Missouri Well Data › St. Louis County
St. Louis County, Missouri: well depth, water level & drilling cost
✓ 1,717 MoDNR records · verified 2026-08-21
How deep are wells in St. Louis County, Missouri?
The median drilled well depth in St. Louis County is 445 ft, based on 1,652 wells with recorded depths in the state MoDNR database. Half of all wells fall between 326 ft and 545 ft; 90% are shallower than 619 ft. Wells drilled since 2016 have a median depth of 446 ft.
How much does it cost to drill a well in St. Louis County?
Applying published per-foot rates to the local median depth of 446 ft: drilling and casing alone typically runs $11,150–$28,990; a complete system including pump, pressure tank, and hookup typically runs $26,760–$44,600. Actual quotes depend on site access, geology, and casing requirements.
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What is the static water level in St. Louis County?
The median static water level is 200 ft below ground surface (middle half of wells: 120 ft–255 ft), from 1,535 measurements.
How much water do wells in St. Louis County produce?
The median tested yield is 30 gpm (middle half: 23 gpm–45 gpm), from 1,559 pump tests. A typical household needs 5–10 gpm.
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Drilled depth distribution
Who drills wells in St. Louis County?
Drillers by number of wells certified in this county, per well certification records filed with the Missouri Geological Survey. Missouri licenses individual drillers rather than companies, so these are the people who signed the certification.
| Driller | Wells since 2016 |
|---|---|
| DANIEL FLYNN | 49 |
| ALAN BURGESS | 48 |
| JOSHUA LAVY | 30 |
| RON HEATH | 26 |
| JASON BOYCE | 24 |
| DAVID GUZY | 23 |
| JEFF HATFIELD | 23 |
| ROBERT BUSSA | 18 |
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See every recorded well near any address — depths, water levels, yields, original driller's logs — in a one-time report.
Free lookup Property report — $29Method: 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). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.