The Kenyan government, in partnership with the Danish Embassy, is employing high-tech helicopter-based electromagnetic sensors to map the groundwater aquifers beneath Nairobi and its surrounding metropolitan area.

• This initiative, part of the Sh200 million GROWANA project, aims to identify and artificially replenish depleted aquifers to address the city's significant long-term water supply deficit.
• Key organizations involved include the Ministry of Water and Sanitation, the Regional Centre on Ground Water Resources, and the Athi Water Works Development Agency.
• The aerial mapping technology can probe depths of at least 350 meters and is crucial for informing strategies to prevent water rationing and potential land subsidence due to groundwater depletion.