Frontrunner Cases

CitiObs will implement its work in a total of 85 cases of COs in three phases: 5 Frontrunners, 30 Alliances and 50 Fellow Cases

Frontrunner cases are existing CO's in 5 cities and they will work in close collaboration with the project from the start. They will participate in the co-design of the CitiObs approach by providing inputs based on their own experience, implement the first versions of CitiObs methods and tools and help to fine-tune them. The co-created knowledge, tools and methods will be packaged in the CitiObs Knowledge Platform and made easily accessible via the CitiObs Cookbook.


City of Athens is part of the region of Attica in Greece. It is a city that is already having moderate Air Quality and is facing extreme heat waves but also flood risks. Furthermore, the noise pollution is evident all around. As a city, it has already been part of other Citizen Science projects (i.e. SCENT, CompAIR etc) and is one of the Frontrunner cases for CitiObs project.

  • 📌 Participation in numerous Citizen Science (CS) projects​
  • 📌 Various Citizen Observatories (COs) already established​
  • 📌 Selected as one of the “100 Climate-Neutral and Smart Cities by "2030”​
  • 📌 A Climate Mitigation and Adaptation plan and a Resilience Strategy for 2030 are envisioned​


Overlooking the Mediterranean Sea, and famous for Gaudí and other Art Nouveau architecture, Barcelona is one of Europe's trendiest cities in culture, fashion and cuisine. It combines the creativity of its artists and designers with respect and care for local traditions.

  • 📌 Active and involved in many fronts, with citizens striving for the environment and a strong drive towards a better city for all it's inhabitants.
  • 📌 Committed City Council for the environment, with a dedicated Citizen Science Office and part of the C40 cities with various projects supporting them in tackling the city's own socio-environmental challenges.


Traffic is at the core of a variety of societal problems ranging from road safety, air, noise, and light pollution, to public health risks, to the liveability of our communities. However, obtaining objective traffic counts and localised data about air pollution can be difficult, because local authorities usually only have the resources to monitor a limited number of roads. University College Dublin is organising the CitiObs project in Dublin and will empower local communities with sensors and skills to monitor traffic and air pollution in their neighbourhoods and with tools to analyse traffic data.

  • 📌 Selected as one of the “100 Climate-Neutral and Smart Cities by 2030"
  • 📌 One of the cities in the world with the highest commuting time and lowest commuting speed


Rotterdam is the second largest city and municipality in the Netherlands. Rotterdam is Europe's largest seaport and a major logistic and economic centre. Rotterdam is diverse, with the demographics differing by neighbourhood. In 2022, it had a population of 655,468 and is home to over 180 nationalities

  • 📌 Committed City Council for the environment,
  • 📌 Active citizen communities, with more than 500 citizens monitoring air quality using low-cost sensors.


Situated in the south of Norway by the sea, Kristiansand is the sixth largest municipality by population in the country. The city is an attractive industrial hub with more people moving there every year. The municipality place great emphasis on sustainability and inclusiveness with initiatives such as ‘A City for Everyone’, where all the citizens can participate.

  • 📌 Experience in the field: the city is involved in two Citizen Science projects; NordicPATH and Urbanity.
  • 📌 Goal of making Kristiansand a socially just low-emission society with 80% lower greenhouse gas emissions in 2030.
  • 📌 Kristiansand signed the European mission “Adaptation to climate change”. The agreement is a declaration of intent to invest in research and innovation in the transition to a society where the climate is already changing.
  • 📌 Kristiansand won the Norwegian national award for Attractive City in 2018. The award focuses on new development and sustainability.

Alliance cases

The Alliance cases will be COs of selected urban geographical areas with specific environmental interest.  They will onboard in June 2024 and through a mutual learning process, will apply and further enhance the CitiObs approaches and tools.  Following guidance from the first version of the CitiObs Cookbook on the Knowledge Platform and via peer learning with the Frontrunners the Alliance COs will help to fine-tune the CitiObs tools, approaches and guidance for the second version of the Cookbook.

Fellow cases

The Fellow cases are the COs that need reassurance that “it works”. They will onboard in June 2025 and will have the opportunity to learn and advance based on the CitiObs guidance and tools available in the CitiObs Knowledge Platform and from following the implementation process and the obtained results in Frontrunner and Alliance Cases.