), 11th of 2,617 cities on that month's world ranking. Its cleanest was July 2026, at 52 US AQI (9.8 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
Târgu Mureş's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2026 | 18197.7 µg/m³ | 11thof 2,617 | Europe, January and February 2026 |
| December 2025 | 14051.4 µg/m³ | 195thof 3,006 | Eastern Europe, 16 to 21 December 2025 Southern Europe, December 2025 |
| March 2026 | 12244.0 µg/m³ | 120thof 2,971 | Europe, 1 to 12 March 2026 |
| February 2026 | 11943.0 µg/m³ | 140thof 2,866 | Europe, January and February 2026 |
| November 2025 | 11842.5 µg/m³ | 201stof 2,715 | – |
| April 2026 | 7421.6 µg/m³ | 373rdof 2,941 | Eastern Europe, 15 to 17 April 2026 |
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.
Târgu Mureş's worst days
| Day | US AQI | Episode |
|---|---|---|
| 22 Jan 2026 | 330240.0 µg/m³ | Europe, January and February 2026 |
| 21 Jan 2026 | 310230.0 µg/m³ | Europe, January and February 2026 |
| 20 Jan 2026 | 265190.0 µg/m³ | Europe, January and February 2026 |
| 18 Jan 2026 | 248173.0 µg/m³ | Europe, January and February 2026 |
| 24 Jan 2026 | 240165.0 µg/m³ | Europe, January and February 2026 |
| 23 Jan 2026 | 234159.0 µg/m³ | Europe, January and February 2026 |
| 19 Jan 2026 | 233158.0 µg/m³ | Europe, January and February 2026 |
| 25 Jan 2026 | 212137.0 µg/m³ | Europe, January and February 2026 |
| 18 Dec 2025 | 205130.0 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
| 17 Dec 2025 | 193116.0 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
Daily means, the highest since 8 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, Târgu Mureş, Romania, 8 Nov 2025 – 11 Oct 2026. Monitor data from AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/ro/targu-mures/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.
Târgu Mureş 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).