食水樣本 Drinking Water Samples 財政年度 Financial Year 食水樣本總數 No. of Drinking Water Samples 2017/18 82 389 2018/19 82 717 2019/20 81 221 2020/21 74 411 2021/22 76 499 註：以上的食水樣本是從濾水廠、配水庫、食水缸、供水接駁點及公眾可達的用戶水 龍頭抽取。 Note: The above drinking water samples were taken at water treatment works, service reservoirs, fresh water tanks, connection points and publicly accessible consumer taps. 確保東江水水質 根據現行的《東江供水協議》，廣東省當局致力維持輸港東江 水水質符合國家《地表水環境質量標準》（GB 3838-2002） 第II 類水的標準，此標準為適用作生活飲用水的地表水的最高 國家標準。為防止輸港東江水受到污染，當局更採取了一系列 措施和工程： • 於深圳水庫設立生物硝化站； • 興建東深專用輸水管道； • 進行河流污水分流工程和污染防治； • 設立東江流域水量水質監測和控制系統； 以及 • 完成沙灣河水環境綜合整治工程。 我們在接收東江水的木湖抽水站設置在線水質監測系統，對東 江水水質進行 24 小時監測。我們亦定期於木湖抽水站抽取樣 本作詳細分析，確保供應香港的東江水符合GB3838-2002 中 的第 II 類水的國家標準。 Maintaining Dongjiang Water Quality Under the current Dongjiang Water Supply Agreement, the Guangdong authorities ensure the quality of Dongjiang water delivered to Hong Kong meets the national standard for Type II water in the "Environmental Quality Standards for Surface Waters" (GB3838-2002), which is the highest national standard applicable to surface water abstracted for human consumption. A series of measures and projects have been adopted to prevent the contamination of Dongjiang water delivered to Hong Kong: • provision of a bio-nitrification plant at the Shenzhen Reservoir; • construction of dedicated aqueduct from Dongjiang to Shenzhen Reservoir; • undertaking of river sewage diversion works and pollution prevention; • implementation of the Dongjiang Basin Water Quantity and Quality Monitoring and Control System; and • completion of the comprehensive remediation project for the water environment of the Sha Wan River Basin . Through our online water quality monitoring system, we monitor the quality of Dongjiang water round the clock at the Muk Wu Raw Water Pumping Stations, where the Dongjiang water is received in Hong Kong and water samples are also collected regularly for detailed analysis to ensure that the Dongjiang water supplied to Hong Kong complies with the national standard for Type II water in the GB3838-2002. 財政年度 Financial Year GB3838-2002 第II類標準值 GB3838-2002 Type II Standard Value 單位 Unit 2019/20 2020/21 2021/22 氨氮 Ammoniacal Nitrogen 毫克/公升 mg/L 0.03 0.03 0.04 ≤0.5 錳 Manganese 毫克/公升 mg/L 0.03 0.02 0.03 ≤0.1 東江水的平均氨氮及錳水平 Average Ammoniacal Nitrogen and Manganese Levels in Dongjiang Water 現新 Innovate 水務署 二零二一至二二年年報 WSD Annual Report 2021/22 42
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