Unless removed, water hyacinths release nutrient pollutants back into the water when they die. Massive outbreaks cause further economic harm by blocking water transportation.
Maliban kung inalis, water hyacinths pakawalan nakapagpalusog pollutants pabalik sa tubig kapag namatay sila. Massive paglaganap maging sanhi ng karagdagang pinsala ekonomiya sa pamamagitan ng pagharang ng tubig transportasyon.