1. Bacteria- Who's been pooping in the water?
2. Parasites- roundworm ascaris, hookworm necator, whipworm trichuris, threadworm strongyloides, tapeworm hymenoleptis
3. Protozoa- giardia, entamoeba
4. Mercury- due to gold mining upriver, contaminating and harming our kids... think twice before you ask for gold for christmas, because looking pretty may not be worth the devastating environmental impact here. The difficulty is that mining brings a lot of business and jobs to our communities, and with out many would go out of business.
5. Lead- also affected by gold mining... is this why are kids have belly aches, anemia, and are not growing? or is it the parasites and malnutrition?