Maine’s groundwater is still running below normal — and low water tables don’t just make wells run dry, they change what’s dissolved in the water that’s left.
Maine has been running a precipitation deficit since the 2025 water year began, and groundwater levels across much of the state are still below normal heading into late summer 2026. During the 2025 drought season, 551 dry wells were reported statewide — a sharp jump over prior years. Parts of southern Maine have sat in extreme drought as recently as this spring.
Most of the coverage has focused on wells going dry. That’s the visible problem. The less visible one is what happens to water chemistry in a well that hasn’t gone dry but is drawing from a depleted aquifer — and why a water test from two years ago may no longer describe what’s coming out of the tap today.
Why Drought Changes Well Water Chemistry
Two things happen when the water table drops.
Concentration. Contaminants already present in groundwater get diluted by less water. The same mass of arsenic, uranium, nitrate, or manganese spread through a smaller volume of water reads higher at the tap. This is straightforward arithmetic, and it applies to naturally occurring contaminants and to anything reaching the aquifer from a septic system, a barn, or a fertilized field.
Chemistry. Drawdown pulls water from different parts of the bedrock than a well normally draws from, and it changes the oxygen conditions down the borehole. Both affect how readily metals leach out of the rock. A U.S. Geological Survey study conducted with the CDC found that the population exposed to elevated arsenic from domestic wells nationally rises from roughly 2.7 million to 4.1 million people during drought — and that the probability of exceeding the 10 µg/L standard climbs the longer the drought runs. Maine’s arsenic-bearing bedrock makes this more than a theoretical concern here.
Sediment is the third piece. As the water level approaches the pump intake, wells start pulling fine material that was never in suspension before. Cloudy water, grit in the aerators, and a change in taste or odor are all common late-drought complaints — and they are also signs your treatment equipment is now handling something it wasn’t sized for.
What Maine Homeowners Should Do This Summer
The practical answer is that drought resets the clock on your last water test. If your most recent results predate the current dry stretch, they describe an aquifer that no longer exists in the same condition.
- Retest if your last panel is more than a year old — and especially if it was taken in a wet spring. Spring and late-summer results from the same well can look like they came from two different sources.
- Watch for the warning signs: sputtering faucets, air in the lines, discolored or gritty water, dropping pressure, or a change in taste or smell. Any of these means the well is under stress.
- Test the full picture, not one analyte. Arsenic, uranium, nitrate, and bacteria all respond to drawdown differently. A single-parameter test tells you about one risk and nothing about the others.
- If your well ran dry and recovered, or if it was serviced, deepened, or hydrofractured, test for bacteria before drinking it. Anything that opens the system is an entry point for total coliform and E. coli.
- Selling or buying? Lenders and buyers work from current results. A stale panel from a wetter year is a weak document in a transaction, and a surprise on a re-test late in the process is an expensive delay.
What Chanalytical Tests For
Our panels are built around the contaminants that actually show up in Maine bedrock wells. The FHA/VA Basic Safety Test covers the analytes lenders require for a closing. Our standard well panels run through metals, nitrate and nitrite, and bacteria — total coliform and E. coli. The 20-analyte Comprehensive panel adds the wider metals picture including arsenic, uranium, lead, manganese, and hardness. Radon in water and PFAS panels, including PFOA and PFOS, are available alongside any panel or on their own.
Results arrive as a plain-English PDF you can hand to a lender, a buyer, or a treatment contractor without translation.
For Home Inspectors
Drought conditions make water testing a harder conversation on site and a more valuable one. A well that produced fine in 2023 may show reduced yield, sediment, or elevated metals today, and buyers increasingly ask about it. Working with a Maine lab means samples don’t spend two days in transit before analysis — most panels are reported the next business day, which keeps a water result from becoming the item that pushes a closing. We handle collection logistics, sample bottles, and report delivery so the testing piece stays off your critical path.
For Water Treatment Companies
Drought is the condition most likely to push an installed system out of spec. A softener, arsenic media bed, or reverse osmosis unit sized against pre-drought influent chemistry may be undersized against today’s concentrations, and increased sediment shortens media life and fouls prefilters ahead of schedule. Independent verification testing protects the installation and the relationship: a baseline before design, a post-installation panel confirming performance, and periodic pre- and post-treatment sampling that demonstrates the system is still doing what it was sold to do. When the verification comes from a lab with no stake in the equipment, the result carries more weight with the customer.
Why Trust Chanalytical
Chanalytical is an independent water testing laboratory in Gorham, staffed by Maine scientists who work with these wells and these contaminants every day. Because we sell analysis and not treatment equipment, our results are third-party and objective — we have no stake in what you do with them. Samples are processed here in Maine, with most panels reported the next business day, and results come back as a clear PDF rather than a page of raw numbers. If you have a question about a result, a person answers the phone at (207) 747-1815.
Get Your Well Tested
If your last water test came from a wetter year, it is out of date. Chanalytical offers nine drop-off locations across Maine — Gorham, Scarborough, Steep Falls, New Gloucester, Auburn, Augusta, and Hermon — with fast local turnaround and panels built for Maine wells. Home inspectors and water treatment companies: ask us about partner accounts, bulk sample kits, and reporting built for your workflow.
Visit chanalytical.com or call (207) 747-1815 to schedule testing or arrange a drop-off.
Not sure which test fits your situation? The free 60-second Well Check narrows it down in a minute, and kits can be ordered online for shipping or pickup at any of the nine drop-off locations across Maine.