California Well Data › San Diego County

San Diego County, California: well depth, water level & drilling cost

Name: San Diego County, California water well statistics
Creator: California Well Data
License: https://creativecommons.org/licenses/by/4.0/

✓ 25,802 DWR records · verified 2026-10-02

305 ftmedian well depth

153 ft–591 fttypical depth range

60 ftmedian static water level

25 gpmmedian yield (14,033 tests)

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How deep are wells in San Diego County, California?

The median drilled well depth in San Diego County is 305 ft, based on 19,079 wells with recorded depths in the state DWR database. Half of all wells fall between 153 ft and 591 ft; 90% are shallower than 880 ft. Wells drilled since 2016 have a median depth of 300 ft.

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

Applying published per-foot rates to the local median depth of 300 ft: drilling and casing alone typically runs $7,500–$19,500; a complete system including pump, pressure tank, and hookup typically runs $18,000–$30,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in San Diego County?

The median static water level is 60 ft below ground surface (middle half of wells: 25 ft–130 ft), from 5,390 measurements.

How much water do wells in San Diego County produce?

The median tested yield is 25 gpm (middle half: 10 gpm–60 gpm), from 14,033 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 1,443 50–100 ft 1,146 100–150 ft 1,592 150–200 ft 1,575 200–300 ft 2,854 300–400 ft 2,481 400–600 ft 3,266 600+ ft 4,722

Who drills wells in San Diego County?

Companies by number of wells completed in this county since 2016, per filed well completion reports (California Department of Water Resources).

Driller	Wells since 2016
STEHLY BROTHERS DRILLING INC	517
CORRPRO COMPANIES INC	387
FAIN DRILLING & PUMP CO INC	297
J & H DRILLING CO INC	204
FARWEST CORROSION CONTROL COMPANY	167
A B C LIOVIN DRILLING INC	89
CASCADE DRILLING LP	85
DIERKOP PAUL	79

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Well records by ZIP code in San Diego County

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

Ramona (92065) — 1,966 wells, median 310 ft
Valley Center (92082) — 1,020 wells, median 500 ft
Julian (92036) — 1,018 wells, median 305 ft
Jamul (91935) — 995 wells, median 425 ft
Bonsall (92003) — 779 wells, median 610 ft
Alpine (91901) — 711 wells, median 460 ft
Lakeside (92040) — 646 wells, median 300 ft
Alpine (91903) — 580 wells, median 440 ft
Descanso (91916) — 545 wells, median 340 ft
Campo (91906) — 517 wells, median 300 ft
Boulevard (91905) — 515 wells, median 300 ft
Dulzura (91917) — 515 wells, median 400 ft
Pala (92059) — 493 wells, median 475 ft
Escondido (92027) — 460 wells, median 360 ft
Fallbrook (92088) — 455 wells, median 515 ft
Santa Ysabel (92070) — 390 wells, median 358 ft
Fallbrook (92028) — 381 wells, median 600 ft
Escondido (92025) — 336 wells, median 198 ft
Borrego Springs (92004) — 329 wells, median 496 ft
Rancho Santa Fe (92067) — 328 wells, median 290 ft
Camp Pendleton (92055) — 322 wells, median 195 ft
San Diego (92128) — 311 wells, median 566 ft
Palomar Mountain (92060) — 304 wells, median 348 ft
Pauma Valley (92061) — 297 wells, median 307 ft
El Cajon (92019) — 293 wells, median 281 ft
Poway (92064) — 274 wells, median 610 ft
Warner Springs (92086) — 265 wells, median 300 ft
San Diego (92127) — 262 wells, median 399 ft
Poway (92074) — 238 wells, median 445 ft
Vista (92084) — 236 wells, median 470 ft
Potrero (91963) — 235 wells, median 380 ft
Escondido (92026) — 232 wells, median 393 ft
El Cajon (92022) — 222 wells, median 90 ft
El Cajon (92021) — 208 wells, median 300 ft
San Diego (92117) — 185 wells, median 90 ft
Chula Vista (91911) — 184 wells, median 175 ft
San Clemente (92672) — 183 wells, median 11 ft
Santee (92071) — 179 wells, median 49 ft
Oceanside (92057) — 179 wells, median 200 ft
San Ysidro (92173) — 155 wells, median 150 ft
Escondido (92029) — 152 wells, median 572 ft
San Marcos (92069) — 152 wells, median 385 ft
San Luis Rey (92068) — 149 wells, median 150 ft
El Cajon (92020) — 148 wells, median 75 ft
Santee (92072) — 146 wells, median 42 ft
San Marcos (92079) — 141 wells, median 300 ft
Chula Vista (91909) — 139 wells, median 140 ft
Ranchita (92066) — 136 wells, median 275 ft
San Diego (92136) — 135 wells, median 36 ft
San Diego (92154) — 130 wells, median 109 ft
Escondido (92030) — 130 wells, median 38 ft
San Diego (92103) — 128 wells, median 150 ft
National City (91950) — 119 wells, median 150 ft
Guatay (91931) — 112 wells, median 368 ft
National City (91951) — 110 wells, median 150 ft
San Diego (92109) — 109 wells, median 205 ft
San Diego (92106) — 105 wells, median 200 ft
Spring Valley (91978) — 102 wells, median 200 ft
San Diego (92121) — 101 wells, median 49 ft
San Diego (92112) — 96 wells, median 28 ft
San Diego (92111) — 95 wells, median 230 ft
Pine Valley (91962) — 94 wells, median 300 ft
San Marcos (92078) — 93 wells, median 480 ft
Carlsbad (92013) — 88 wells, median 150 ft
San Diego (92130) — 87 wells, median 190 ft
Oceanside (92054) — 84 wells, median 25 ft
Chula Vista (91910) — 83 wells, median 150 ft
Jacumba (91934) — 80 wells, median 260 ft
Coronado (92178) — 80 wells, median 150 ft
Mount Laguna (91948) — 79 wells, median 240 ft
San Diego (92114) — 78 wells, median 150 ft
La Mesa (91942) — 73 wells, median 80 ft
San Diego (92113) — 69 wells, median 95 ft
San Diego (92101) — 68 wells, median 168 ft
Rancho Santa Fe (92091) — 67 wells, median 190 ft
Imperial Beach (91933) — 62 wells, median 296 ft
Lemon Grove (91945) — 62 wells, median 150 ft
Oceanside (92049) — 61 wells, median 150 ft
San Diego (92140) — 60 wells, median 23 ft
San Diego (92123) — 60 wells, median 120 ft
Chula Vista (91915) — 59 wells, median 305 ft
Spring Valley (91977) — 57 wells, median 108 ft
San Diego (92110) — 55 wells, median 150 ft
San Diego (92120) — 55 wells, median 145 ft
San Diego (92108) — 54 wells, median 74 ft
Spring Valley (91976) — 53 wells, median 92 ft
Vista (92081) — 53 wells, median 384 ft
San Diego (92199) — 52 wells, median 130 ft
San Diego (92126) — 52 wells, median 50 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.