It's a very small amount, something like a drop per gallon and you don't drink it right away, you wait something like an hour before drinking. Water from your tap has been treated with chlorine - same thing as in bleach.
So John Roberts thinks FEMA didn't preposition anything for Katrina? He said because of elections FEMA did it in 2004 and now it is overkill for Rita.
I think John Roberts of CBS is Stuck on Stupid!!
According to some survival websites, add 1/2 tsp bleach to 5 gallons of water.
1 teaspoon per 10 gallons of water and wait at least 30 minutes before drinking.