在20世纪90年代，甲醛在饮用水中很少被提及，在旧的饮用水卫生标准中也没有甲醛的指标。然而，水环境污染日益严重。饮用水中的甲醛越来越受到人们的关注。新颁布的饮用水卫生标准中加入了甲醛指标，限值为0.9mg/L。
In the 1990s, formaldehyde was rarely mentioned in drinking water, and there was no index of formaldehyde in the old drinking water sanitation standard. However, the water environment pollution is increasingly serious. Formaldehyde in drinking water has attracted more and more attention. Formaldehyde index is added to the newly issued drinking water sanitation standard, and the limit value is 0.9mg/l.
甲醛是无色、刺激性气体，主要用于生产脲醛树脂、酚类、三聚氰胺;还用于生产化妆品、抗真菌剂、纺织品防腐剂。水中甲醛主要来源于工业废水。饮用水中的甲醛主要是由原水中的天然有机化合物经臭氧或氯后产生的。臭氧化饮用水中甲醛的浓度可达30微米/ l，也可从聚甲醛塑料袋单元释放出饮用水中的甲醛。甲醛的物理化学性质表明它不太可能从水中蒸发，因此通过淋浴接触甲醛的可能性很小。
Formaldehyde is a colorless and irritant gas, which is mainly used to produce urea formaldehyde resin, phenols and melamine; it is also used to produce cosmetics, antimicrobials and textile preservatives. Formaldehyde in water mainly comes from industrial wastewater. Formaldehyde in drinking water is mainly produced by natural organic compounds in raw water disinfected by ozone or chlorine. The concentration of formaldehyde in ozonized drinking water can be up to 30 μ M / L, which can also be released from polyformaldehyde plastic bag unit. The physical and chemical properties of formaldehyde show that it is unlikely to evaporate from water, so the possibility of contacting formaldehyde through shower is very small.
根据世界卫生组织2005年发布的数据，本研究对大鼠饮用水甲醛中毒进行了为期2年的实验，发现甲醛对大鼠口腔和胃粘膜产生了病理作用，并将饮用水中甲醛的允许浓度推断为2.6mg/L。癌症研究机构将甲醛列为2A类致癌物。
According to the data released by the World Health Organization in 2005, this study conducted a two-year experiment on formaldehyde poisoning in drinking water of rats. It was found that formaldehyde had a pathological effect on the oral and gastric mucosa of rats, and the allowable concentration of formaldehyde in drinking water was inferred as 2.6mg/l. The international agency for research on cancer lists formaldehyde as a class 2A carcinogen.
我国2001年的饮用水质量卫生标准规定，饮用水中甲醛的限量为0.9mg/L。考虑到我国饮用水臭氧的快速发展，2006年修订《饮用水卫生标准》时，卫生部仍采用了臭氧限量。
According to China's 2001 drinking water quality and hygiene standard, the limit of formaldehyde in drinking water is 0.9mg/l. In view of the rapid development of ozone disinfection of drinking water in China, the Ministry of health still adopted the ozone disinfection limit when revising the drinking water sanitation standard in 2006.
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