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Cost to plug an injection or disposal well in Illinois

The tested median cost to plug a well in Illinois is $36,649, with a typical range of $8,148 to $49,088. That figure covers wells of all types: 152 of the 783 wells on file are injection or disposal wells.

Median, all well types
$36,649
AHigh confidence · typically within 17%
Typical range
$8,148 – $49,088
10th to 90th percentile
Injection or disposal wells on file
152
of 783 wells (19%)

What the figure means for an injection or disposal well in Illinois

The free figure is the statewide cost across all well types, tested on wells left out of the calculation. A figure for injection or disposal wells alone in Illinois passes testing and is part of Pro, along with 2 county-level figures. Individual wells vary widely: the records are mostly old, shallow orphan wells, so a deep or complex well can cost more.

The state's plugging cost index (first year = 100) read 2022: 113, 2023: 100.

Next steps

Data through June 2026. Wells are the reported costs behind each figure. Every figure is tested on wells left out of the calculation. AHigh confidence means a large sample and a figure typically within 25% of those wells; BModerate confidence means a smaller sample or within 40%. Anything weaker is shown as Insufficient data. How figures are tested.