Science and advanced-tech at the service of evidence-based policies

Designing the Future of Healthy, Pollution-Free Cities

When science and purpose
come together

Working for better urban environments

HARMONIE is a European project that helps cities design better policies for cleaner air, less noise, and healthier communities.

It improves how pollution is monitored, modelled, and forecast, and develops advanced tools to understand how different actions affect public health — especially for vulnerable groups such as children, the elderly, and people with respiratory conditions. These tools also assess the long-term economic and social sustainability of policies, supporting informed, evidence-based decisions.

Two environments, one vision

Impactful data for impactful results

Pilots
Real-world data

Based on real-world studies in five diverse European cities  we gather detailed environmental, behavioural, and health data. This includes indoor and outdoor pollution, citizen mobility, and exposure, with special focus on vulnerable populations.

Digital Twin
Real-world based data

Our Citizen-Centric Digital Twin (CCDT) and Lung Digital Twin (LDT) are advanced simulation platforms that model how air and noise pollution affect people in real urban contexts. Together, they allow cities to test policy scenarios and estimate their health impacts before implementation.

Real world data

Pollution, mobility and behaviour data from 5 pilot cities

Digital Twins

Lung Digital Twin

Simulates pollutant transport and deposition in the airways to assess health impact

Citizen Centric Digital Twin

Visualises pollution hotspots and models social dynamics to understand exposure and health impact

Evidence-based decision making

Provides policy makers with insights to make decisions that protect public health

By combining real-world insights from our pilot cities with advanced modelling from our Digital Twins, we create a continuous feedback loop between reality and simulation. Data gathered in the field — on air quality, noise, mobility, and health — feeds into the digital sphere, where scenarios can be tested, refined, and evaluated before implementation. In turn, results from these simulations guide targeted interventions on the ground, ensuring that every recommendation is both evidence-based and adapted to the unique needs of each city.

Our experts

A collaborative network working for healthier cities

Work Package Leaders

Beatriz Eguzkitza
Project coordinator | Barcelona Supercomputing Center (BSC)
Ioar Rivas
WP1 | Institute of Environmental Assessment and Water Research (IDAEA-CSIC)
Francisco Ramírez
WP2 | BETTAIR
Oihane Gómez
WP3 | University of Deusto
Thomas Berkemeier
WP4 | Max Plank Insitute for Chemistry
Alberto Castro
WP5 | Swiss TPH
Pietro Podestà
WP6 | Factual
María Paz Baghetti
WP7 | Barcelona Supercomputing Center (BSC)
Rosana Cortés
WP7 | Barcelona Supercomputing Center (BSC)
Laia Bonjoch
WP8 | Barcelona Supercomputing Center (BSC)

Scientific Advisory Board

Elena Codina
Jordi Sunyé
Lidia Moraswka