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Air Quality Index (AQI) in Bulgaria ๐Ÿ‡ง๐Ÿ‡ฌ

Sofia Air Quality Index

AQI INDEX
36
US EPA Standard

PM 2.5 Level
6
ยตg/mยณ

US EPA Index
1
Good

Live Air Quality Index (AQI) and PM2.5 Levels in Bulgaria

Currently, the Air Quality Index (AQI) in Sofia, the capital of Bulgaria, is measured at a score of 36. According to the US EPA health standard, this air quality rating is categorized as Good. The current atmosphere in Sofia is influenced by a PM2.5 (fine particulate matter) concentration of 6.4 ยตg/mยณ and PM10 levels recorded at 10.0 ยตg/mยณ. Monitoring of gaseous pollutants shows Nitrogen Dioxide (NO2) at 2.6 ยตg/mยณ.

Beyond the primary urban hubs, atmospheric conditions and smog levels fluctuate across Bulgaria based on industrial output, traffic density, and local weather patterns. Real-time pollution data and respiratory health alerts are also being actively monitored in cities like Plovdiv, Varna, Bourgas, Stara Zagora and Rusie. Tracking these air quality metrics is essential for residents nationwide to manage outdoor exposure and maintain respiratory safety during periods of increased particulate concentration.

Bulgaria Air Quality: Major Cities Index

Pollution Monitor & AQI Forecast: Bulgaria Regions

* Air Quality Index (AQI) data for Bulgaria is calculated using the US EPA standard. Information is processed from multiple monitoring stations detecting PM2.5, PM10, and gaseous pollutants to ensure accuracy for respiratory health planning.

Browse Air Quality in Bulgaria by cities in alphabetical order:

A B C D G H I K L M N P R S T V Y

Frequently Asked Questions about Air Quality in Bulgaria

What is the air quality in Bulgaria right now?

The current AQI in Sofia (capital of Bulgaria) is 36 โ€” categorised as Good. Conditions vary across the country โ€” see AQI for all cities for a complete picture.

Which city in Bulgaria has the worst air quality right now?

Right now, Shumen has the highest AQI reading in Bulgaria at 37 (Good).

Which city in Bulgaria has the best air quality right now?

Kyustendil currently has the lowest AQI in Bulgaria at 22 (Good).

What is the PM2.5 level in Sofia today?

The PM2.5 (fine particulate) concentration in Sofia, the capital of Bulgaria, is currently 6.4 ยตg/mยณ. The WHO 24-hour guideline is 15 ยตg/mยณ.

Is the air in Bulgaria safe to breathe today?

Most cities in Bulgaria currently report acceptable air-quality levels, though local conditions vary.

What are the cleanest cities in Bulgaria right now?

Top 5 cities in Bulgaria with the best (lowest) AQI right now:

  • Kyustendil: AQI 22 โ€” Good
  • Stara Zagora: AQI 23 โ€” Good
  • Sliven: AQI 23 โ€” Good
  • Kazanlak: AQI 23 โ€” Good
  • Karlovo: AQI 23 โ€” Good
What are the most polluted cities in Bulgaria right now?

Top 5 cities in Bulgaria with the worst (highest) AQI right now:

  • Shumen: AQI 37 โ€” Good
  • Sofia: AQI 36 โ€” Good
  • Targovishte: AQI 34 โ€” Good
  • Veliko Tลญrnovo: AQI 32 โ€” Good
  • Gorna Oryahovitsa: AQI 32 โ€” Good

Understanding Air Quality Levels

Good (0-50)

Air is fresh and healthy. Safe for all outdoor activities.

Moderate (51-100)

Acceptable air quality, though sensitive groups should monitor comfort.

Unhealthy (Sensitive) (101-150)

Vulnerable groups (children, elderly) should limit outdoor exertion.

Unhealthy (151-200)

Everyone begins to experience health effects. Stay indoors where possible.

Very Unhealthy (201-300)

Significant health impact for entire population. Emergency conditions.

Hazardous (301+)

Serious health alert: everyone may experience serious life-threatening effects.

Good (0-12)

Fine particles are at minimal, safe levels. Air is optimal.

Moderate (12-35)

Acceptable air, but haze may be present in urban areas.

Sensitive (35-55)

Individuals with heart or lung disease should limit activity.

Unhealthy (55-150)

Particulate levels high enough to cause respiratory irritation.

Very Unhealthy (150-250)

Heavy haze. High risk to cardiovascular health for the public.

Hazardous (250+)

Lethal particulate concentrations. Critical neurological and lung risk.

Good (0-54)

Low levels of dust and coarse particles. Environment is safe.

Moderate (55-154)

Coarse particles may trigger coughing in sensitive groups.

Sensitive (155-254)

Visible dust pollution. Sensitive groups should avoid heavy labor.

Unhealthy (255-354)

Widespread respiratory impacts likely for the population.

Very Unhealthy (355-424)

Dangerous dust and debris levels. Significant warnings issued.

Hazardous (425+)

Extremely high concentrations. Stay inside with filtration.

Good (0-54)

Surface ozone levels are within a safe, natural range.

Moderate (55-70)

Acceptable air, but sensitive individuals may feel chest tightness.

Sensitive (71-85)

Rising ozone can trigger airway inflammation in active children.

Unhealthy (86-105)

Avoid heavy outdoor work during the hottest part of the day.

Very Unhealthy (106-200)

Serious lung function reduction likely across the public.

Hazardous (201+)

Emergency ozone levels. Risk of permanent lung tissue damage.

Good (0-53)

Nitrogen levels are optimal. Safe for everyone.

Moderate (54-100)

Typical background levels for high-density urban areas.

Sensitive (101-360)

Increased risk of respiratory infections for vulnerable groups.

Unhealthy (361-649)

Significant airway inflammation likely near traffic zones.

Very Unhealthy (650-1249)

Acute respiratory distress potential. High-risk groups stay indoors.

Hazardous (1250+)

Toxic concentrations. Immediate health precautions required.

Good (0-4.4)

Carbon Monoxide levels are clean and non-toxic.

Moderate (4.5-9.4)

Acceptable; may affect those with specific heart conditions.

Sensitive (9.5-12.4)

Reduced oxygen delivery to the heart may occur.

Unhealthy (12.5-15.4)

Headaches and fatigue may occur in urban canyons.

Very Unhealthy (15.5-30.4)

Significant cardiovascular distress. Mental confusion possible.

Hazardous (30.5+)

Lethal potential. Immediate risk of neurological collapse.

Good (0-35)

Optimal air quality with no sulfur detection.

Moderate (36-75)

Acceptable air; minor odors possible near industry.

Sensitive (76-185)

Bronchoconstriction possible for active asthmatics.

Unhealthy (186-304)

Respiratory distress likely for the wider population.

Very Unhealthy (305-604)

Significant wheezing and shortness of breath likely.

Hazardous (605+)

Extreme respiratory danger. Significant life risk.