Idaho Well Data › Ada County

Ada County, Idaho: well depth, water level & drilling cost

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

✓ 18,374 IDWR records · verified 2026-10-12

130 ftmedian well depth

80 ft–223 fttypical depth range

40 ftmedian static water level

42 gpmmedian yield (10,228 tests)

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How deep are wells in Ada County, Idaho?

The median drilled well depth in Ada County is 130 ft, based on 12,280 wells with recorded depths in the state IDWR database. Half of all wells fall between 80 ft and 223 ft; 90% are shallower than 368 ft. Wells drilled since 2016 have a median depth of 180 ft.

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

Applying published per-foot rates to the local median depth of 180 ft: drilling and casing alone typically runs $4,500–$11,700; a complete system including pump, pressure tank, and hookup typically runs $10,800–$18,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Ada County?

The median static water level is 40 ft below ground surface (middle half of wells: 17 ft–85 ft), from 15,732 measurements.

How much water do wells in Ada County produce?

The median tested yield is 42 gpm (middle half: 25 gpm–75 gpm), from 10,228 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 1,125 50–100 ft 3,279 100–150 ft 2,551 150–200 ft 1,629 200–300 ft 1,808 300–400 ft 803 400–600 ft 767 600+ ft 318

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Well records by ZIP code in Ada County

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

Boise (83709) — 2,829 wells, median 110 ft
Eagle (83616) — 2,059 wells, median 130 ft
Kuna (83634) — 1,792 wells, median 202 ft
Star (83669) — 1,359 wells, median 184 ft
Meridian (83680) — 1,162 wells, median 130 ft
Boise (83713) — 1,111 wells, median 98 ft
Boise (83703) — 1,000 wells, median 80 ft
Boise (83701) — 919 wells, median 103 ft
Meridian (83646) — 875 wells, median 122 ft
Boise (83706) — 847 wells, median 74 ft
Meridian (83642) — 730 wells, median 133 ft
Boise (83704) — 699 wells, median 95 ft
Boise (83712) — 621 wells, median 186 ft
Garden City (83714) — 585 wells, median 225 ft
Boise (83716) — 501 wells, median 300 ft
Boise (83705) — 364 wells, median 131 ft
Boise (83707) — 356 wells, median 61 ft
Boise (83702) — 339 wells, median 76 ft
Boise (83708) — 334 wells, median 412 ft
Mountain Home Afb (83648) — 260 wells, median 397 ft
Boise (83724) — 80 wells, median 118 ft

Method: medians computed from IDWR records (IDWR well records, excluding the 8,758 monitoring, injection, test, dewatering, cathodic-protection and heat-exchange wells that are not water supplies; depths 0-5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.