privatewelldata / States / Maine
Maine well water testing
44 labs are listed on Maine’s official certified-lab list; 59% of 261 sampled wells were above the arsenic limit across 14 counties. Updated 2026-10-18.
Official lab list for Maine
Maine CDC – laboratory accreditationMaine's public health agency publishes the labs accredited for drinking water, including commercial labs that take samples from homeowners.www.maine.gov · checked 2026-10-17 (browser)Maine Department of Health & Human ServicesThis state agency certifies the labs that may test drinking water. Use its list to pick a certified lab for your well sample.www.maine.gov · checked 2026-10-18 · link via EPA
Coverage map
Where the labs are
| Town | Labs |
|---|---|
| Manchester | 2 |
| Portland | 2 |
| Amherst | 1 |
| Auburn | 1 |
| Augusta | 1 |
| Cary | 1 |
| Charleston | 1 |
| Cinnaminson | 1 |
| Concord | 1 |
| Conroe | 1 |
| Cuyahoga Falls | 1 |
| Dayton | 1 |
| Derry | 1 |
| Earth City | 1 |
| East Boothbay | 1 |
| East Longmeadow | 1 |
| El Dorado Hills | 1 |
| Greensburg | 1 |
| Kelso | 1 |
| Kennebunk | 1 |
| Lancaster | 1 |
| Lee | 1 |
| Mansfield | 1 |
| Minneapolis | 1 |
| Mount Juliet | 1 |
| Newport | 1 |
| Norridgewock | 1 |
| North Kingstown | 1 |
| Norwell | 1 |
| Orlando | 1 |
| Ormond Beach | 1 |
| Pomona | 1 |
| Presque Isle | 1 |
| Rochester | 1 |
| Scarborough | 1 |
| South Bend | 1 |
| Tampa | 1 |
| West Sacramento | 1 |
| Westborough | 1 |
| Wilmington | 1 |
| Wiscasset | 1 |
| Ypsilanti | 1 |
No rows match these filters. Try fewer words or clear the filters.
Tests these labs are listed for
- Metals: 24 of 44 labs
- Nitrate / nitrite: 23 of 44 labs
- Lead: 22 of 44 labs
- PFAS: 22 of 44 labs
- Arsenic: 20 of 44 labs
- Bacteria (coliform / E. coli): 19 of 44 labs
- Organic chemicals / pesticides: 14 of 44 labs
- Radioactivity: 7 of 44 labs
Counted from the tests each lab is certified for on the official list. A lab may offer more; ask before you send a sample.
Well water results by county
| County | Arsenic > 10 µg/L | Nitrate > 10 mg/L |
|---|---|---|
| Androscoggin County | 46% of 13 | 3% of 34 |
| Aroostook County | – | 7% of 44 |
| Cumberland County | 46% of 48 | 3% of 112 |
| Franklin County | – | 0% of 30 |
| Hancock County | 48% of 33 | 0% of 61 |
| Kennebec County | 93% of 60 | 0% of 65 |
| Knox County | 100% of 13 | 0% of 14 |
| Oxford County | 15% of 13 | 3% of 139 |
| Penobscot County | – | 8% of 40 |
| Piscataquis County | – | 0% of 14 |
| Somerset County | 45% of 11 | 0% of 39 |
| Waldo County | – | 0% of 13 |
| Washington County | 33% of 39 | 0% of 51 |
| York County | 71% of 31 | 4% of 70 |
No rows match these filters. Try fewer words or clear the filters.
Nitrate: 2% of 726 sampled wells statewide. All Maine counties →
Labs on the Maine CDC list
- Eurofins Buffalo, AmherstListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins Auburn, AuburnListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Health and Environmental Testing Laboratory, AugustaListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins CEI, Inc., CaryListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- GEL Laboratories, LLC, CharlestonListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- EMSL Analytical, Inc., CinnaminsonListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins Concord, ConcordListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Nova Biologicals, Inc., ConroeListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Alliance Technical Group, LLC-Akron, Cuyahoga FallsListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- SGS North America Inc., DaytonListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins Derry, DerryListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins St. Louis, Earth CityListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Bigelow Laboratory for Ocean Sciences, East BoothbayListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Pace Analytical Services, LLC - East Longmeadow MA, East LongmeadowListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Onterris Laboratories, LLC, El Dorado HillsListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Pace Analytical Services, LLC - Greensburg, GreensburgListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- ALS Environmental, Kelso, KelsoListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Nelson Analytical Lab - Maine, KennebunkListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins Lancaster Laboratories Environment, LLC, LancasterListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Seacoast Analytical Services, LeeListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Nelson Analytical - Manchester, ManchesterListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Phoenix Environmental Laboratories, Inc., ManchesterListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Pace Analytical Services, LLC - Mansfield, MA (320 Forbes), MansfieldListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Pace Analytical Services, LLC - Minneapolis, MN, MinneapolisListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Pace Analytical National Center for Testing & Innovation, Mount JulietListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Acheron Inc. dba ClearWater Laboratory, NewportListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Maine Laboratories LLC, NorridgewockListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins Rhode Island, North KingstownListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Battelle Analytical Chemistry Services, NorwellListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- SGS North America, Inc. - Orlando, OrlandoListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Pace Analytical Services, LLC Ormond Beach FL, Ormond BeachListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins Pomona, PomonaListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins Portland ME, PortlandListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Nova Analytic Labs DBA Nova EnviroLabs, PortlandListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Mi'Kmaq Environmental Laboratory, Presque IsleListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- ALS Environmental - Rochester, RochesterListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Katahdin Analytical Services, ScarboroughListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins South Bend, South BendListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- KNL Environmental Testing, LLC, TampaListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Eurofins Sacramento, West SacramentoListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Pace Analytical Services, LLC - Westborough, MA, WestboroughListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- SGS North America Inc., WilmingtonListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- Maine Coast Lab dba Water Quality and Compliance Services, Inc., WiscassetListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
- National Testing Laboratories, Ltd., YpsilantiListed in Maine CDC’s certified lab list. See the official list → (checked 2026-10-17)
No rows match these filters. Try fewer words or clear the filters.
How to choose a lab
- Pick a lab on the official list above that is certified for each test you need (bacteria and chemistry are often separate certifications).
- Ask for the lab’s own sample bottles and instructions; bacteria samples usually must reach the lab within 24–30 hours.
- Compare prices for a basic package (bacteria, nitrate, pH/TDS) and add arsenic or other metals where local data shows a risk.
- Be wary of free in-home tests from treatment-system sellers — see our salesperson checklist.
Questions
Where can I get my well water tested in Maine?
Use a lab on Maine’s official certified-lab list. We count 44 listed labs (excluding those marked as serving public water systems only), most in Manchester, Portland, Amherst. Confirm the lab is certified for the exact tests you need before you send a sample.
What should I test my well for in Maine?
Test every year for bacteria (total coliform and E. coli), nitrate, pH and total dissolved solids (CDC). In Maine, 59% of sampled wells with arsenic data were above the EPA limit, so include arsenic. Use our test helper for a list that fits your home.
Is there well water data for my county in Maine?
Yes for 14 counties: we show the share of sampled wells above the EPA arsenic and nitrate limits, from the Water Quality Portal (USGS/EPA). These are monitoring wells as well as private wells, so test your own well.