Despite their different water source background , water purification technology and water quality control must both meet their countrys water quality standards . apart from meeting safety , hygiene , appearance and potability requirements , all efforts should be better than exceed the standards for water quality 尽管各水源生态不同，基本上各国之自来水处理及水质控制皆须符合水质标准，除达到安全卫生外观及适饮上的要求外，并力求超越水质标准。
