SmogRank / Bulgaria / Gabrovo / Sevlievo
Sevlievo, month by month
Sevlievo has a measured daily mean on 1,219 days since 1 January 2023. Its worst month was January 2025, at 95 US AQI (32.7 µg/m³), 74th of 2,474 cities on that month's world ranking. Its cleanest was June 2026, at 25 US AQI (4.5 µg/m³). 2025 averaged 57 US AQI (12.4 µg/m³), against 58 US AQI (12.6 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
5 months
| Month | Why |
|---|---|
| Oct 2025 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | 16 of 28 days measured; a month needs 20. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Dec 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 12 of 31 days measured; a month needs 22. The others: 19 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Sevlievo's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2025 | 9532.7 µg/m³ | 74thof 2,474 | Germany, France and 19 more countries, January 2025 Europe, 24 December 2024 to 3 January 2025 |
| January 2024 | 9130.4 µg/m³ | 112thof 2,385 | Europe, 8 to 27 January 2024 |
| January 2023 | 8426.8 µg/m³ | 81stof 1,261 | Eastern Europe, January 2023 |
| December 2024 | 7722.8 µg/m³ | 180thof 2,616 | Europe, 24 December 2024 to 3 January 2025 |
| January 2026 | 7622.6 µg/m³ | 317thof 2,617 | Europe, January and February 2026 |
| February 2024 | 7220.4 µg/m³ | 198thof 2,486 | – |
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.
Sevlievo's worst days
| Day | US AQI | Episode |
|---|---|---|
| 18 Jan 2024 | 16980.6 µg/m³ | Europe, 8 to 27 January 2024 |
| 25 Feb 2025 | 16372.0 µg/m³ | Europe, 14 February to 1 March 2025 |
| 6 Jan 2024 | 16271.1 µg/m³ | – |
| 28 Feb 2025 | 15561.4 µg/m³ | Europe, 14 February to 1 March 2025 |
| 15 Jan 2024 | 15561.3 µg/m³ | Europe, 8 to 27 January 2024 |
| 22 Jan 2025 | 15561.3 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 29 Dec 2024 | 15257.0 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 21 Jan 2025 | 14252.3 µg/m³ | Germany, France and 19 more countries, January 2025 |
| 16 Jan 2023 | 14252.2 µg/m³ | – |
| 9 Jan 2023 | 14252.0 µg/m³ | – |
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, Sevlievo, Bulgaria, 1 Jan 2023 – 12 Oct 2026. Monitor data from senstate via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/bg/sevlievo/history (accessed 13 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.
Sevlievo now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 02:07 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).