⟁ New Hampshire Well Data field records · 2026 survey

New Hampshire Well Data › Coos County

Coos County, New Hampshire: well depth, water level & drilling cost

✓ 3,695 NHDES records · verified 2026-08-23

304 ftmedian well depth
205 ft–440 fttypical depth range
20 ftmedian static water level
8 gpmmedian yield (3,578 tests)

How deep are wells in Coos County, New Hampshire?

The median drilled well depth in Coos County is 304 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.

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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 812 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.

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Drilled depth distribution

0–50 ft 94 50–100 ft 72 100–150 ft 307 150–200 ft 310 200–300 ft 885 300–400 ft 728 400–600 ft 994 600+ ft 305
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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.