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Urban Air Quality Monitoring in Sofia

In 2019, Sofia deployed our Urban Air Quality Monitoring System at 22x key monitoring points around the city (including industrial locations, traffic hubs, and residential neighborhoods).

This enables the city authorities to track in real-time the air quality around the city, figure out pollution origins, detect polluters, and act.

Citizens are also able to track the air quality in the city via a freely accessible web platform. You too can check it out here!


The Challenge

  • Sofia is struggling with air pollution.
  • Existing government-owned stations but lack the density to detect local pollutants per district and provide actionable data.
  • Thus, city authorities do not have reliable data on taking active air quality improvement measures.


The Solution

  • Deployment of a city-wide network of 22x Urban Air Quality Monitoring Stations, tracking all main pollutants: PM10, PM2.5, NO2, O3, SO2, CO.
  • Platform, freely accessible to citizens where they can observe the data and the Air Quality Index.
  • Built-in alarms to detect local pollutants in real-time.


The Results

  • Real-time detection of local polluters. Now able to take legal actions.
  • Figuring out the “clean” and the “polluted” districts. Data-driven investment focus.
  • Figuring out the pollution origins and dispersion city-wide all year round.