Worst air pollution Kyustendil, today and tomorrow
Today (9 August): Air quality in Kyustendil is fair. PM2.5 and O3 are fair; AQI, NO2, and PM1 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 3:00 AM (NO2: 47.9/100).
Tomorrow (10 August 2026): Air quality in Kyustendil is fair. SO2 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 AM (NO2: 59.6/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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The dominant influence on Kyustendil's air quality is vehicle traffic and residential wood-burning trapped by the valley, layered onto a setting in an enclosed valley near the border with North Macedonia within Kyustendil. Ventilation here depends heavily on wind and rainfall, with the calmest, most stagnant periods generally producing the least favourable readings.
Today - 9 August | Pollution peaks at 03:00
AQI:
Medium
47.9/100
PM2.5 (fine particles):
Fair
36.5/100
PM10 (coarse particles):
Good
10.5/100
NO2 (nitrogen dioxide):
Medium
47.9/100
O3 (ozone):
Fair
37.7/100
SO2 (sulfur dioxide):
Good
16.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.8/100
PM1 (ultrafine particles):
Medium
41.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 06:00
AQI:
Medium
59.6/100
PM2.5 (fine particles):
Fair
23.5/100
PM10 (coarse particles):
Good
6.5/100
NO2 (nitrogen dioxide):
Medium
59.6/100
O3 (ozone):
Fair
36.8/100
SO2 (sulfur dioxide):
Fair
24.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.1/100
PM1 (ultrafine particles):
Fair
29.0/100
Pollen forecast in Kyustendil
View pollen forecastFrequently Asked Questions
Is air quality bad in Kyustendil right now?
On 9 August 2026, overall air quality in Kyustendil is fair. O3 is the main pollutant at 37.7/100. Pollution peaks around 3:00 AM (NO2: 47.9/100).
Will air quality be worse tomorrow in Kyustendil?
On 10 August 2026, air quality conditions in Kyustendil will be similar to today, with O3 forecast at fair at 36.8/100. Pollution peaks around 6:00 AM (NO2: 59.6/100).
When is air pollution at its worst in Kyustendil?
oak and pine pollen peaks and periods of vehicle traffic and residential wood-burning trapped by the valley are the two main triggers for reduced air quality in Kyustendil; most other times, the Kyustendil area sees comparatively steady, breathable conditions.
Are air quality levels in Kyustendil based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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