⟁ New Hampshire Well Data field records · 2026 survey

New Hampshire Well Data › Sullivan County

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

✓ 3,357 NHDES records · verified 2026-08-23

360 ftmedian well depth
225 ft–500 fttypical depth range
20 ftmedian static water level
6 gpmmedian yield (3,256 tests)

How deep are wells in Sullivan County, New Hampshire?

The median drilled well depth in Sullivan County is 360 ft, based on 3,356 wells with recorded depths in the state NHDES database. Half of all wells fall between 225 ft and 500 ft; 90% are shallower than 600 ft. Wells drilled since 2016 have a median depth of 420 ft.

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

Applying published per-foot rates to the local median depth of 420 ft: drilling and casing alone typically runs $10,500–$27,300; a complete system including pump, pressure tank, and hookup typically runs $25,200–$42,000. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Sullivan County?

The median static water level is 20 ft below ground surface (middle half of wells: 12 ft–38 ft), from 2,050 measurements.

How much water do wells in Sullivan County produce?

The median tested yield is 6 gpm (middle half: 3 gpm–15 gpm), from 3,256 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 71 50–100 ft 46 100–150 ft 245 150–200 ft 245 200–300 ft 601 300–400 ft 585 400–600 ft 1,190 600+ ft 373
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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.