Data downloads
Published state estimates and the Plugging Cost Index as CSV and JSON. 11,741 reported plugging costs in 25 states, data through 2026-06-30.
| File | Contents | Format |
|---|---|---|
| plugging-index-state-estimates.csv | Every graded statewide and well-type estimate: median, percentiles, grade, sample size, held-out error. Ungraded states are listed without figures. | CSV |
| plugging-cost-index.csv | National quarterly and annual Plugging Cost Index, and graded state annual values. | CSV |
| estimates.json | Everything on the site, including county and depth-band estimates, as one file. | JSON |
How to cite
Source: Plugging Index, pluggingindex.com, data through 2026-06-30
The first line of each CSV file is that citation, starting with #; the column names are on the second line. Figures below grade B are not included anywhere. Read the limitations before using them.
The figures are derived from US federal public-domain records. You may reuse them with the citation above.