A dormant well can quietly develop bacterial contamination — and there is no way to know without testing.
Memorial Day weekend marks the unofficial start of camp season across Maine and the Lakes Region of New Hampshire. Hundreds of thousands of seasonal properties sit quiet through the winter — and so do the private wells that supply them. What happens to that water during seven or eight months of disuse is something most camp owners do not think about until there is a problem.
Dormant wells can accumulate bacterial contamination from groundwater intrusion, deteriorating well casings, surface water incursion near the wellhead, or changes in pressure and flow that allow organisms to establish in the system. According to the Maine CDC, more than half of Maine homes rely on private wells for drinking water — and private well owners are entirely responsible for monitoring water safety on their own.
There is no regulatory body watching your camp well. That responsibility rests with you.
What Goes Wrong in a Seasonal Well
When a well sits unused, the conditions that normally suppress bacterial growth — regular draw, consistent pressure, dilution — are removed. A well that tested clean in October may tell a very different story by the time you arrive in late May.
The most common concerns in seasonal wells are total coliform bacteria and E. coli. Total coliform is a broad category that includes microorganisms naturally present in soil and surface water. Its presence in a well sample signals that surface contamination is reaching the water supply — a significant red flag. E. coli is more specific. When E. coli appears in a well sample, it indicates contamination from fecal matter, whether from wildlife, septic proximity, or another source. Neither is something you want to discover after a week of drinking the water.
Bacteria testing is not a complicated or expensive process. A simple sample — drawn properly from the tap before you flush the system — tells you what you need to know.
Why Spring Testing Matters More Than You Think
The period from snowmelt through early June is one of the higher-risk seasons for well contamination in Maine. Heavy spring rains and saturated soils push surface water closer to groundwater sources. Frost heave through the winter can shift well casings, open small cracks, or compromise seals around the wellhead. Nearby septic systems that have been absorbing winter snowmelt may be under pressure.
This is also peak real estate transaction season. A significant number of Maine camp and lakefront property sales close between April and July. Buyers who waive or delay water testing on a seasonal property are taking on an unknown. Sellers who have a clean, recent test result in hand move faster and avoid last-minute complications.
For home inspectors working lakefront, rural, or camp properties this time of year, a water test is among the most practical recommendations you can make. Total coliform, E. coli, and nitrates represent the baseline. Properties with older wells, nearby agriculture, or questioned well integrity may warrant a more comprehensive panel.
What to Test For When You Open Up
At minimum, every seasonal well in Maine and New Hampshire should be tested for:
- Total coliform bacteria — The broadest indicator of contamination pathway integrity. Any positive result warrants follow-up.
- E. coli — Presence indicates direct fecal contamination. Action is required.
- Nitrates — Commonly elevated in rural areas near agriculture, livestock, and aging septic systems. Particularly dangerous for infants and pregnant women, and undetectable without testing.
If your well has not been tested in several years, this is a reasonable opportunity to run a broader panel. Arsenic occurs naturally in Maine granite geology, and roughly one in ten Maine wells has been found to exceed acceptable levels. Radon in water is another Maine-specific concern worth addressing on older properties. These contaminants do not announce themselves through taste or odor — testing is the only way to know.
What Chanalytical Tests For
Chanalytical Laboratories tests for the full range of contaminants relevant to Maine and New Hampshire private well owners:
- Bacteria testing — Total coliform, E. coli, and heterotrophic plate count
- Nitrates and nitrites
- Arsenic and heavy metals
- PFAS screening — Detect/non-detect PFAS Check kit, with quantified EPA Method 533/537.1 confirmation testing arranged through the lab
- Radon in water
- Standard well panels — Physical, chemical, and biological parameters in a single submission
- FHA/VA compliance testing — For real estate transactions requiring documented water quality
Results are returned with clear reporting that is straightforward to read and share with clients, buyers, or treatment professionals.
For Home Inspectors
Spring camp and cottage season is exactly when your clients need a water testing recommendation most. If you are working seasonal or rural properties in Maine or New Hampshire, a coliform test is table stakes — and a broader panel positions you as the inspector who protected your client from a problem no one else flagged.
Chanalytical works directly with home inspectors throughout Maine and the Northeast. Consistent turnaround, documented results, and no ambiguity in reporting. When your deal depends on a water test coming back before closing, local matters.
For Water Treatment Companies
If you are installing or servicing treatment systems on seasonal properties this spring, post-installation testing belongs in your process. Baseline water quality before treatment and verification testing after give your clients documented confidence — and give you documented protection if anything is ever questioned.
Chanalytical supports water treatment companies with laboratory testing for verification, baseline assessment, and post-treatment confirmation across a full contaminant menu.
Ready to Test?
Whether you are opening a camp for the first time this season, closing on a lakefront property, or starting summer installations for your treatment business, testing starts with a simple sample.
Visit Chanalytical.com to learn more about what we test for, how to submit a sample, and how to read your results.
Maine-based. Practical turnaround. Water testing that works for how people actually live here.