New Hampshire Well Data › Coos County
Coos County, New Hampshire: well depth, water level & drilling cost
✓ 3,695 NHDES records · verified 2026-10-19
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How deep are wells in Coos County, New Hampshire?
The median drilled well depth in Coos County is 305 ft, based on 3,695 wells with recorded depths in the state NHDES database. Half of all wells fall between 205 ft and 440 ft; 90% are shallower than 540 ft. Wells drilled since 2016 have a median depth of 360 ft.
How much does it cost to drill a well in Coos County?
Applying published per-foot rates to the local median depth of 360 ft: drilling and casing alone typically runs $9,000–$23,400; a complete system including pump, pressure tank, and hookup typically runs $21,600–$36,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Coos County?
The median static water level is 20 ft below ground surface (middle half of wells: 10 ft–40 ft), from 817 measurements.
How much water do wells in Coos County produce?
The median tested yield is 8 gpm (middle half: 3 gpm–20 gpm), from 3,578 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
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Well records by ZIP code in Coos County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Pittsburg (03592) — 755 wells, median 245 ft
- Colebrook (03576) — 634 wells, median 305 ft
- Whitefield (03598) — 418 wells, median 380 ft
- Lancaster (03584) — 303 wells, median 305 ft
- Milan (03588) — 293 wells, median 320 ft
- Jefferson (03583) — 219 wells, median 400 ft
- Randolph (03593) — 188 wells, median 320 ft
- Twin Mountain (03595) — 168 wells, median 325 ft
- North Stratford (03590) — 140 wells, median 300 ft
- Errol (03579) — 131 wells, median 360 ft
- Berlin (03570) — 118 wells, median 280 ft
- Gorham (03581) — 114 wells, median 400 ft
- Groveton (03582) — 103 wells, median 300 ft
- Mount Washington (03589) — 68 wells, median 300 ft
Method: medians computed from NHDES records (NHDES Water Well Inventory, water-supply wells only (test/exploration and closed-loop geothermal 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.