RainBank helps kampung communities replace part of their daily non-drinking water demand with harvested rainwater — reducing pressure on groundwater, one hub at a time.
Limited piped water access
Household groundwater pumping
Aquifer pressure drops
Land subsidence accelerates
Flood risk increases
RainBank reduces demand at the source
RainBank Jakarta is a Social Business concept based on Muhammad Yunus' principles. It reduces groundwater extraction by harvesting rainwater for non-potable household use: showers, washing, toilet flushing, cleaning, and community facilities. Drinking water remains sourced through existing safe channels.
Jakarta's land subsidence is strongly linked to groundwater pumping. RainBank offsets selected daily uses with harvested rainwater, reducing demand where it begins.
Collection is anchored to trusted buildings such as mosques and schools. Storage, distribution, and maintenance are handled locally by a trained operator.
Setup capital funds the first hub. Small access fees and service agreements cover operations, operator income, maintenance, and eventual capital recovery.
of Jakarta residents lack access to clean piped water
Source: World Bank, 2024
per year — how fast North Jakarta is sinking
Source: MDPI Water Journal, 2024
more expensive — vendor water vs. piped water price
Source: The Conversation, 2023
Why Jakarta's water problem is really a groundwater dependency problem — and what it means for the city's future.
Read more
From rooftop to community tap. The RainBank Hub explained as a practical, low-tech local infrastructure system.
See the system
How one hub can reduce groundwater demand, improve access for non-potable uses, and support local operator income.
See the data
Our Mission
The first pilot is designed to test what a hub can reliably offset: washing, cleaning, toilet flushing, showers, and mosque or school use during rainy and high-availability periods.
Discuss a pilot hub