Well water in Lyndon, Vermont
In Lyndon, 2% of 85 private wells tested had arsenic above the Vermont limit (10 ug/L), according to the Vermont Department of Health.
85 private wells tested in state summaries; 26 individual samples from 6 wells, 1992 to 2017. Data refreshed September 3, 2026.
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 | |
|---|---|---|---|---|---|---|---|
| Arsenic | 85 | 2% | * | * | 18 | 10 ug/L | |
| Nitrate | 62 | 2% | 0.25 | 3.07 | 12.2 | 10 mg/L | |
| Fluoride | 77 | 0% | 0.13 | 0.826 | 3.6 | 4 mg/L | |
| Uranium | 67 | 0% | 1 | 4 | 16 | 20 ug/L | |
| Gross alpha Gross Alpha | 36 | 0% | 2.5 | 6.1 | 7.9 | 15 pCi/L | |
| Radon | 25 | 0% | 432 | 1,822 | 2,200 | 4,000 pCi/L |
* suppressed by the publisher because too few wells were tested.
What individual samples found
Each row summarizes every public sample for that contaminant inside Lyndon. Above limit means above the EPA maximum contaminant level; where EPA has no enforceable limit, the row shows a health guideline or nuisance level instead.
| Contaminant | Samples | Detected | Above limit | Median | Highest | Limit | |
|---|---|---|---|---|---|---|---|
| Nitrate 1992 to 2017 | 26 | 38% | 0% | 0 | 0.841 | 10 mg/L EPA limit | |
| Fluoride 1992 to 2017 | 13 | 23% | 0% | 0 | 0.07 | 4 mg/L EPA limit | |
| Iron 1992 to 2017 | 13 | 92% | no limit | 187 | 557 | 300 ug/L nuisance level | |
| Chloride 1992 to 2017 | 13 | 100% | no limit | 1.06 | 70 | 250 mg/L nuisance level | |
| Sodium 1992 to 2017 | 13 | 100% | no limit | 1.31 | 50 | 20 mg/L health guideline | |
| Manganese 1992 to 2017 | 13 | 92% | no limit | 10.3 | 130 | 300 ug/L health guideline |
Sampled fewer than 10 times, too few to summarize: Uranium (6), Arsenic (6), Lead (6), Copper (6), Radium (226 + 228) (4), E. coli (2), Radon (3).
Get the free Lyndon well report
One email with the numbers above, what they mean for a home in Lyndon, exactly which tests to order, and what treatment fits the local profile. No spam, unsubscribe in one click.
What this means
Among homeowners in Lyndon who sent a sample to the state lab, the health-based limits most often exceeded were arsenic (2% of 85 wells) and nitrate (2% of 62 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.
What to test for in Lyndon
- Volatile organic compounds (VOCs)33 leaking underground storage tank sites on record locally.
- PFAS2 unlined landfills on record locally.
- Metals panel13 hazardous waste sites on record locally.
- Arsenic2% of 85 local wells tested were above the Vermont limit.
- Nitrate2% of 62 local wells tested were above the Vermont limit.
- Coliform bacteriaRecommended for every private well, every year.
- RadonMedian local reading is 750 pCi/L.
- ChlorideDetected in 100% of local samples.
- IronDetected in 92% of local samples.
- ManganeseDetected in 92% of local samples.
Wells in Lyndon
327 domestic wells in Lyndon are on record with the state since 1996. 99% are drilled into bedrock, and the typical well is 300 feet deep (one in ten goes past 504 feet).
In a typical Lyndon well, bedrock starts about 18 feet down, the median yield is 8 gallons per minute, 24% 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 Lyndon
Vermont ANR records 33 leaking underground storage tank sites, 2 unlined landfills, 13 hazardous waste sites, and 2 reported spills and releases in Lyndon, among 82 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.
- 33
- leaking underground storage tank sitesGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
- 2
- unlined landfillsOlder unlined landfills are a leading source of PFAS, VOCs and metals in nearby wells.
- 13
- hazardous waste sitesSolvents, degreasers and metals from industrial sites can travel far in fractured bedrock.
- 2
- reported spills and releasesMost spills are fuel; a few are solvents or chemicals that reach the water table.
- 32
- 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
- Iron
- Oxidizing filter whole-house; Water softener (low levels); Aeration plus filtration
- Chloride
- Point-of-use reverse osmosis; Distillation
- Manganese
- Oxidizing filter (greensand, birm) whole-house; Water softener (low levels); Point-of-use reverse osmosis
Book a free water test in Lyndon
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 Lyndon?
The typical domestic well in Lyndon is 300 feet deep, based on 327 wells reported to the state since 1996. One in ten is deeper than 504 feet. 99% are drilled into bedrock.
Is there arsenic in well water in Lyndon?
Arsenic was detected in 17% of 6 public well samples in Lyndon, and 0% were above the EPA limit of 10 ug/L. Arsenic has no taste or smell; a lab test is the only way to know your level.
How high is radon in well water in Lyndon?
The median radon level across 3 public samples in Lyndon was 750 pCi/L, with a high of 1,500 pCi/L. New Hampshire recommends treatment above 2,000 pCi/L.
How often should I test a private well in Lyndon?
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
- USGS Water Quality Portal: 124 samples in Lyndon. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
- Vermont Tracking private well summaries: summaries for 6 contaminants in Lyndon, up to 85 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: 343 well records in Lyndon, 327 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: 82 regulated sites located in Lyndon. 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.