Real-Time Air Quality Monitoring from the Thames to City Streets


Air pollution in urban areas does not respect boundaries.


In Southwark, emissions from river transport move beyond the Thames, dispersing into surrounding streets, residential neighbourhoods, and public spaces. Yet vessel-related emissions are often less monitored than road traffic.


To address this gap, Persium deployed a real-time Southwark air quality monitoring network spanning the river and the borough’s streets, delivering a connected view of transport-related exposure.


Air pollution in urban areas does not respect boundaries.


In Southwark, emissions from river transport move beyond the Thames, dispersing into surrounding streets, residential neighbourhoods, and public spaces. Yet vessel-related emissions are often less monitored than road traffic.


To address this gap, Persium deployed a real-time Southwark air quality monitoring network spanning the river and the borough’s streets, delivering a connected view of transport-related exposure.


Air pollution in urban areas does not respect boundaries.


In Southwark, emissions from river transport move beyond the Thames, dispersing into surrounding streets, residential neighbourhoods, and public spaces. Yet vessel-related emissions are often less monitored than road traffic.


To address this gap, Persium deployed a real-time Southwark air quality monitoring network spanning the river and the borough’s streets, delivering a connected view of transport-related exposure.

Monitoring Exposure Along the Thames


Monitoring Exposure Along the Thames


Monitoring Exposure Along the Thames


The River Thames is a vital transport corridor supporting mobility, tourism, and commerce. But vessel activity contributes to localised emissions that interact with surrounding urban environments.


Understanding how boat traffic affects nearby communities requires more than periodic sampling. It requires continuous, hyperlocal monitoring.


Persium Pods are positioned along the Thames to measure:

  • PM1, PM2.5, PM10

  • Key gases including NO₂, O₃, CO, SO₂

  • Noise levels

  • Atmospheric conditions such as wind, temperature, humidity, and pressure


This allows for detailed analysis of how emissions behave in real time, not just at a single static location.

The River Thames is a vital transport corridor supporting mobility, tourism, and commerce. But vessel activity contributes to localised emissions that interact with surrounding urban environments.


Understanding how boat traffic affects nearby communities requires more than periodic sampling. It requires continuous, hyperlocal monitoring.


Persium Pods are positioned along the Thames to measure:

  • PM1, PM2.5, PM10

  • Key gases including NO₂, O₃, CO, SO₂

  • Noise levels

  • Atmospheric conditions such as wind, temperature, humidity, and pressure


This allows for detailed analysis of how emissions behave in real time, not just at a single static location.

The River Thames is a vital transport corridor supporting mobility, tourism, and commerce. But vessel activity contributes to localised emissions that interact with surrounding urban environments.


Understanding how boat traffic affects nearby communities requires more than periodic sampling. It requires continuous, hyperlocal monitoring.


Persium Pods are positioned along the Thames to measure:

  • PM1, PM2.5, PM10

  • Key gases including NO₂, O₃, CO, SO₂

  • Noise levels

  • Atmospheric conditions such as wind, temperature, humidity, and pressure


This allows for detailed analysis of how emissions behave in real time, not just at a single static location.

From River to Street-Level Intelligence


Air pollution from vessels does not remain confined to the water.


To capture how emissions disperse, Persium extended monitoring beyond the riverfront and into surrounding streets and residential areas across Southwark.


This integrated network provides:

  • Borough-wide exposure mapping

  • Street-level resolution of pollutant concentrations

  • Comparison between vessel-related and road-related emissions

  • Continuous tracking of peak pollution periods


By connecting river and street monitoring, the deployment delivers a system-level understanding of urban exposure.

Integrating Transport Data with Environmental Monitoring


All collected data streams into Persium MapView, a live digital platform that integrates:

  • Air quality monitoring

  • Localised wind and atmospheric data

  • Vessel movement information


This fusion enables source attribution, helping identify how and when vessel activity contributes to pollution peaks in surrounding areas.


Environmental data becomes dynamic, spatial, and actionable, not static or isolated.


From River to Street-Level Intelligence


Air pollution from vessels does not remain confined to the water.


To capture how emissions disperse, Persium extended monitoring beyond the riverfront and into surrounding streets and residential areas across Southwark.


This integrated network provides:

  • Borough-wide exposure mapping

  • Street-level resolution of pollutant concentrations

  • Comparison between vessel-related and road-related emissions

  • Continuous tracking of peak pollution periods


By connecting river and street monitoring, the deployment delivers a system-level understanding of urban exposure.

Integrating Transport Data with Environmental Monitoring


All collected data streams into Persium MapView, a live digital platform that integrates:

  • Air quality monitoring

  • Localised wind and atmospheric data

  • Vessel movement information


This fusion enables source attribution, helping identify how and when vessel activity contributes to pollution peaks in surrounding areas.


Environmental data becomes dynamic, spatial, and actionable, not static or isolated.


From River to Street-Level Intelligence


Air pollution from vessels does not remain confined to the water.


To capture how emissions disperse, Persium extended monitoring beyond the riverfront and into surrounding streets and residential areas across Southwark.


This integrated network provides:

  • Borough-wide exposure mapping

  • Street-level resolution of pollutant concentrations

  • Comparison between vessel-related and road-related emissions

  • Continuous tracking of peak pollution periods


By connecting river and street monitoring, the deployment delivers a system-level understanding of urban exposure.

Integrating Transport Data with Environmental Monitoring


All collected data streams into Persium MapView, a live digital platform that integrates:

  • Air quality monitoring

  • Localised wind and atmospheric data

  • Vessel movement information


This fusion enables source attribution, helping identify how and when vessel activity contributes to pollution peaks in surrounding areas.


Environmental data becomes dynamic, spatial, and actionable, not static or isolated.




From Monitoring to Targeted Intervention


Real-time Southwark air quality monitoring supports evidence-based policy and operational improvements, including:


  • Accelerating electric boat adoption

  • Optimising vessel schedules to reduce peak emissions

  • Informing stricter emission standards

  • Supporting greener fuel incentives


By quantifying exposure patterns, stakeholders can model the impact of specific interventions before implementing them.


The Bigger Picture:


Southwark demonstrates a broader principle:


Urban air quality cannot be managed in silos. River transport, road traffic, atmospheric conditions, and community exposure are interconnected.


When monitoring networks reflect that complexity, policymakers gain the clarity needed to protect public health and design cleaner transport systems.


From the Thames to surrounding streets, Persium transforms invisible emissions into measurable intelligence, in real time.



From Monitoring to Targeted Intervention


Real-time Southwark air quality monitoring supports evidence-based policy and operational improvements, including:


  • Accelerating electric boat adoption

  • Optimising vessel schedules to reduce peak emissions

  • Informing stricter emission standards

  • Supporting greener fuel incentives


By quantifying exposure patterns, stakeholders can model the impact of specific interventions before implementing them.


The Bigger Picture:


Southwark demonstrates a broader principle:


Urban air quality cannot be managed in silos. River transport, road traffic, atmospheric conditions, and community exposure are interconnected.


When monitoring networks reflect that complexity, policymakers gain the clarity needed to protect public health and design cleaner transport systems.


From the Thames to surrounding streets, Persium transforms invisible emissions into measurable intelligence, in real time.



From Monitoring to Targeted Intervention


Real-time Southwark air quality monitoring supports evidence-based policy and operational improvements, including:


  • Accelerating electric boat adoption

  • Optimising vessel schedules to reduce peak emissions

  • Informing stricter emission standards

  • Supporting greener fuel incentives


By quantifying exposure patterns, stakeholders can model the impact of specific interventions before implementing them.


The Bigger Picture:


Southwark demonstrates a broader principle:


Urban air quality cannot be managed in silos. River transport, road traffic, atmospheric conditions, and community exposure are interconnected.


When monitoring networks reflect that complexity, policymakers gain the clarity needed to protect public health and design cleaner transport systems.


From the Thames to surrounding streets, Persium transforms invisible emissions into measurable intelligence, in real time.