⟁ Idaho Well Data field records · 2026 survey

Idaho Well Data › Ada County

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

✓ 17,986 IDWR records · verified 2026-08-21

129 ftmedian well depth
80 ft–221 fttypical depth range
40 ftmedian static water level
42 gpmmedian yield (10,028 tests)

How deep are wells in Ada County, Idaho?

The median drilled well depth in Ada County is 129 ft, based on 12,003 wells with recorded depths in the state IDWR database. Half of all wells fall between 80 ft and 221 ft; 90% are shallower than 365 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.

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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–84 ft), from 15,404 measurements.

How much water do wells in Ada County produce?

The median tested yield is 42 gpm (middle half: 25 gpm–75 gpm), from 10,028 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 1,082 50–100 ft 3,231 100–150 ft 2,508 150–200 ft 1,597 200–300 ft 1,757 300–400 ft 777 400–600 ft 743 600+ ft 308
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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.