Well water in Brownfield, Maine
In Brownfield, 11% of 37 private wells tested had fluoride above the Maine guideline (2 mg/L), according to Maine CDC.
37 private wells tested in state summaries; 6 individual samples from 6 wells, 1977 to 2022. Data refreshed September 3, 2026.
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.
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What this means
Among homeowners in Brownfield who sent a sample to the state lab, the health-based limits most often exceeded were uranium (16% of 25 wells), fluoride (11% of 37 wells), and arsenic (4% of 28 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 Brownfield
- PFAS1 unlined landfill on record locally.
- Volatile organic compounds (VOCs)1 unlined landfill on record locally.
- Metals panel1 hazardous waste site on record locally.
- Uranium16% of 25 local wells tested were above the Maine guideline.
- Fluoride11% of 37 local wells tested were above the Maine guideline.
- Arsenic4% of 28 local wells tested were above the Maine guideline.
- Coliform bacteriaRecommended for every private well, every year.
- NitrateRecommended for every private well, especially near farms or septic systems.
- ChlorideDetected in 67% of local samples.
Wells in Brownfield
194 domestic wells in Brownfield are on record with the state since 1986. 99% are drilled into bedrock, and the typical well is 393 feet deep (one in ten goes past 600 feet).
In a typical Brownfield well, bedrock starts about 30 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.
Contamination sources on record in Brownfield
Maine DEP records 1 unlined landfill and 1 hazardous waste site in Brownfield, 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.
- 1
- hazardous waste siteSolvents, degreasers and metals from industrial sites can travel far in fractured bedrock.
- 2
- other remediation projects
Treatment that fits the local profile
- Uranium
- Point-of-use reverse osmosis; Anion exchange; Whole-house anion exchange
- Fluoride
- Point-of-use reverse osmosis; Activated alumina; Distillation
- Chloride
- Point-of-use reverse osmosis; Distillation
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Common questions
How deep are wells in Brownfield?
The typical domestic well in Brownfield is 393 feet deep, based on 194 wells reported to the state since 1986. One in ten is deeper than 600 feet. 99% are drilled into bedrock.
How often should I test a private well in Brownfield?
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
- Maine DEP PFAS investigation: 24 samples in Brownfield. PFAS results for private wells sampled by the Maine Department of Environmental Protection. Retrieved September 3, 2026.
- USGS Water Quality Portal: 6 samples in Brownfield. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
- Maine Tracking Network private well summaries: summaries for 6 contaminants in Brownfield, up to 37 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: 198 well records in Brownfield, 194 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 Brownfield. 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.