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Indiana lead service line map

The 1,362 community and non-transient non-community water systems in the EPA Service Line Inventory (SDWIS Federal Reports) for Indiana, each with a trigger score for lead service line replacement pressure: a 0–100 prioritisation index built from published records (line counts, funding signals and deadline timing), not a prediction that any system will start a project. Hover, tap or tab to a system for its trigger score, its lines and what the state's SRF list says about it.
State list used: Indiana IFA SFY2027 Drinking Water Project Priority List (final, 23 June 2026). 89 of 94 list projects matched to a system on this map, by PWSID.
1,362systems scored64lead or galvanized line replacement candidates733,979lines to replace or investigate241with a health-based violation since 202488on the state SRF list, any project type30 of them report no lead, galvanized or unknown lines
County shading = replacement pool (lead + galvanized-requiring-replacement + unknown-material lines). Dots = the top 250 systems by trigger score, placed inside the county they serve (SDWIS publishes no coordinates), so position within a county is approximate and systems in one county overlap. Green ring = on the state SRF list for any project type.
How the trigger score works

Regulatory pressure (0–40): lead and galvanized-requiring-replacement line counts and unknown-material line counts. A latest lead action-level exceedance would add 6; it is not assessed in this snapshot, so the regulatory score can reach at most 34 here.

On the state SRF list, any project type (0–15): named on the state's project list for any project, lead related or not (+10); principal forgiveness or eligibility (+5), not scored for this list because no forgiveness information was read from it; listed projects totalling $1M or more (+5). The +5 for an active project cannot be scored: this list does not state project status. Each card shows what the list says about the project.

Deadline proximity (0–25): days to the 1 November 2027 baseline lead service line inventory deadline. Every system gets 15 points in this snapshot.

Recent change (0–10): needs a change history; every system scores 0 in this snapshot.

The trigger score is a prioritisation index built from published records, not a prediction. It does not say that a listed project is lead related.