Illinois Well Data › Kendall County

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

Name: Kendall County, Illinois water well statistics
Creator: Illinois Well Data
License: https://creativecommons.org/licenses/by/4.0/

✓ 5,011 ISGS records · verified 2026-10-12

235 ftmedian well depth

145 ft–498 fttypical depth range

15 gpmmedian yield (2,393 tests)

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How deep are wells in Kendall County, Illinois?

The median drilled well depth in Kendall County is 235 ft, based on 4,979 wells with recorded depths in the state ISGS database. Half of all wells fall between 145 ft and 498 ft; 90% are shallower than 600 ft. Wells drilled since 2016 have a median depth of 360 ft.

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

Applying published per-foot rates to the local median depth of 360 ft: drilling and casing alone typically runs $9,000–$23,400; a complete system including pump, pressure tank, and hookup typically runs $21,600–$36,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Kendall County?

Few static water level measurements are recorded for this county.

How much water do wells in Kendall County produce?

The median tested yield is 15 gpm (middle half: 10 gpm–20 gpm), from 2,393 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 62 50–100 ft 368 100–150 ft 841 150–200 ft 710 200–300 ft 1,031 300–400 ft 498 400–600 ft 939 600+ ft 530

Who drills wells in Kendall County?

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

Driller	Wells since 2016
Knierim, Ken/K & K Well Drlg.	156
Neely, Mark S.	63
Liberg, Steve Jr.	37
Area Well & Pump	6
Stinnett, David	2
Will County Well & Pump	2
Layne Christensen Co.	2
Strange, Robert E.	1

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Well records by ZIP code in Kendall County

Median depth, water level, and yield for each ZIP code with recorded wells.

Yorkville (60560) — 1,413 wells, median 475 ft
Oswego (60543) — 876 wells, median 485 ft
Minooka (60447) — 620 wells, median 220 ft
Plano (60545) — 573 wells, median 165 ft
Newark (60541) — 516 wells, median 215 ft
Bristol (60512) — 492 wells, median 120 ft
Millbrook (60536) — 362 wells, median 186 ft

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.