SmogRank / Hungary / Komárom-Esztergom / Esztergom
Esztergom, month by month
Esztergom has a measured daily mean on 1,079 days since 1 January 2023. Its worst month was January 2026, at 92 US AQI (31.2 µg/m³), 162nd of 2,617 cities on that month's world ranking. Its cleanest was May 2025, at 44 US AQI (7.9 µg/m³). 2025 averaged 59 US AQI (13.2 µg/m³), against 60 US AQI (14.1 µg/m³) in 2024.
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
13 months
| Month | Why |
|---|---|
| Jun 2026 | 16 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Jun 2025 | 18 of 30 days measured; a month needs 21. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Apr 2025 | 13 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | 14 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 15 of 31 days measured; a month needs 22. The others: 16 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 | 5 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
| Jan 2023 | 21 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 3 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.
Esztergom's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2026 | 9231.2 µg/m³ | 162ndof 2,617 | Europe, January and February 2026 Eastern Europe, January 2026 |
| February 2025 | 8326.1 µg/m³ | 264thof 2,633 | Europe, 1 to 14 February 2025 |
| December 2024 | 7722.9 µg/m³ | 179thof 2,616 | Europe, 24 December 2024 to 3 January 2025 |
| November 2024 | 7521.8 µg/m³ | 169thof 2,624 | Europe, November 2024 Eastern Europe, October and November 2024 |
| March 2026 | 7119.7 µg/m³ | 618thof 2,971 | – |
| December 2025 | 7019.3 µg/m³ | 542ndof 3,006 | Eastern Europe, 16 to 21 December 2025 |
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.
Esztergom's worst days
| Day | US AQI | Episode |
|---|---|---|
| 29 Dec 2024 | 17285.6 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 1 Apr 2024 | 15865.4 µg/m³ | Europe, March and April 2024 |
| 15 Jan 2026 | 15865.2 µg/m³ | Europe, January and February 2026 |
| 30 Dec 2024 | 14352.7 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 28 Dec 2024 | 13850.7 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 10 Jan 2026 | 13850.6 µg/m³ | Eastern Europe, January 2026 |
| 22 Jan 2026 | 12947.0 µg/m³ | Europe, January and February 2026 |
| 21 Jan 2026 | 12645.5 µg/m³ | Europe, January and February 2026 |
| 19 Jan 2026 | 12344.6 µg/m³ | Europe, January and February 2026 |
| 19 Dec 2025 | 12043.4 µg/m³ | Eastern Europe, 16 to 21 December 2025 |
Daily means, the highest since 1 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, Esztergom, Hungary, 1 Jan 2023 – 12 Oct 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/hu/esztergom/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.
Esztergom now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).