Ecological Engineering: Filtering Gardens Against Cholera

In Port-au-Prince, greywater management is critical to preventing the spread of cholera. Green Engineering: Instead of expensive treatment plants, MAGA built dragonfly zones (Phyto-purification).

• Operation: Wastewater flows through gravel basins planted with reeds (Typha). Bacteria attached to the plant roots degrade organic matter.
• Performance: 95% reduction in pollutant load at the outlet, making the water safe for discharge into the natural environment without health risks.