Company does not report M3 on water metrics, only references responsible water management P.14:

"Our contribution to the World Business Council for Sustainable Development gathered momentum during 2015, with Arcadis actively leading on Zero Emission Cities, responsible water use and on natural capital. With this council, we also spent time at the COP 21 climate meeting in Paris this year, to provide further support. In 2015, we also joined the World Economic Forum, another business community in which we can infuse our thinking on improving quality of life. Our continued support for UN Global Compact, the world’s largest corporate sustainability initiative, also aligns with this approach and we performed eight missions in support of the UN-Habitat Shelter program."