Idaho Well Data › Lemhi County
Lemhi County, Idaho: well depth, water level & drilling cost
✓ 3,364 IDWR records · verified 2026-10-12
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How deep are wells in Lemhi County, Idaho?
The median drilled well depth in Lemhi County is 65 ft, based on 2,313 wells with recorded depths in the state IDWR database. Half of all wells fall between 38 ft and 180 ft; 90% are shallower than 308 ft. Wells drilled since 2016 have a median depth of 120 ft.
How much does it cost to drill a well in Lemhi County?
Applying published per-foot rates to the local median depth of 120 ft: drilling and casing alone typically runs $3,000–$7,800; a complete system including pump, pressure tank, and hookup typically runs $7,200–$12,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Lemhi County?
The median static water level is 20 ft below ground surface (middle half of wells: 9 ft–40 ft), from 3,015 measurements.
How much water do wells in Lemhi County produce?
The median tested yield is 18 gpm (middle half: 10 gpm–25 gpm), from 2,320 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
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Well records by ZIP code in Lemhi County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Salmon (83467) — 1,385 wells, median 60 ft
- Carmen (83462) — 533 wells, median 65 ft
- Tendoy (83468) — 268 wells, median 72 ft
- North Fork (83466) — 224 wells, median 52 ft
- Leadore (83464) — 217 wells, median 80 ft
- Gibbonsville (83463) — 207 wells, median 71 ft
- Lemhi (83465) — 168 wells, median 70 ft
- Ellis (83235) — 111 wells, median 80 ft
- May (83253) — 109 wells, median 120 ft
- Cobalt (83229) — 74 wells, median 115 ft
- Shoup (83469) — 57 wells, median 98 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.