HYDRO4 will upgrade an existing rainwater harvesting system of domestic residences located in a village of Mykonos to reclaim potable water after slow sand filtration and recharge water into the aquifer, mitigating the long-encountered problem of saline water intrusion. The water will be used to cultivate 0.2 ha lavender. Lavender was chosen to produce high added value essential oil. Nutrients will be provided through composting of greens available on-site. Part of the water distribution channels will be built with locally available stones.