1.  Chlorine is used to disinfect water.

2.  Chemicals were added to disinfect the water.

3.  Ancient Greeks and Romans used it to disinfect water and protect wounds.

4.  Bolivia managed to cut diarrhea among children by showing poor people how to disinfect water and then keep it at home in narrow-necked jugs with covers.

5.  Finally, the water is disinfected, usually with chlorine.

6.  Some industrial chlorine-based chemicals, used to bleach paper, disinfect water and make a variety of plastics, could be subjected to stricter regulation.

7.  The pool system is designed to circulate, filter and disinfect the water to improve its clarity and quality.

8.  The use of electron beams to disinfect water is also a promising technique.

9.  Though the water is disinfected, Health Ministry officials said sewer water from surrounding towns is piped into it.

10.  A radio and television campaign is also underway to inform people about the need to disinfect water.