⟁ Illinois Well Data field records · 2026 survey

Illinois Well Data › St. Clair County › O Fallon (62269)

O Fallon, IL (62269): well depth, water level & drilling cost

✓ 349 ISGS records · St. Clair County

41 ftmedian well depth
32 ft–50 fttypical depth range
—median static water level
8 gpmmedian yield (19 tests)

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How deep are wells in and around O Fallon (62269), Illinois?

The median drilled well depth in and around O Fallon (62269) is 41 ft, based on 347 wells with recorded depths in the state ISGS database. Half fall between 32 ft and 50 ft; 90% are shallower than 85 ft.

How much does it cost to drill a well in and around O Fallon (62269)?

Applying published per-foot rates to the local median depth of 41 ft: drilling and casing alone typically runs $1,025–$2,665; a complete system including pump, pressure tank, and hookup typically runs $2,460–$4,100. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around O Fallon (62269)?

Few static water level measurements are recorded for this area.

Drilled depth distribution

0–50 ft 252 50–100 ft 65 100–150 ft 6 150–200 ft 9 200–300 ft 7 300–400 ft 5 400–600 ft 2 600+ ft 1
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Part of St. Clair County well records.

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), grouped by ZIP from the recorded address. Cost estimate applies published per-foot ranges to the local median depth — full methodology & sources.