⟁ Illinois Well Data field records · 2026 survey

Illinois Well Data › Monroe County

Monroe County, Illinois: well depth, yield & drilling cost

✓ 2,584 ISGS records · verified 2026-08-20

210 ftmedian well depth
142 ft–360 fttypical depth range
11 gpmmedian yield (1,790 tests)

How deep are wells in Monroe County, Illinois?

The median drilled well depth in Monroe County is 210 ft, based on 2,580 wells with recorded depths in the state ISGS database. Half of all wells fall between 142 ft and 360 ft; 90% are shallower than 477 ft. Wells drilled since 2016 have a median depth of 179 ft.

How much does it cost to drill a well in Monroe County?

Applying published per-foot rates to the local median depth of 179 ft: drilling and casing alone typically runs $4,475–$11,635; a complete system including pump, pressure tank, and hookup typically runs $10,740–$17,900. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Monroe County?

Few static water level measurements are recorded for this county.

How much water do wells in Monroe County produce?

The median tested yield is 11 gpm (middle half: 3 gpm–25 gpm), from 1,790 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 69 50–100 ft 239 100–150 ft 445 150–200 ft 393 200–300 ft 492 300–400 ft 416 400–600 ft 495 600+ ft 31

Who drills wells in Monroe County?

Companies and licensed drillers by number of wells logged in this county, per records filed with the Illinois State Geological Survey.

DrillerWells since 2016
Haake, Ralph38
Dohrman, Dale Raymond29
Harriss, Chuck23
Beckett, Donald16
Gregory Horman11
Greg A. Evans10
Ray Mueller3
D & S Drillling3

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Method: medians computed from ISGS records (ISGS water wells; engineering, mineral and stratigraphic test borings, mine shafts, outcrops and monitoring wells are excluded, as are wells the survey records as plugged; depths 0-5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.