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Mendoza, Argentina

Using AI to Tackle Unregulated Landfills

Project Type:
Community Engagement, Finance, Health and Wellbeing, Infrastructure, Public Safety, Transportation

2025 Gold Certification

A notable example of Mendoza’s use of data is the Youth Climate Action Fund, through which the City empowers young people to design and implement data-driven climate solutions. Funded by Bloomberg Philanthropies and supported by city staff, participants collect and analyze climate data, measure environmental impact and publicly communicate results. Projects have included optimizing bike lanes, evaluating the environmental benefits of plazas and planning shelters for extreme heat.

“Achieving Bloomberg Philanthropies What Works Cities Gold Certification demonstrates that our city not only collects data, but uses it to improve safety, sustainability, and quality of life. Cities today face complex challenges, and this Certification confirms that we address them using the best tools available: data, innovation, and collaboration.”

Mayor Ulpiano Leandro Suarez

2024 Silver Certification

Used an AI-powered digital tool to identify small but harmful garbage dumps scattered around the city.

Created a Directorate of Digital Transformation, Smart Cities and Open Government to take advantage of data and make better decisions.

Built dashboards for data on commercial activity and entrepreneurship, waste recycling, public safety, and more after seeing the power of collating data during the pandemic.

Making progress toward 2030 climate goals through innovations from the Municipal Climate Change Committee, which is made up of the Secretary of Environment and Urban Development, science and technical organizations, universities, the Institute of Environmental Sciences, and more.

Like many cities, Mendoza has a problem with illegal dumping, particularly in marginalized neighborhoods near the foothills of the Andes. These small piles of trash pose major risks to water quality and public health. However, they are not always easy to see: many of the spill sites are small and hidden in ravines.

City leaders are now using artificial intelligence to locate and clean these micro-landfills. In collaboration with the Bunge and Born Foundation, Mendoza developed an algorithm that used drone photography to detect landfills as small as one square meter. The initiative is part of a broader effort to use data to make smart decisions related to climate change and the environment.

In just one part of the city, the tool found 1,573 detected trash tags. The algorithm can also identify whether the material in these piles is plastic, branches, construction debris, or something else. This gives city leaders a plan to direct their cleanup efforts, impacting and improving quality of life. of 2,000 families in 19 neighborhoods.

Recognizing the global need for such a tool, the team behind the technology has released the code and it has presented to cities throughout Argentina. And to make it replicable, they have adapted the algorithm so that it can use free images from Google Earth, instead of drone photography, which can be expensive. They believe the same approach could be used to detect other environmental hazards on the urban periphery, such as deforestation.

“Managing open dumps is an enormous management challenge for national, provincial and local governments,” said the Secretary of Environment from Mendoza, Sebastián Fermani. “Not only because of pollution and climate change issues, but also because it is a problem that disproportionately affects the vulnerable population.”

“Local governments may not have the resources of a regional or provincial government, but through data-driven decisions, we can generate a better climate and investment to create jobs and economic development.”

Mayor Ulpiano Leandro Suarez
Comparison of detection of small dumpsites by AI versus humans.

Used AI to identify and classify 1,573 small dumpsites in just one section of the city.

“What Works Cities Certification is both a recognition of the work done by a great team here, and also shows us how we can improve city management based on international standards.”

Mayor Ulpiano Leandro Suarez

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Luján de Cuyo, Argentina

 

Project Type:
Community Engagement, Environment, Health and Wellbeing, Infrastructure, Public Safety, Technology, Transportation

2025 Gold Certification

9,000 water meters installed across Luján de Cuyo to support the municipality’s data-driven water management strategy

35% reduction in household water waste since the municipality implemented its comprehensive water management policy

50% reduction in traffic collisions between 2015 and 2025 due to an improved public-space monitoring network integrating new license plate-reading video cameras and real-time data

The municipality saves $116 million Argentine pesos (about $80,000 USD) annually through its solar park, which reduces municipal energy costs by up to 60%.

Water is precious in Luján de Cuyo. In recent years, leaders of the municipality of about 175,000, located in the semi-arid foothills of the Andes in western Argentina, have grappled with multiple trends straining Luján de Cuyo’s water supply. The municipality’s population has been growing rapidly. The Mendoza River, which runs through the municipality, delivering crucial seasonal meltwater from the mountains, is projected to provide 50% less water by 2050 due to climate change. Furthermore, aging infrastructure in the municipality’s water distribution system has caused nearly 40% of the municipality’s water supply to be lost annually to leaks. 

The municipality’s solution? Safeguard its water supply by implementing a comprehensive strategy to measure water consumption, identify distribution issues and engage residents. Mindful that what can be measured can be managed, the municipality installed more than 9,000 water meters to track the usage of residential, industrial and commercial connections; this encompasses about 25% of all customers. Installations were prioritized based on consumption indicators. More affluent neighborhoods where residents have gardens with non-native plants and use significantly more water were identified as top intervention areas, for example.

A key goal of the water management strategy is to ensure that each user pays for what they consume, promoting more conscious use of the resource. To raise awareness of consumption habits and encourage conservation, the municipality launched an AI-powered chatbot in 2024. Through the “Lugi” chatbot, residents can monitor their water use in real-time, receive notifications about high consumption levels that may indicate leaks, and view projected water use over billing periods. Lugi also provides goal-setting functions to help households conserve water. The results have been significant. Since implementing its water management strategy, the municipality has recorded a 35% reduction in household water waste. 

At the same time, improved meters at water treatment plants enable officials to more accurately measure the drinking water supply entering the distribution system. The combination of measurements on both the supply and demand sides of the system allows for the precise detection of where, when and why losses occur. Data powers action: The municipality can identify leaks quickly, adjust flow according to the needs of each area and plan infrastructure investments based on evidence, rather than assumptions.

As Luján de Cuyo’s water supply faces increased strain, data is at the core of problem-solving, helping the municipality understand, manage and conserve water so that every drop goes further. 

“In a context of scarce resources and growing challenges, governments cannot rely on intuition. In Luján de Cuyo, data has become the foundation for every major policy — from water and energy to mobility and public space management. Achieving Gold Certification reflects not only our progress, but our long-term commitment to governing with evidence and delivering real results for our community.”

Mayor Esteban Allasino

2023 Silver Certification

Relocated more than 1200 families who lived in flood-prone areas.

Created a workforce development initiative that employed residents, renovated public land and expanded access to recycling centers.

Improved access to territorial data, which made getting land permit data faster—going from months of waiting to just three clicks. The platform, Luján 3D, allows renovations and housing development to have substantial improvements.

Improved accessibility for residents with disabilities through an adapted bicycle program.

In 2016, a survey conducted by the city of Luján de Cuyo, Argentina, revealed a heartbreaking reality. There were about 3,500 families who lived in marginal or informal neighborhoods, of which 700 were concentrated in the Bajo Luján area, often without basic services. The most vulnerable residents lived near a flood-prone river, underscoring the urgency for change. As a result, the City developed an ambitious urbanization and relocation project, supported by the World Bank.

At the heart of the initiative was a resident-driven approach. Residents were surveyed to identify and prioritize needs, including proximity to employment, family size, and level of need to minimize disruption to their daily lives. Efforts to monitor the impact of this relocation were key. A survey and audit process was initiated, capturing residents’ experiences before, during and after the move. This data was visualized through PowerBI dashboards, allowing real-time tracking of project progress.

“Governing is making decisions. Doing it well requires exceptional use of data. If we intend to achieve real impact in the community, our public policies must be data-driven. We dream of becoming an international example of well-managed local government.”

Mayor Esteban Allasino

The result was the construction of 700 homes in 11 neighborhoods.

This enormous initiative not only provided new homes, but restored a sense of human dignity and trust in government for those who had long been marginalized.

Seven hundred safe and practical homes is a significant achievement.

Additionally, the community intervened and regularized other settlements benefiting 500 families, completing a very ambitious stage that managed to reach more than 35% of the most vulnerable sector of the City.

But the government did not stop there. City leaders knew that housing is only one part of poverty. Thus, in an effort to create employment opportunities, the city turned its attention to residents who worked at the landfills as urban recyclers.

These families made a living collecting recyclable materials from garbage dumps. To help them, the following public policies were promoted: Closure and remediation of garbage dumps, Social inclusion of urban reclaimers, Inclusive Recycling Program – Centro Verde. In this way, the city, together with a group of neighbors, mainly women, officially formed a cooperative. The City provided land and necessary infrastructure.

The Fortress of My Earth, which now has nearly 30 members, launched a program that uses geographic information system (GIS) data to strategically place recycling bins throughout the city. This project successfully increased the number of Green Dots from 8 to 65, ensuring that residents could easily find a container within 500 meters of their homes. This caused a notable increase in recycling from 2021 to 2023.

The story doesn’t end there. In 2021, the City cut the ribbon on Luján Park,  located in the previously abandoned housing settlement Bajo Luján. The area has been transformed into a lively community space, with children’s play areas with equipment made from recycled plastic from the cooperative.

The Bajo Luján and Centro Verde projects reveal how intertwined initiatives can have an exponential impact on residents’ lives. They boosted citywide sustainability, helping hundreds of Luján de Cuyo residents achieve housing stability and financial independence and building much-needed trust in local government.

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