In November 2019, the USEPA published the revisions to the Lead and Copper Rule with seemingly small changes that could have significant implications.

中文翻译：

---

了解铅和铜规则的拟议修订

2019年11月，美国环保局发布了《铅和铜规则》修订版，其中似乎很小的更改可能会产生重大影响。