What if the air you breathe on your street is very different from the air measured a few hundred metres away?
- EarthSense
- 3 days ago
- 3 min read
Air pollution is rarely uniform. A busy road, school gate, residential street or green space can all experience very different levels of pollution despite being part of the same community.
Yet when we talk about air quality, we often rely on data from a limited number of monitoring locations to represent much larger areas. While these monitoring stations providevital insights, they can only tell us what is happening where they are installed. The reality is that air pollution is constantly changing, influenced by traffic, weather, topography, buildings and local activity.
For Clean Air Day, this raises an important question: how can we improve air quality if we don’t fully understand where pollution is occurring and who is being exposed?
Understanding air pollution has never been more important. Poor air quality remains one of the biggest environmental risks to public health, contributing to a range of respiratory and cardiovascular conditions. Across the UK and around the world, organisations are working to reduce emissions, improve public health and create healthier places to live, work and learn.
But meaningful action relies on meaningful evidence.
In recent years, there has been a significant increase in the availability of small form air quality sensors. These technologies have helped raise awareness of air pollution and made monitoring more accessible than ever before. However, simply collecting more data does not automatically lead to better understanding.
Air quality monitoring is a complex science. Sensor performance can be affected by environmental conditions, calibration requirements and long-term stability. While somesensors can play an important role in expanding coverage, the quality and accuracy of the information they provide can vary considerably. For organisations making decisions about public health, infrastructure, transport or environmental policy, confidence in the data is essential.
At the same time, even the most accurate sensor can only provide information about the specific location where it is installed. No organisation can realistically place a sensor on every street, outside every school, at every workplace or along every route that people travel each day.
This is one of the biggest challenges in air quality management: understanding what is happening between the monitors.
As a result, important pollution hotspots can remain hidden. Areas where people may experience higher levels of exposure can easily be missed when monitoring data is only available from a limited number of locations. Without a fuller picture, opportunities to target interventions and protect communities can be overlooked.
At EarthSense, we believe that understanding air quality requires more than measurements alone. It requires a complete picture.
That is why EarthSense developed Virtual Zephyr®, combining our advanced air quality modelling capabilities with, meteorological intelligence and machine learning techniques to estimate air pollution levels at virtually any location.
Virtual Zephyr® provides air quality insights beyond the monitor, helping organisations understand pollution not just where it is measured, but where people experience it.
Rather than relying solely on physical hardware, Virtual Zephyr® helps fill the gaps between monitoring sites, providing insight into how pollution behaves across entire towns, citiesand communities. Through the MyAir® platform, users can access modelled concentrations of key pollutants such as nitrogen dioxide (NO₂) and particulate matter (PM₂.₅), alongside the environmental factors that influence air quality throughout the day.
The value of this approach is not simply that it provides more information. It provides context.
By extending coverage beyond monitored locations, Virtual Zephyr® helps reveal pollution patterns that may otherwise go unnoticed. It enables organisations to identify pollution hotspots, understand local exposure risks and assess the effectiveness of interventions with greater confidence. Whether supporting local authorities, schools, healthcare providers or businesses, it helps turn complex environmental data into actionable insight.
Most importantly, it helps bring air quality information closer to the places that matter most to people.
Because air pollution is ultimately a human issue. It affects the route a child takes to school, the walk someone takes to work, the air people breathe in their neighbourhoods and the health of communities across our towns and cities.
On Clean Air Day, it is worth remembering that cleaner air starts with better understanding.
The message is simple: you can’t improve what you can’t see.
Monitoring remains a critical part of that journey, but the future lies in combining trusted measurements with intelligent modelling to create a fuller picture of the environments we live in.
After all, the air people breathe is not defined by the location of a monitor.
It is defined by the places where they live, work, learn and travel every day.
And the more clearly we can see those places, the better equipped we are to create cleaner, healthier communities for everyone.
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