# Well-Record Provenance by State — Change Log

## Version 2026.1 — July 23, 2026

- Published Edition 1 with 13 state rows.
- Separated current agency inventory totals from USGWD geospatial quality-assurance counts.
- Corrected the Pennsylvania coverage description to distinguish the 1956 Act passage from mid-1960s paper-report submissions.
- Corrected the National Water-Well Database chronology to Minnesota (2022), Michigan (2025), and Louisiana (May 2026).
- Added Michigan's official 2024 scoped average: 117 feet across 13,464 records submitted that calendar year.
- Preserved null or unasserted values instead of inferring agency totals, reporting dates, or public systems.
- Standardized the organization name as Lakeland Well Pump Repair Research.

## Maintenance rule

The visible verification date changes only after the cited sources and affected rows are rechecked. A source update, method change, row addition, correction, or deletion must be recorded here with the affected fields.