SmogRank / Bulgaria / Sofia / Botevgrad
Botevgrad, month by month
Botevgrad has a measured daily mean on 993 days since 1 January 2023. Its worst month was January 2025, at 102 US AQI (35.8 µg/m³), 63rd of 2,474 cities on that month's world ranking. Its cleanest was September 2026, at 29 US AQI (5.3 µg/m³). 2025 averaged 61 US AQI (14.3 µg/m³), against 61 US AQI (14.6 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
13 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. The others: 6 with no readings from the monitors, 4 with readings for part of the day (a day needs 18 hours), 2 with under 18 hours of readings or readings that failed our checks. |
| Jul 2026 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2026 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Feb 2026 | No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Dec 2025 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2025 | 3 of 30 days measured; a month needs 21. The others: 27 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. |
| 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.
Botevgrad's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| January 2025 | 10235.8 µg/m³ | 63rdof 2,474 | Germany, France and 19 more countries, January 2025 Europe, 24 December 2024 to 3 January 2025 |
| January 2023 | 9331.7 µg/m³ | 59thof 1,261 | Eastern Europe, January 2023 |
| December 2023 | 8527.2 µg/m³ | 78thof 2,247 | South-eastern Europe, 28 December 2023 to 1 January 2024 Eastern Europe, December 2023 |
| December 2024 | 8326.3 µg/m³ | 134thof 2,616 | Europe, 24 December 2024 to 3 January 2025 |
| February 2024 | 7823.6 µg/m³ | 153rdof 2,486 | Europe, 27 January to 2 February 2024 |
| January 2024 | 7723.1 µg/m³ | 210thof 2,385 | Europe, 27 January to 2 February 2024 Europe, 8 to 27 January 2024and 1 more |
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.
Botevgrad's worst days
| Day | US AQI | Episode |
|---|---|---|
| 1 Jan 2025 | 185103.9 µg/m³ | Europe, 24 December 2024 to 3 January 2025 |
| 28 Feb 2025 | 182100.4 µg/m³ | Europe, 14 February to 1 March 2025 |
| 25 Feb 2025 | 17995.5 µg/m³ | Europe, 14 February to 1 March 2025 |
| 24 Feb 2025 | 17690.9 µg/m³ | Europe, 14 February to 1 March 2025 |
| 4 Jan 2023 | 17184.2 µg/m³ | Eastern Europe, January 2023 |
| 24 Jan 2024 | 16372.8 µg/m³ | Europe, 8 to 27 January 2024 |
| 1 Jan 2023 | 16271.6 µg/m³ | Eastern Europe, January 2023 |
| 19 Dec 2023 | 16271.3 µg/m³ | Eastern Europe, December 2023 |
| 2 Jan 2023 | 16067.9 µg/m³ | Eastern Europe, January 2023 |
| 14 Feb 2023 | 15966.6 µg/m³ | Europe, 6 to 25 February 2023 |
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, Botevgrad, Bulgaria, 1 Jan 2023 – 24 Sep 2026. Monitor data from senstate via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/bg/botevgrad/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.
Botevgrad 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).