In the case of Hong Kong, there were reportedly many cases of heavy exposure to these toxic metals amongst the public through means of water, food, air, etc. In 2017
, lead and toxic heavy metals were found in water at a public estate in Shau Kei Wan after residents reported a foul smell in the tap water, with multiple people saying that their skin itched after taking a shower. After the members of the opposition democratic party tested the water, they found the water contained metallic impurities such as
lead, aluminium, iron, zinc, and copper. Luckily, water used for consumption was reported to be safe, but residents and other experts still urged the Water Supplies Department to conduct further investigations to examine the quality of water.In 2019
, it was reported that excessive amounts of mercury were found in more than half of the tuna samples in Hong Kong. This was originally found and publicized by the Consumer Council, who also stated that these tuna samples exceeded the statutory limit for mercury content. This information is important to note for all people in Hong Kong as the overconsumption of this heavy metal can create adverse effects on the nervous system, especially to unborn babies. Adding on, the city's air quality
has also been found to be hazardous, as 20 percent of the PM2.5 particles in Hong Kong collected by scientists contained metals such as chromium, which is a dangerous element that may permanently damage the human DNA.