Lead Inventory Progress by State

Data current as of June 2026. Recomputed by ZipCheckup from federal data each build.

Across 50 states, EPA SDWIS records show 624,090 unknown-material service lines reclassified between 2026Q1 and 2026Q2, as of June 2026.

By state

We report two independent facts side by side and do not rank states. A larger count reflects the size of a state's inventory and its reporting activity, not a judgment about water safety.

How we compute this

We diff two consecutive federal SDWIS snapshots and report, per state, the count of unknown-material lines reclassified and the number of systems that completed an inventory. The table lists states alphabetically.

We report two independent facts side by side and do not rank states. A larger count reflects both the size of a state's inventory and its reporting activity, not a judgment about water safety.

EPA region codes and tribal entries are excluded from the state table so each row is a single U.S. state or equivalent.

Frequently asked questions

@misc{zipcheckup-findings-lead-inventory-progress-by-state,
  author = {{ZipCheckup}},
  title  = {{Lead Inventory Progress by State}},
  year   = {2026},
  url    = {https://zipcheckup.com/findings/lead-inventory-progress-by-state/}
}