Project background

The City of Łódź, in collaboration with Airly and Veolia, decided to conduct mobile air quality monitoring using Airly’s Orbital mobile sensor. The goal was to obtain precise data on particulate and gas pollution across the entire city. A key objective was to identify so-called “hotspots” – locations most vulnerable to exceeding air quality standards, especially where stationary air quality monitoring was previously unavailable.

Study overview

• Duration: 57 days (November 2024 – January 2025)
• Devices: 2 Airly Orbital mobile sensors mounted on Veolia and MPK vehicles
• Coverage: 4,250 km travelled across various parts of Łódź
• Data recording: every 10 seconds, with 41 active measurement days
• Final analysis based on: Orbital mobile sensor data, 54 stationary Airly sensors in Łódź, and 3 GIOŚ reference stations

Results and insights

• 72% time coverage – data collected for every hour of the day and every day of the week
• 44 days exceeded WHO limits for PM2.5; 42 days exceeded NO₂ limits
• 5 most polluted locations in the city identified (CAQI > 83)
• Mapping of high pollution areas outside the range of current stationary sensors and GIOŚ reference stations
• Detailed analysis of schools, kindergartens, and hospitals – CAQI > 75 maps created for “sensitive” facilities where vulnerable individuals are most at risk from poor air quality

Impact for the city

Thanks to mobile smog monitoring with Orbital sensor, the city gained a comprehensive picture of air pollution, including in previously unmonitored or hard-to-reach areas.

This enabled:

• Accurate recommendations for new stationary sensor locations.
• Preparation for educational and regulatory initiatives.
• Identification of public institutions (schools, hospitals) that require continuous monitoring and protection of vulnerable populations from the harmful effects of poor air quality.

What’s next?

The city of Łódź can now:

• Install stationary sensors in critical locations.
• Launch education campaigns using localized data.
• Support municipal services using hotspot data.
• Deepen data analysis around sources like power plants or residential neighborhoods.

Airly Orbital is the ideal solution for cities that want to plan actions based on data – not assumptions.

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