Tribal people in India in extreme poverty use unimproved drinking water sources such as surface water and unprotected wells. These water sources become highly turbid during late summer and rainy season. Because of drinking turbid and untreated water, epidemics of water born diseases are of common occurrence in these populations. People drink polluted water because they lack knowledge of proper drinking water treatments and also they cannot afford costly chemical coagulants. Therefore, usage of safe, traditional water treatment agents from natural sources has become essential. Sanskrit writings dating from several centuries BC make reference to seeds of tree Strychnos potatorum L. as clarifying. Hence in present paper the water clearing efficacy of this plant is reported. Results of turbid untreated water samples treated with seed powder of this plant are given.