Well water in Woolwich, Maine
In Woolwich, 2% of 175 private wells tested had arsenic above the Maine guideline (10 ug/L), according to Maine CDC.
197 private wells tested in state summaries; 4 test results across 4 contaminants from at least 1 wells, 2024; PFOA has the most at 1. Data refreshed September 3, 2026.
Compiled by Nick at Well Water Nerd from public records. How these pages are built
Maine DEP samples private wells near fields where sludge or septage was spread and near other known PFAS sources, and resamples detections. PFAS shares describe wells that were tested for a reason, not every well in the area.
What homeowner tests found
Maine Tracking Network 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.
Closer than the town
See the sampled wells near your address
The same records, drawn around one point: which wells within a few miles were sampled and what they found, how deep the wells next to you were drilled, and any leaking tank or cleanup site within a mile.
Check my addressWhat this means
Among homeowners in Woolwich who sent a sample to the state lab, the health-based limits most often exceeded were arsenic (2% of 175 wells), uranium (<1% of 136 wells), and fluoride (<1% of 197 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 Woolwich
- 1Arsenic2% of 175 local wells tested were above the Maine guideline.
- 2Uranium<1% of 136 local wells tested were above the Maine guideline.
- 3Fluoride<1% of 197 local wells tested were above the Maine guideline.
- 4Coliform bacteriaRecommended for every private well, every year.
- 5NitrateRecommended for every private well, especially near farms or septic systems.
- 6Manganese2% of 159 local wells tested were above the Maine guideline.
- 7PFAS1 unlined landfill on record locally.
- 8Volatile organic compounds (VOCs)1 unlined landfill on record locally.
- 9Metals panel2 hazardous waste sites on record locally.
Test your Woolwich well for arsenic, uranium and fluoride
Certified lab analysis of your own tap water, bottles and prepaid return shipping included. The Essential well panel covers arsenic, uranium, nitrate, lead, copper, manganese, iron, sodium and bacteria; radon and PFAS are add-ons.
Order the Tap Score well water test kit, from $209Already tested? Upload the report
Just want bacteria checked first? Tap Score coliform and E. coli test, $99. Coliform and E. coli are the tests every well needs every year.
Want a quick look before paying for a lab? Home well water test strips on Amazon check hardness, iron, pH and nitrate in minutes. They are a screen, not a result: arsenic, bacteria, uranium and PFAS need a certified lab.
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Where to get a well tested in Maine: certified labs, state programs and prices.
Already have results back? Get your lab report read against the Woolwich numbers, $29. Every line explained, ranked by what matters, with the fix for each.
Wells in Woolwich
461 domestic wells in Woolwich are on record with the state since 1970. 96% are drilled into bedrock, and the typical well is 230 feet deep (one in ten goes past 410 feet).
In a typical Woolwich well, bedrock starts about 8 feet down, the median yield is 5 gallons per minute, 27% 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.
The rock under Woolwich
Not a principal aquifer
The USGS map places this area outside any principal aquifer, which usually means wells here draw from fractured bedrock or thin local deposits rather than a large regional aquifer. Bedrock wells of that kind are where arsenic, radon and uranium turn up, and yields vary from well to well.
Classification from the USGS Principal Aquifers of the United States (national map, 2003 edition, GIS release 2015), read at the town centroid. A single well can sit in a different unit, especially near a boundary.
Official help in Maine
Two places to start that are not selling anything: the state program that answers private well questions, and its list of labs certified to run drinking water tests. A certified lab is the difference between a result you can act on and a number.
- Private Well Water, Maine CDC
- Laboratory Accreditation, Maine CDC
Contamination sources on record in Woolwich
Maine DEP records 1 unlined landfill and 2 hazardous waste sites in Woolwich, among 4 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.
- 1
- unlined landfillOlder unlined landfills are a leading source of PFAS, VOCs and metals in nearby wells.
- 2
- hazardous waste sitesSolvents, degreasers and metals from industrial sites can travel far in fractured bedrock.
- 1
- other remediation project
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Get on the list for a free in-home water test in Woolwich
No water treatment company serves Woolwich through Well Water Nerd yet. We are signing licensed companies on county by county: they test at your tap for free, walk you through the numbers, and quote treatment only if something needs fixing. Leave your details and you are first in line. Nothing is shared until a company joins for Woolwich, and you get an email naming it first.
Common questions
How deep are wells in Woolwich?
The typical domestic well in Woolwich is 230 feet deep, based on 461 wells reported to the state since 1970. One in ten is deeper than 410 feet. 96% are drilled into bedrock.
How often should I test a private well in Woolwich?
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.
Towns near Woolwich
Closest first. Groundwater does not stop at a line on a map, so the next town over is a fair second opinion.
Want the numbers themselves? Download the Maine dataset as CSV, every county and town, with the sources named.
Sources
- Maine DEP PFAS investigation: 4 samples in Woolwich. PFAS results for private wells sampled by the Maine Department of Environmental Protection. Retrieved September 3, 2026.
- Maine Tracking Network private well summaries: summaries for 6 contaminants in Woolwich, up to 197 wells each. Town summaries of private well tests run by the Maine Health and Environmental Testing Laboratory, published by Maine CDC through the Maine Tracking Network. Shares are against Maine's guideline for each analyte (arsenic 10 ug/L, uranium 30 ug/L, fluoride 2 mg/L, manganese 0.3 mg/L, nitrate 10 mg/L, nitrite 1 mg/L). Towns with too few tests are suppressed (NR). Only the share above the guideline and wells tested are published; no medians. Retrieved September 3, 2026.
- Maine Geological Survey well database: 477 well records in Woolwich, 461 domestic. Well construction records reported to the Maine Geological Survey by licensed well drillers. Only aggregates are shown; owner names and addresses are never stored. Retrieved September 3, 2026.
- Maine DEP regulated sites: 4 regulated sites located in Woolwich. Remediation sites, leaking underground storage tanks and closed municipal landfills from the Maine Department of Environmental Protection. 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.