Universal Registration Document 2024

4 SUSTAINABILITY REPORT ENVIRONMENTAL MATTERS

4.2.2.2 Controlling our water discharges E2-1 – Groupe ADP policy for managing and mitigating water pollution Airports discharge water through rainwater networks or wastewater networks. This water can become polluted during incidents involving the handling of hydrocarbons (aircraft fuel, for example) or when weather conditions at a hub so require. For airports subject to winters that include periods of frost/snow, it is necessary to ensure flight safety and therefore ensure there is no ice/frost on aircraft and runways/taxiways. The airports concerned use de-icing/anti icing products. These products, which are applied to aircraft and waterproofed ground, can then end up in whole or in part in rainwater networks, which then have to be cleaned up before being discharged into the natural environment. For this reason, Groupe ADP airports have been committed to environmental quality for many years, regardless of their geographical location (see [E2-1-15-(c)] → Information indicating whether and how the policy addresses avoiding incidents and emergency situations, and if and when they occur, controlling and limiting their impact on people and the environment). Groupe ADP has rainwater treatment systems at its Paris Orly and Paris-Charles de Gaulle hubs, as well as at many foreign airports, which, in addition to pollution retention and isolation basins, meet the regulatory requirements for discharge into the natural environment imposed by local regulations specific to each airport. See [E2-3-AR 18] → Information on the targets set at site level (pollution). These impose thresholds, measurement methods, measurement and reporting frequencies, measurement points to be complied with, etc., in order to ensure that discharges from the airports in question do not have a negative impact on the natural environment. See [E2-3-AR 18] → Information on the targets set at site level (pollution). Groupe ADP's policy for managing the negative impacts of airport water discharges includes the regulatory elements mentioned above, but also goes further and explores new subjects: u Deployment of a water savings plan that coherently addresses the issues of the quality of water discharged and the availability of water in the natural environment (reduction and restoration), see [E2-1-15-(a)] → Disclosure of whether and how the policy addresses mitigating negative impacts related to pollution of air, water and soil. u Better protection of natural environments by linking pollution matters to the preservation of biodiversity, since pollution is the second leading cause of biodiversity loss, ahead of climate change, according to the IPBES, see [E4-2-22] → Policies to manage material impacts, risks and opportunities related to biodiversity and ecosystems [see ESRS 2 – MDR-P]. This information is communicated continuously to local residents through a dedicated platform in Paris (see the entrevoisins website) and to the authorities on an annual basis in other regions. Paris-Charles de Gaulle hosts the annual Water Law Committee, bringing together the prefectural authorities (the water police in particular), local authorities (municipalities, departments, water network

operators, etc.) local residents' associations, and the relevant departments of Aéroports de Paris SA. These committees provide an opportunity for an open exchange to collect and answer questions on the basis of scientific studies carried out by Aéroports de Paris SA, its tenants and the authorities. In order to guarantee the ongoing effectiveness of this policy, its constituent elements are regularly audited by external bodies as part of the maintenance of the certifications of the airports concerned ([E2-1-15-(c)] → Information indicating whether and how the policy addresses avoiding incidents and emergency situations, and if and when they occur, controlling and limiting their impact on people and the environment) and ongoing work is carried out with the authorities to adapt the rules to changes in the sensitivity of the environment and/or changes in the activities carried out at the Group's airports (see [E2-3-22] → [E2] Tracking effectiveness of policies and actions through targets [see ESRS 2 MDR-T]). [E2-1-15-(a)] → Disclosure of whether and how the policy addresses mitigating negative impacts related to pollution of air, water and soil Mitigating the negative impacts of water pollution is ADP's primary concern in terms of its water policy. The first step is strict compliance with the regulations applicable to ADP in France and internationally (see [E2-3 AR 18] → Information on the targets set at site level (pollution)). To complement its obligations, Groupe ADP adopted a long term savings plan in 2023 addressing the issue of water quality (see [E2-1-15-(c)] → Information indicating whether and how the policy addresses avoiding incidents and emergency situations, and if and when they occur, controlling and limiting their impact on people and the environment). For its Paris airports, it brings together voluntary actions taken in addition to and consistent with its regulatory obligations. As part of its environmental policy, Groupe ADP is exploring new ways of reducing its impact on the environment. In addition to water quality, the issue of soil sealing, inherent in airport infrastructures, has also arisen. As a result, since 2022, the Group has been studying and implementing a policy of reducing the impact of its newly-built infrastructure in Paris by managing rainwater at its sites as far as possible, in particular through direct infiltration. The aim of this policy, which is being rolled out in France, is to reduce the risk of flooding downstream of operated sites, and also to improve groundwater recharge by making new infrastructure 'permeable'. This will be made possible in the city by controlled and indirect site-by-site systems (known as "plot" management). On the airside, the water collected may be contaminated with products used for anti-icing and de-icing runways and aircraft (biodegradable products – potassium formate, glycols – but requiring treatment before discharge due to their concentration at certain times of the year). As a result, waterproofing of the built site is essential in order to collect the water. Limiting waterproofing is therefore indirect and will consist of compensating for new waterproofed surfaces in suitable areas after water treatment.

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AÉROPORTS DE PARIS w UNIVERSAL REGISTRATION DOCUMENT 2024