Parasites in drinking water threaten health through diarrhea, abdominal pain, and nutrient loss. Nuisance worms such as Giardia and helminths can enter poorly treated supplies, especially in rural or flood-affected areas. Boiling water for one minute, filtering with a certified device, and treating with safe chemicals reduce risk. Protect households by using protected sources, avoiding untreated surface water, and practicing good hygiene. Regular monitoring of water quality and prompt medical care for persistent symptoms are essential. When treatment is needed, consult local health authorities. For access to guidance and supplies, nizonide distributors can help ensure safe, labeled products and dosing.