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How Deep Are Wells in Jefferson County, NY?
The median residential well in Jefferson County is 105 ft deep, based on 2,389 completion reports filed with the New York State Department of Environmental Conservation. Most fall between 52 and 224 ft; the deepest on record is 606 ft.
That is 93 ft shallower than the New York state-wide average of 198 ft (an n-weighted average across every New York county with reported data). Depth depends on local geology, your own site could sit well outside Jefferson County's typical range.
Source and method: New York State Department of Environmental Conservation water well completion reports (NYS GIS Clearinghouse), extracted 2026-07-14. Figures include only wells recorded as residential (domestic) use, with a reported depth between 15 and 2,000 ft (to exclude likely data-entry errors). This dataset carries no completion date, so figures cover all domestic wells on record rather than only recent ones, and DEC notes the driller-submitted data are in most cases not verified. These are figures self-reported by licensed drillers to the state; treat this as a planning reference, not a guarantee for any specific property.
Jefferson County well depth at a glance
| Metric | Value |
|---|---|
| Median depth | 105 ft |
| Typical range (10th-90th pct) | 52-224 ft |
| Full range on record | 16-606 ft |
| Completion reports used | 2,389 |
| New York state-wide average (weighted) | 198 ft |
| Estimated drilling cost at county median | $2,625-$6,825 |
Cost estimate is the county median depth (105 ft) times HomeAdvisor's national $25-$65 per-foot drilling range, cited on our cost guide. It covers drilling only, not casing, pump, or pressure tank, and it is a planning range, not a quote. Try the well cost estimator with this county's median pre-filled as a starting point.
Frequently asked
How deep is a well in Jefferson County, NY?
The median residential well in Jefferson County is 105 ft deep, based on 2,389 completion reports filed with the New York State Department of Environmental Conservation. Most wells fall between 52 and 224 ft; the deepest on record is 606 ft.
How much does it cost to drill a well in Jefferson County?
Using the county's 105 ft median depth and the national $25-$65 per foot drilling range HomeAdvisor reports, a well drilled to the local median would run roughly $2,625 to $6,825 for drilling alone, before casing, pump, or pressure tank. That is a planning range, not a quote, get quotes from licensed local contractors for your property.
Who can drill a well in Jefferson County, NY?
Check any contractor's current license status before hiring; requirements vary by state. See our guide on how to hire a licensed well driller, or browse listed contractors serving New York.
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See the full New York well depth by county table, or the guide to hiring a licensed well driller.