⟁ Illinois Well Data field records · 2026 survey

Illinois Well Data › Washington County

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

✓ 857 ISGS records · verified 2026-08-20

70 ftmedian well depth
32 ft–143 fttypical depth range
8 gpmmedian yield (278 tests)

How deep are wells in Washington County, Illinois?

The median drilled well depth in Washington County is 70 ft, based on 737 wells with recorded depths in the state ISGS database. Half of all wells fall between 32 ft and 143 ft; 90% are shallower than 209 ft. Wells drilled since 2016 have a median depth of 150 ft.

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

Applying published per-foot rates to the local median depth of 150 ft: drilling and casing alone typically runs $3,750–$9,750; a complete system including pump, pressure tank, and hookup typically runs $9,000–$15,000. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Washington County?

Few static water level measurements are recorded for this county.

How much water do wells in Washington County produce?

The median tested yield is 8 gpm (middle half: 5 gpm–13 gpm), from 278 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 312 50–100 ft 105 100–150 ft 140 150–200 ft 81 200–300 ft 81 300–400 ft 9 400–600 ft 1 600+ ft 8

Who drills wells in Washington 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
Durbin, Dominique3
Greg A. Evans3
Dowdy, Tony Jr.2
Haake, Ralph2
Beckett, Donald1
Gebke, Randy1
Baker, James Curtis1

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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.