Because northern Taiwan has abundant rainfall, it was not until 12 years after the reservoir was filled, during the series of islandwide droughts from 1991 onwards, that Greater Taipei made real use of water from the Feitsui Reservoir.
由於北部雨水豐富，因此水庫蓄水十二年，大台北幾乎到民國八十年後全省幾次大旱，才真正利用到翡翠水庫的水源。