The 1623 method was edited and promulgated by USEPA.It is the most commonly used method for detection of Cryptosporidium and Giardia in water.

• 美国国家环保局(USEPA)制定并发布的1623方法是目前国际上常用的水中隐孢子虫和贾第鞭毛虫标准检测方法,该方法存在成本高、回收率低等缺陷。