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 List four (4) processes used for surface water or groundwater resource in drinking water treatment: 

 Drinking water softening is to remove _  _from water, mostly the _ _ ions. 

 _ _ _ _ and _ _ _ _ controls the solids’ settling-velocity in a water or wastewater settling/sedimentation process in a clarifier. 

 Treated municipal wastewater is seldom disinfected. True or False 

 Advanced municipal wastewater treatment includes removal of BOD, total suspended solids (TSS), total nitrogen (TN), and total phosphorus (TP) to the stringent water quality levels required to maintain the good of watershed(s).  True or False