California Well Data › Alameda County
Alameda County, California: well depth, water level & drilling cost
✓ 13,244 DWR records · verified 2026-10-02
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How deep are wells in Alameda County, California?
The median drilled well depth in Alameda County is 74 ft, based on 7,539 wells with recorded depths in the state DWR database. Half of all wells fall between 25 ft and 229 ft; 90% are shallower than 380 ft. Wells drilled since 2016 have a median depth of 50 ft.
How much does it cost to drill a well in Alameda County?
Applying published per-foot rates to the local median depth of 50 ft: drilling and casing alone typically runs $1,250–$3,250; a complete system including pump, pressure tank, and hookup typically runs $3,000–$5,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Alameda County?
The median static water level is 33 ft below ground surface (middle half of wells: 12 ft–70 ft), from 1,668 measurements.
How much water do wells in Alameda County produce?
The median tested yield is 25 gpm (middle half: 10 gpm–60 gpm), from 1,044 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Alameda County?
Companies by number of wells completed in this county since 2016, per filed well completion reports (California Department of Water Resources).
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Well records by ZIP code in Alameda County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Livermore (94550) — 1,368 wells, median 215 ft
- Pleasanton (94566) — 823 wells, median 120 ft
- Union City (94587) — 618 wells, median 149 ft
- Newark (94560) — 592 wells, median 112 ft
- Fremont (94539) — 531 wells, median 150 ft
- Fremont (94538) — 512 wells, median 55 ft
- Fremont (94536) — 382 wells, median 129 ft
- Oakland (94615) — 372 wells, median 14 ft
- Livermore (94551) — 366 wells, median 220 ft
- San Leandro (94577) — 317 wells, median 60 ft
- Sunol (94586) — 293 wells, median 220 ft
- Dublin (94568) — 293 wells, median 86 ft
- Hayward (94545) — 281 wells, median 180 ft
- Oakland (94601) — 278 wells, median 27 ft
- Pleasanton (94588) — 259 wells, median 158 ft
- San Lorenzo (94580) — 246 wells, median 34 ft
- Hayward (94544) — 196 wells, median 72 ft
- Fremont (94555) — 193 wells, median 122 ft
- Oakland (94603) — 192 wells, median 35 ft
- San Leandro (94579) — 188 wells, median 43 ft
- Hayward (94541) — 187 wells, median 77 ft
- Alameda (94501) — 178 wells, median 34 ft
- Castro Valley (94552) — 177 wells, median 200 ft
- Tracy (95377) — 159 wells, median 250 ft
- Fremont (94537) — 147 wells, median 89 ft
- Oakland (94609) — 145 wells, median 20 ft
- Hayward (94543) — 120 wells, median 91 ft
- Oakland (94607) — 116 wells, median 25 ft
- Castro Valley (94546) — 102 wells, median 66 ft
- Oakland (94614) — 102 wells, median 16 ft
- Emeryville (94662) — 100 wells, median 33 ft
- Oakland (94612) — 94 wells, median 10 ft
- Oakland (94621) — 80 wells, median 30 ft
- San Leandro (94578) — 77 wells, median 30 ft
- Piedmont (94620) — 73 wells, median 120 ft
- Hayward (94542) — 70 wells, median 124 ft
- Oakland (94602) — 65 wells, median 120 ft
- Emeryville (94608) — 59 wells, median 11 ft
- Oakland (94604) — 58 wells, median 50 ft
- Albany (94706) — 58 wells, median 21 ft
- Oakland (94605) — 56 wells, median 120 ft
- Alameda (94502) — 51 wells, median 20 ft
Method: medians computed from DWR records (filed well completion reports, water-supply uses only (destruction, repair and monitoring wells excluded); depths 0–5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.