Arizona Well Data › Pinal County

Pinal County, Arizona: well depth, water level & drilling cost

Name: Pinal County, Arizona water well statistics
Creator: Arizona Well Data
License: https://creativecommons.org/licenses/by/4.0/

✓ 16,212 ADWR records · verified 2026-10-12

500 ftmedian well depth

260 ft–720 fttypical depth range

240 ftmedian static water level

22 gpmmedian yield (7,302 tests)

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How deep are wells in Pinal County, Arizona?

The median drilled well depth in Pinal County is 500 ft, based on 13,013 wells with recorded depths in the state ADWR database. Half of all wells fall between 260 ft and 720 ft; 90% are shallower than 1,000 ft. Wells drilled since 2016 have a median depth of 580 ft.

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

Applying published per-foot rates to the local median depth of 580 ft: drilling and casing alone typically runs $14,500–$37,700; a complete system including pump, pressure tank, and hookup typically runs $34,800–$58,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Pinal County?

The median static water level is 240 ft below ground surface (middle half of wells: 106 ft–400 ft), from 11,194 measurements.

How much water do wells in Pinal County produce?

The median tested yield is 22 gpm (middle half: 10 gpm–600 gpm), from 7,302 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 535 50–100 ft 902 100–150 ft 622 150–200 ft 360 200–300 ft 1,115 300–400 ft 1,310 400–600 ft 3,195 600+ ft 4,974

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Well records by ZIP code in Pinal County

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

Maricopa (85139) — 1,299 wells, median 700 ft
San Tan Valley (85140) — 989 wells, median 600 ft
Apache Junction (85178) — 971 wells, median 500 ft
Florence (85132) — 970 wells, median 600 ft
Valley Farms (85191) — 947 wells, median 415 ft
Superior (85173) — 859 wells, median 232 ft
Mammoth (85618) — 786 wells, median 125 ft
Winkelman (85192) — 725 wells, median 77 ft
Coolidge (85128) — 715 wells, median 420 ft
Casa Grande (85194) — 695 wells, median 480 ft
Apache Junction (85119) — 671 wells, median 500 ft
Stanfield (85172) — 648 wells, median 930 ft
Kearny (85137) — 637 wells, median 140 ft
Eloy (85131) — 602 wells, median 600 ft
Casa Grande (85122) — 559 wells, median 240 ft
Oracle (85623) — 471 wells, median 215 ft
Red Rock (85145) — 419 wells, median 600 ft
San Manuel (85631) — 363 wells, median 201 ft
Casa Grande (85193) — 352 wells, median 400 ft
Picacho (85141) — 338 wells, median 1,000 ft
Maricopa (85138) — 312 wells, median 720 ft
Casa Grande (85130) — 300 wells, median 399 ft
Marana (85658) — 287 wells, median 600 ft
Arizona City (85123) — 287 wells, median 701 ft
Apache Junction (85117) — 204 wells, median 293 ft
Hayden (85135) — 171 wells, median 100 ft
Sacaton (85147) — 144 wells, median 530 ft
Apache Junction (85120) — 138 wells, median 600 ft
Gold Canyon (85118) — 53 wells, median 660 ft

Method: medians computed from ADWR records (ADWR registered wells, excluding the 51,744 registrations the department has cancelled; depths 0-5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.