Well water in Groton, Vermont
In Groton, 2% of 52 private wells tested had uranium above the Vermont limit (20 ug/L), according to the Vermont Department of Health.
64 private wells tested in state summaries. Data refreshed .
What homeowner tests found
Vermont Tracking private well summaries: private wells tested and reported to the state. Shares are against the level the state applies to each contaminant, named in the last column; several are stricter than EPA.
| Contaminant | Wells tested | Above state level | Median | 95th pct | Highest | State level | |
|---|---|---|---|---|---|---|---|
| Radon | 26 | 27% | 2,480 | 9623 | 21,800 | 4,000 pCi/L | |
| Gross alpha Gross Alpha | 33 | 9% | 3.3 | 16.3 | 24.1 | 15 pCi/L | |
| Uranium | 52 | 2% | 2 | 18 | 45 | 20 ug/L | |
| Nitrate | 61 | 2% | 0.25 | 2.26 | 11 | 10 mg/L | |
| Fluoride | 64 | 0% | 0.15 | 0.626 | 1.22 | 4 mg/L | |
| Arsenic | 62 | 0% | * | * | 10 ug/L |
* suppressed by the publisher because too few wells were tested.
Get the free Groton well report
One email with the numbers above, what they mean for a home in Groton, exactly which tests to order, and what treatment fits the local profile. No spam, unsubscribe in one click.
What this means
Among homeowners in Groton who sent a sample to the state lab, the health-based limits most often exceeded were uranium (2% of 52 wells) and nitrate (2% of 61 wells). These are ordinary wells tested by their owners, so the shares are the best available picture of a typical well here, with one caveat: people test more often when they suspect a problem.
Radon was above the Vermont advisory level of 4,000 pCi/L in 27% of 26 wells. Radon in water matters because it moves into indoor air during showers and laundry.
What to test for in Groton
- Volatile organic compounds (VOCs)4 leaking underground storage tank sites on record locally.
- Radon27% of 26 local wells tested were above the Vermont advisory level.
- Gross alpha9% of 33 local wells tested were above the Vermont limit.
- Uranium2% of 52 local wells tested were above the Vermont limit.
- Nitrate2% of 61 local wells tested were above the Vermont limit.
- Coliform bacteriaRecommended for every private well, every year.
Wells in Groton
167 domestic wells in Groton are on record with the state since 1996. 100% are drilled into bedrock, and the typical well is 300 feet deep (one in ten goes past 500 feet).
In a typical Groton well, bedrock starts about 20 feet down, the median yield is 10 gallons per minute, 19% of wells yield under 3 gallons per minute and usually need a storage tank.
Bedrock wells are where arsenic, uranium and radon come from: the water sits in fractures in granite and metamorphic rock and picks up whatever the rock carries. That is why testing for those three matters more here than in a dug or gravel well.
Contamination sources on record in Groton
Vermont ANR records 4 leaking underground storage tank sites in Groton, among 6 regulated sites in total. Groundwater does not follow property lines, so a well within a few hundred feet of one of these is worth testing for what that site could release.
- 4
- leaking underground storage tank sitesGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
- 2
- registered underground storage tank sitesRegistered tanks are regulated and inspected; they matter most when they are old or near a shallow well.
Treatment that fits the local profile
- Radon
- Aeration (bubble-up or diffused) whole-house; Granular activated carbon whole-house (lower levels only)
- Gross alpha
- Point-of-use reverse osmosis; Water softener (cation exchange) for radium; Anion exchange for uranium
Book a free water test in Groton
A licensed local water treatment company tests your tap water in your home, walks you through the numbers, and quotes treatment only if something needs fixing. Free, about 30 minutes, no obligation.
Common questions
How deep are wells in Groton?
The typical domestic well in Groton is 300 feet deep, based on 167 wells reported to the state since 1996. One in ten is deeper than 500 feet. 100% are drilled into bedrock.
How often should I test a private well in Groton?
Test for bacteria and nitrate every year. Test once for arsenic, uranium, radon, fluoride, manganese and PFAS, then again every three to five years or after any change in taste, color, or plumbing.
Sources
- Vermont Tracking private well summaries: summaries for 6 contaminants in Groton, up to 64 wells each. Town summaries of private well tests reported to the Vermont Department of Health, published through Vermont Environmental Public Health Tracking. Shares are against the limit Vermont applies to each analyte: arsenic 10 ug/L, uranium 20 ug/L (stricter than EPA), fluoride 4 mg/L, nitrate 10 mg/L, gross alpha 15 pCi/L, radon 4,000 pCi/L advisory. Only towns with 20 or more results are published; statistics below the reporting limit show as *. Retrieved September 3, 2026.
- Vermont ANR well completion reports: 175 well records in Groton, 167 domestic. Well completion reports filed with the Vermont Agency of Natural Resources since 1966. Only aggregates are shown; owner names and addresses are never stored. Retrieved September 3, 2026.
- Vermont ANR regulated sites: 6 regulated sites located in Groton. Hazardous waste sites, landfills and underground storage tanks from the Vermont Agency of Natural Resources. Retrieved September 3, 2026.
Non-detects count as samples and are treated as zero when computing medians. Exactly at the limit counts as not above it. A sample belongs to the town containing the well's reported coordinates.