José Hernández has two plastic barrels in his front yard, filled to the brim with water collected during the recent rains. Half a dozen buckets, a trash can and a cooking pot sit close by, nearly overflowing. It should be enough for Hernández to tend to his garden for the next few weeks  and slight relief for a water bill that sets him back $130 to $170 each month. A retired farmworker, Hernández, 64, supports his wife and two daughters primarily on a $950 monthly Social Security check.