⟁ Missouri Well Data field records · 2026 survey

Missouri Well Data › St. Charles County › O Fallon (63366)

O Fallon, MO (63366): well depth, water level & drilling cost

✓ 833 MoDNR records · St. Charles County

665 ftmedian well depth
440 ft–720 fttypical depth range
180 ftmedian static water level
60 gpmmedian yield (734 tests)

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How deep are wells in and around O Fallon (63366), Missouri?

The median drilled well depth in and around O Fallon (63366) is 665 ft, based on 797 wells with recorded depths in the state MoDNR database. Half fall between 440 ft and 720 ft; 90% are shallower than 760 ft.

How much does it cost to drill a well in and around O Fallon (63366)?

Applying published per-foot rates to the local median depth of 700 ft: drilling and casing alone typically runs $17,500–$45,500; a complete system including pump, pressure tank, and hookup typically runs $42,000–$70,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around O Fallon (63366)?

The median static water level is 180 ft below ground surface (middle half of wells: 140 ft–210 ft), from 753 measurements.

Drilled depth distribution

0–50 ft 5 50–100 ft 46 100–150 ft 0 150–200 ft 0 200–300 ft 6 300–400 ft 59 400–600 ft 201 600+ ft 480
Looking at a specific property in O Fallon (63366)?

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Part of St. Charles County well records.

Method: medians computed from MoDNR records (MoDNR certified water wells; depths 0-5,000 ft, with the file's 99999.9 and 88888 sentinel values excluded rather than clamped), grouped by ZIP from the recorded address. Cost estimate applies published per-foot ranges to the local median depth — full methodology & sources.