⟁ New Hampshire Well Data field records · 2026 survey

New Hampshire Well Data › Grafton County

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

✓ 8,614 NHDES records · verified 2026-08-23

343 ftmedian well depth
240 ft–500 fttypical depth range
20 ftmedian static water level
7 gpmmedian yield (8,302 tests)

How deep are wells in Grafton County, New Hampshire?

The median drilled well depth in Grafton County is 343 ft, based on 8,613 wells with recorded depths in the state NHDES database. Half of all wells fall between 240 ft and 500 ft; 90% are shallower than 600 ft. Wells drilled since 2016 have a median depth of 406 ft.

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

Applying published per-foot rates to the local median depth of 406 ft: drilling and casing alone typically runs $10,150–$26,390; a complete system including pump, pressure tank, and hookup typically runs $24,360–$40,600. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Grafton County?

The median static water level is 20 ft below ground surface (middle half of wells: 15 ft–40 ft), from 3,373 measurements.

How much water do wells in Grafton County produce?

The median tested yield is 7 gpm (middle half: 3 gpm–20 gpm), from 8,302 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 165 50–100 ft 78 100–150 ft 467 150–200 ft 499 200–300 ft 1,909 300–400 ft 1,779 400–600 ft 2,672 600+ ft 1,044
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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.