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      • Low dissolved oxygen can be harmful to most aquatic life, whereas high 5-day biochemical oxygen demand and ammonia nitrogen levels indicate the presence of organic pollution and sewage contamination. In recent years, the majority of rivers in Hong Kong have been designated as "Good" to "Excellent".
      www.gov.hk/en/residents/environment/water/water/riverwater.htm
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  2. Water pollution impacts are obvious. Bacteria, excessive nutrients, toxic chemicals and other pollutants can make swimmers sick, contaminate or kill marine life, and give off malodor. Like other major cities in the world, Hong Kong has devoted considerable efforts to improve our water quality.

  3. The 2022 Annual Report on Drinking Water Quality in Hong Kong. Development Bureau Drinking Water Safety Unit June 2023. Content. Foreword ..................................................................................................... 1. Hong Kong Drinking Water Standards ....................................................... 3.

  4. 2023年1月17日 · River pollution in Hong Kong represents a huge threat to biodiversity and ecosystems. While water pollution levels are improving, the quality of some watercourses located in rural areas remains low. Examining heavily polluted rivers can help assess the

  5. In summary, the state of water quality of Hong Kong’s watercourses remained good and steady in 2020 and generally maintained a long-term improvement trend as a result of the gradual reduction of pollution loading to the rivers and streams.

  6. In 2021, WSD made over 28 300 sampling visits to different locations to take drinking water samples and conducted over 267 300 chemical, physical, bacteriological, biological, radiological, trace organics and trace inorganics tests as shown in Table 1 below.

  7. Water pollution used to be a severe environmental problem in Hong Kong before the 1990s, as most of the sewage was directly discharged into the seas or rivers without treatment. Indicative of poor water quality, marine water in the Victoria Harbour Water 60%

  8. The potential for pollution in Hong Kong's rivers and streams is a significant threat, given the large concentrations of population around the many waterways. Here you can learn more about the state of our rivers and the Government's work in ensuring the highest environmental standard are met.