Mapping indoor and outdoor air Quality for the Jette Municipality

Jette Municipality Brussels

Jette, one of nineteen municipalities in the Brussels-Capital Region, launched its Climate & Air project at the start of 2020 with a straightforward ambition: actually understand what the air quality was like across the municipality, in the buildings residents use and in the neighbourhoods they live in. The challenge was that Jette had no governmental reference station of its own, meaning ambient air quality in most of the municipality was effectively invisible before this project. Airscan was brought in to change that - running a comprehensive assessment spanning indoor environments and nine outdoor locations, and turning the results into something the community could engage with.

The Brief

Jette municipality needed a dual-track air quality assessment: indoor monitoring across public buildings, libraries, schools, and kindergartens, and outdoor ambient monitoring across nine locations throughout the municipality, with results communicated to residents and local stakeholders in an accessible format.

What We Did

Airscan conducted indoor air quality measurements across commune buildings, libraries, schools, and kindergartens, covering particulate matter (PM2.5 and PM10), nitrogen dioxide, carbon dioxide, ozone, and volatile organic compounds – a parameter set broad enough to capture both pollutant risks and ventilation adequacy across very different types of occupied spaces. In parallel, outdoor air quality was monitored at nine locations distributed across the municipality, with results benchmarked against a reference station positioned in the municipality’s largest park. The findings were presented through a series of interactive workshops and public presentations designed to make the data meaningful to a general audience rather than just an administrative one.

How It Works

Measuring outdoor air quality at nine distributed points, rather than relying on a single centralised station, produces a spatial picture of how pollution levels vary across different parts of the municipality – by proximity to roads, industrial activity, green space, or building density. Comparing those readings against a park-based reference station gives a sense of the baseline the area could achieve. The indoor measurements across public buildings add a second layer: understanding not just what the ambient air quality is, but how it translates into the environments where residents, children, and public sector workers are spending their days.

Outcomes

The project gave Jette municipality its first detailed, localised picture of air quality conditions across both its built environment and its outdoor spaces – filling a gap that the absence of a governmental reference station had made impossible to address before. The results were shared with residents and stakeholders through interactive workshops and presentations, with a measurable positive impact on air quality awareness across the community.

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