is set forth in table b below table b______________________________________performance differences between present inventionand cf and epa test water 2 require present ments or inven characteristics goals tion chlorfloc______________________________________1 ph of post treated water 5 6 5 8 4 42 tablet disintegration 10 10 30 90 time in seconds3 4 minute supernatant clear clear very cloudy4 4 minute precipitate heavy heavy light 5 turbidity final ntu u2266 5 4 10 epa test water 2 6 bacterial log reduction u2267 6 log 11 log 6 log 7 giardia or latex cyst u2267 3 log 5 log 3 sup a log simulation reduction 8 viral polio rota u2267 4 log 4 log 1 2 log reduction______________________________________ epa requirements 1987 assessment guidelines sup a giardia cysts as can be seen from the above table b the tablet of the present invention meets or exceeds every goal criteria whereas cf meets some of the present epa standards typically tablets according to the invention will be packed in packages of synthetic plastic material preferably trilaminate packaging and then sealed under very low humidity conditions to keep them dry the amount of this composition to be added will be determined by estimating water temperature degree of solid contamination and intended use of the purified water generally water will be treated on a batch base system e g a bottle drum tank or reservoir water by adding an appropriate mass of tablets thereto to cause flocculation and if desired sterilization for consumption after clarification the water may be left for a sufficient time while treated to remove any objectional smell or taste e g residual excess chlorine removal or.