New Hampshire Well Data › Belknap County
Belknap County, New Hampshire: well depth, water level & drilling cost
✓ 8,611 NHDES records · verified 2026-10-19
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How deep are wells in Belknap County, New Hampshire?
The median drilled well depth in Belknap County is 340 ft, based on 8,606 wells with recorded depths in the state NHDES database. Half of all wells fall between 225 ft and 500 ft; 90% are shallower than 620 ft. Wells drilled since 2016 have a median depth of 405 ft.
How much does it cost to drill a well in Belknap County?
Applying published per-foot rates to the local median depth of 405 ft: drilling and casing alone typically runs $10,125–$26,325; a complete system including pump, pressure tank, and hookup typically runs $24,300–$40,500. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Belknap County?
The median static water level is 20 ft below ground surface (middle half of wells: 10 ft–30 ft), from 4,099 measurements.
How much water do wells in Belknap County produce?
The median tested yield is 8 gpm (middle half: 4 gpm–20 gpm), from 8,400 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
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Well records by ZIP code in Belknap County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Meredith (03253) — 1,153 wells, median 456 ft
- Alton Bay (03810) — 711 wells, median 280 ft
- Gilmanton (03237) — 698 wells, median 300 ft
- Center Barnstead (03225) — 691 wells, median 305 ft
- Center Harbor (03226) — 689 wells, median 430 ft
- Gilford (03249) — 602 wells, median 310 ft
- Gilmanton Iron Works (03837) — 560 wells, median 300 ft
- Winnisquam (03289) — 485 wells, median 320 ft
- Laconia (03247) — 442 wells, median 400 ft
- Belmont (03220) — 440 wells, median 305 ft
- Tilton (03298) — 413 wells, median 305 ft
- Barnstead (03218) — 393 wells, median 305 ft
- Laconia (03246) — 359 wells, median 340 ft
- Sanbornton (03269) — 348 wells, median 300 ft
- New Hampton (03256) — 348 wells, median 365 ft
- Alton (03809) — 309 wells, median 270 ft
- Tilton (03276) — 308 wells, median 325 ft
- Lochmere (03252) — 219 wells, median 310 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.