SmogRank / Bulgaria / Veliko Tarnovo / Svishtov

Svishtov, month by month

Svishtov has a measured daily mean on 166 days since 24 April 2026. Its worst month was May 2026, at 51 US AQI (9.2 µg/m³), 957th of 2,874 cities on that month's world ranking. Its cleanest was September 2026, at 24 US AQI (4.3 µg/m³).

Every month since 2026

2026too few days for a mean (a year needs 200)166 days measured

JanFebMarApr7 daysMay51#957 Jun24#2,245 Jul27#2,607 Aug28#2,731 Sep24#2,633 Oct41#1,179

Each square is a month's mean PM2.5 in US AQI from Svishtov'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 Svishtov 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	7 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.

Svishtov's worst months

Month	US AQI	Days measured	World rank
May 2026	519.2 µg/m³	28 of 31	957thof 2,874
August 2026	285.1 µg/m³	31 of 31	2,731stof 2,896
July 2026	274.9 µg/m³	30 of 31	2,607thof 2,784
June 2026	244.4 µg/m³	28 of 30	2,245thof 2,497
September 2026	244.3 µg/m³	30 of 30	2,633rdof 2,981

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.

Svishtov's worst days

Day	US AQI
4 May 2026	15155.9 µg/m³
30 Apr 2026	14854.6 µg/m³
29 Apr 2026	13549.5 µg/m³
28 Apr 2026	10537.0 µg/m³
5 May 2026	8125.3 µg/m³
7 May 2026	7421.6 µg/m³
10 May 2026	7119.7 µg/m³
8 May 2026	6013.9 µg/m³
6 May 2026	5913.6 µg/m³
25 Apr 2026	5813.0 µg/m³

Daily means, the highest since 24 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, Svishtov, Bulgaria, 24 Apr 2026 – 12 Oct 2026. Monitor data from senstate via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/bg/svishtov/history (accessed 12 Oct 2026).

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Svishtov 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).