Softening through chemical precipitation is similar to removal of turbidity by coagulation, flocculation, and
sedimentation. There are many variations, but the typical process involves adding lime to raise the pH of
water until it is high enough for reactions to occur which prompt hardness compounds to settle out of the
water. The equipment used also resembles turbidity removal equipment - lime is added in the flash mixer,
the water is flocculated, and then the hardness compounds precipitate out in the sedimentation basin.