SmogRank / Bulgaria / Veliko Tarnovo / Veliko Tŭrnovo

Veliko Tŭrnovo, month by month

Veliko Tŭrnovo has a measured daily mean on 172 days since 22 April 2026. Its worst month was August 2026, at 32 US AQI (5.7 µg/m³), 2,570th of 2,896 cities on that month's world ranking. Its cleanest was May 2026, at 22 US AQI (3.9 µg/m³).

Every month since 2026

2026too few days for a mean (a year needs 199)172 days measured

JanFebMarApr9 daysMay22#2,666 Jun24#2,245 Jul31#2,506 Aug32#2,570 Sep28#2,339 Oct38#1,426

Each square is a month's mean PM2.5 in US AQI from Veliko Tŭrnovo'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 Veliko Tŭrnovo marked; each year, the year's. A dashed square is the running month, so far.

Good0–50

Moderate51–100

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

1 month

Month	Why
Apr 2026	9 of 30 days measured; a month needs 21.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Veliko Tŭrnovo's worst months

Month	US AQI	Days measured	World rank
August 2026	325.7 µg/m³	31 of 31	2,570thof 2,896
July 2026	315.6 µg/m³	30 of 31	2,506thof 2,784
September 2026	285.0 µg/m³	30 of 30	2,339thof 2,981
June 2026	244.4 µg/m³	30 of 30	2,245thof 2,497
May 2026	223.9 µg/m³	31 of 31	2,666thof 2,874

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.

Veliko Tŭrnovo's worst days

Day	US AQI
12 Sept 2026	6617.0 µg/m³
16 Jul 2026	6516.4 µg/m³
14 Jul 2026	5511.3 µg/m³
15 Jul 2026	5410.9 µg/m³
8 Oct 2026	5310.3 µg/m³
19 Aug 2026	5310.0 µg/m³
17 Aug 2026	529.7 µg/m³
11 Sept 2026	529.5 µg/m³
26 Jun 2026	519.3 µg/m³
17 Jul 2026	509.0 µg/m³

Daily means, the highest since 22 Apr 2026; 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, Veliko Tŭrnovo, Bulgaria, 22 Apr 2026 – 11 Oct 2026. Monitor data from AirGradient and senstate via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/bg/veliko-turnovo/history (accessed 12 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.

Veliko Tŭrnovo 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).