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How Deep Are Wells in Tompkins County, NY?
The median residential well in Tompkins County is 140 ft deep, based on 2,618 completion reports filed with the New York State Department of Environmental Conservation. Most fall between 55 and 260 ft; the deepest on record is 1015 ft.
That is 58 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 Tompkins 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.
Tompkins County well depth at a glance
| Metric | Value |
|---|---|
| Median depth | 140 ft |
| Typical range (10th-90th pct) | 55-260 ft |
| Full range on record | 20-1015 ft |
| Completion reports used | 2,618 |
| New York state-wide average (weighted) | 198 ft |
| Estimated drilling cost at county median | $3,500-$9,100 |
Cost estimate is the county median depth (140 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 Tompkins County, NY?
The median residential well in Tompkins County is 140 ft deep, based on 2,618 completion reports filed with the New York State Department of Environmental Conservation. Most wells fall between 55 and 260 ft; the deepest on record is 1015 ft.
How much does it cost to drill a well in Tompkins County?
Using the county's 140 ft median depth and the national $25-$65 per foot drilling range HomeAdvisor reports, a well drilled to the local median would run roughly $3,500 to $9,100 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 Tompkins 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.