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Our arsenic water test measures the total arsenic in your drinking water. Arsenic has no color, smell, or taste, so our lab result is the only way to know it is there. Private well owners, home buyers, and families with young children or a pregnancy in the house order it most often.
Arsenic levels in a well can drift over the years, so a clean result from a decade ago may not describe your water today. A current lab number gives you a fresh baseline. It also shows if treatment deserves a closer look before your family keeps drinking the water.
Arsenic is a natural element in bedrock that can dissolve into groundwater as water moves through the rock. The U.S. Geological Survey estimates that about 2.1 million Americans drink from wells above the federal standard.
Here are the usual sources of arsenic in well water:
Arsenic has no taste, color, or smell, so long-term exposure can build up without any warning. Private wells fall outside federal rules, and the EPA private well guidance leaves testing up to the owner.
An arsenic water test is a good fit if you drink from a private well, especially in a region where arsenic-bearing rock is common. The reason to test usually comes from where you live rather than anything you notice in the glass.
It also makes sense when you are buying a home with a well, when someone in the house is pregnant, or when young children drink the water every day. Children drink more water for their body weight than adults, so the same level means a larger dose for them.
If you already have an arsenic filter, a yearly test of the treated water shows if it is still doing its job.
Orders of $100 or more ship free, and orders under $100 ship for an $8 flat rate. Every kit comes with a prepaid return label, so sending your sample back costs nothing extra.
Arsenic samples are stable, but we suggest you collect and ship as soon as possible after sampling.
We analyze your sample in our accredited lab, using established testing methods and quality controls.
We have tested water since 1995.
Every test includes a free consultation with one of our water experts. We go over your results with you, explain what the numbers mean for your home, and help you decide on the appropriate next step, including any filtration approach.

Ships free to your door

Takes under 5 minutes

Free return shipping

Expert Consultation

Ships free to your door

Takes under 5 minutes

Free return shipping

Expert Consultation
Every test comes with step-by-step instructions on how to prepare your water source, collect your water sample, and prepare your sample for return shipment to our lab.
The appropriate sample containers are provided with sterility and sample volume requirements taken into consideration.
A short form to fill out with basic information about your water source. This helps our lab technicians process your results accurately.
A pre-paid return shipping label is included — just drop the sealed package in any mailbox or hand it to your mail carrier. No extra cost.
“The test was simple—collect a water sample from a faucet in the home. We sent the test to the lab and received a water quality analysis within a few days. The test included analysis of the water sample for the presence of: coliform bacteria, E. coli, iron, lead, pH, turbidity, and nitrates/nitrites.”
Taylor L.
“Incredible lab, they really care about their customers. As someone who doesn’t know a whole lot about water quality, they took their time to help me understand everything about my water quality situation.”
Brad R.
“I’ve used ETR for several tests, both water and air. The test kits are easy to understand and the reports are very comprehensive. But what really makes them stand out is their quality of service. There is a lot of terminology in these reports that I don’t understand, but their staff is very knowledgeable and always available to assist. They really take their time to review the results with you on the phone, and answer any questions you may have.”
John T.
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nationwide since 1995
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verified homeowner reviews
We run every test inside our own lab in Leominster, Massachusetts. Your results come straight from us, not a subcontractor. That keeps our pricing fair and our quality consistent across every kit we send out.
Most labs stop at handing you a report. We do not. Every result comes with a free call to one of our water quality experts, so you understand what your numbers mean and what to do next.
ETR Laboratories has run water tests for over 30 years. We hold membership in the national Water Quality Association and the Massachusetts Ground Water Association.
Our reviews reflect the work we do. We hold a 4.8 out of 5 rating on Google, a 4.8 out of 5 rating on Angi from 342 reviews, and five-star ratings on Trustpilot.

Our Premium Water Test screens your water for 113 substances in one round, including bacteria, radon, heavy metals, and industrial chemicals, providing homeowners and landlords with a thorough assessment for peace of mind. We have run…
Yes, over time it can be. Long-term exposure to arsenic in drinking water is linked to skin, bladder, and lung cancer, as well as heart disease and diabetes. The risk tends to rise with both the level and the number of years you drink it. Children may face more risk, because they drink more water for their size. A measured result tells you if your well needs attention.
The EPA limit for public water is 10 parts per billion, and the EPA health goal is zero. Private wells are not covered by the rule, so well owners use the 10 ppb number as their guide. Some states set a lower line, and many health experts suggest treating at lower levels when children drink the water. Any detectable result is worth talking through with us.
Yes. Some home treatment systems can lower arsenic a great deal when they are sized and maintained correctly. Arsenic III and arsenic V behave differently, so the right setup depends on your water, and our free consultation helps you decide on the appropriate filtration approach. A test of the water after the filter is the only way to confirm the system is working at your home.
No. Boiling does not remove arsenic, and our arsenic water test is the only way to know your level. As water evaporates, the arsenic stays behind, so boiling can slightly raise the level in what is left in the pot. If your result is high, bottled water for drinking and cooking is a reasonable short-term step while you look into a treatment system.
Many state health departments suggest testing a new well and then retesting every few years, since groundwater levels can shift. If you already treat for arsenic, a yearly test is a sensible habit, because filter media wears out without any change you can see or taste. A retest also makes sense after any major well work.
In most cases, yes. Arsenic is not readily absorbed through the skin, so the main concern is water you swallow. Showering, bathing, and washing dishes are generally considered low risk at the levels found in wells. If your result is very high, our team or your local health department can talk through your number with you.
Many well owners pair it with a broader metals test and a bacteria test. Bedrock that releases arsenic may also release other natural metals, such as uranium or manganese, so a metals panel gives a wider view of the same water. A bacteria and nitrate check shows if surface water is getting into the well, which a metals result cannot tell you. Our team can help you pick a mix that fits your well on a free call.
It is less likely. Public water systems must keep arsenic under the EPA limit of 10 parts per billion and test on a set schedule. Your utility's yearly water quality report lists its arsenic results. Those results describe the system as a whole, and private wells have no such oversight at all. City customers who want their own number can test at the tap, but well owners have the stronger reason to test.
No shared results. Our laboratory holds our clients privacy to the highest regard, your results and information will never be shared. Be aware that state certified laboratories may be required to report your results to various government agencies.