A woman at a doctor’s office recently found out what I do for a living. Before I could say much else, she stopped me. “I wish I had known you when we bought our house,” she said. When they went to sell their home last year, the buyer’s water test came back with arsenic. Unfortunately, of the two types that can be present in well water, she had the one that is more expensive and difficult to remediate. The remediation cost them over $5,000. What makes it sting is that when they bought the home years earlier, they had done the minimum water test the bank required and moved on. A more comprehensive test at the time of purchase would have cost them roughly $100 more than what they paid.

This kind of story comes up more than you’d think.

The Bank’s Test Is Protecting the Bank More Than It’s Protecting You

The minimum water test most lenders require covers some basics, but it hasn’t been meaningfully updated in years. It satisfies a transaction requirement. It isn’t designed to give you a complete picture of what’s in your water, and it won’t catch a lot of things that can genuinely affect your health or the value of your home down the road.

What it typically misses: bacteria beyond the basics, heavy metals like arsenic and lead, minerals that affect water quality and appliances, certain anions like fluoride and chloride, radon, and if the property is near commercial activity, industrial sites, landfills, or a lake with motorboat traffic, volatile organic compounds (VOCs).

What Happens When Something Is Found

Here’s something worth understanding about how this plays out in real transactions. If a buyer upgrades to a more comprehensive test and something concerning turns up, the bank can’t unsee it. At that point the seller has a problem, because they know the same finding is likely to surface with the next buyer too, and in many states there are disclosure obligations that come into play. In nearly every case we see, it ends one of two ways: the seller knocks a quoted amount off the purchase price to cover the cost of an appropriate filtration system, or they install one before closing. Either way, the pressure lands squarely on the seller to make the water right.

What that means practically is that buyers who test thoroughly are in a much stronger position. And sellers who already know what’s in their water, and have addressed it, aren’t caught off guard.

What a Comprehensive Test Actually Costs

Spending an extra $100 to $200 beyond the bank minimum to include bacteria, heavy metals, minerals, nitrates, radon, and VOCs where relevant is one of the most cost-effective decisions you can make during a home purchase. Home inspectors who take the time to explain this to their clients find that almost all of them choose the more comprehensive option. Once it’s explained clearly, it’s not a hard sell. It’s just common sense.

You’re already spending hundreds of thousands of dollars on a home. The water test is not where you cut corners.

The Upside Nobody Talks About

Beyond the risk mitigation, there’s a genuine opportunity here. Testing thoroughly at the time of purchase means you can walk into your new home knowing exactly what’s coming out of your taps. If the water is clean, you have documentation and peace of mind. If it’s not, you have leverage and options before you’re already living there.

At ETR Laboratories, we work with home inspectors and buyers throughout the process. If you’re in the middle of a home purchase or planning one, a free consultation is a good place to start.

Contact us for a free consultation at 978-840-2941 or browse our water testing packages.