After Typhoon Herb, although the surface of the Feitsui Reservoir was clear, the water discharged through the outlets below the surface was no less turbid the water in the Shihmen Reservoir, and downstream waterworks had to use extra chemicals to clean it up.
賀伯颱風過後，翡翠水庫湖面雖清澈，但位在湖面下層的放水口所排出的水，濁度卻不輸給石門水庫，下游淨水廠得多加藥水淨化水質。