By Susan Fenhaus, PE, and Kurtis DeShaw, PE

If you’re reading this article, you may have circled October 16, 2024, on your calendar. This is the Environmental Protection Agency’s (EPA) deadline to submit your water system’s Lead Service Line (LSL) inventory. While not due for a while, this project can be long and involves lots of planning and possibly some detective work on your part. We have combed through some helpful pieces of information to help streamline this process for you.

While following EPA’s guidelines, each state has provided tools and tips to help their community and non-transient non-community water systems complete and submit inventories of their service lines. This article will focus on the states of Montana, Wyoming, Oregon, and Washington and examine the EPA’s references.