水務署2020/21年年報 WSD Annual Report 2020/21

參數 Parameter 單位 Unit 監測結果 Monitoring Data 香港食水標準 HKDWS 達標 Compliance 最低值 Minimum 最高值 Maximum 平均值 Average 三氯乙酸鹽 Trichloroacetate 微克/公升 µg/L < 2 12 4.5 ≤ 200 √ 三氯乙烯 Trichloroethene 微克/公升 µg/L < 18 < 18 < 18 ≤ 20 √ 2,4,6- 三氯酚 2,4,6-Trichlorophenol 微克/公升 µg/L < 50 < 50 < 50 ≤ 200 √ 氟樂靈 Trifluralin 微克/公升 µg/L < 5.0 < 5.0 < 5.0 ≤ 20 √ 鈾 Uranium 毫克/公升 mg/L < 0.0002 0.001 < 0.0002 ≤ 0.03 √ 氯乙烯 Vinyl chloride 微克/公升 µg/L < 0.20 < 0.20 < 0.20 ≤ 0.3 √ 二甲苯 Xylenes 微克/公升 µg/L < 125 < 125 < 125 ≤ 500 √ 註釋： 以上的統計數字並不包括本署自二零一七年十二月起展開的 水質監測優化計劃（優化監測計劃）所收集的數據。該計劃 於全港隨機抽出客戶，從他們的水龍頭收集食水樣本，檢測 有可能在內部供水系統出現的六種金屬，即銻、鎘、鉻、 銅、鉛和鎳，以監測客戶水龍頭的食水水質。相關監測數 據的統計數字每周於本署優化監測計劃的網頁（ www.wsd. gov.hk/tc/dwsewqmp ）內公佈。 Notes: The above statistics do not include the data collected under the Enhanced Water Quality Monitoring Programme (“Enhanced Programme”) launched by the WSD since December 2017. The programme takes drinking water samples from consumer taps in the premises of consumers randomly selected over the territory for testing six metals, namely antimony, cadmium, chromium, copper, lead and nickel, which could be present in an internal plumbing system, to monitor the relevant drinking water quality at consumer taps. The statistics of the monitoring data of the Enhanced Programme are published on the WSD's website (www.wsd. gov.hk/en/dwsewqmp ) on a weekly basis. 數據一覽 Data Summary 112 水務署 二零二零至二一年年報