Toxic Legacy in Calverton

Toxic Legacy in Calverton: How the Grumman Site Contamination Still Threatens Long Island’s Drinking Water

And what Custom Fabricated Filters is doing to fight back

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The quiet town of Calverton, nestled on eastern Long Island, is now a focal point of growing concern about drinking water safety. At the center of it all is the former Grumman Aerospace facility—a Cold War-era manufacturing site now infamous for its toxic legacy.

PFAS Found in Private Wells

Recent testing of private wells near the Grumman site has revealed alarmingly high levels of PFAS (per- and polyfluoroalkyl substances)—a class of man-made "forever chemicals" linked to cancer, hormone disruption, immune issues, and developmental problems. These substances don't break down in the environment and accumulate over time in both nature and the human body.

The source? Primarily firefighting foam used for decades during training exercises and aircraft maintenance. This foam leached into the ground, contaminating groundwater that local residents rely on for cooking, drinking, and bathing.

A Larger Environmental Threat

The contamination doesn't stop with PFAS. The area has also been flagged for volatile organic compounds (VOCs), heavy metals, and other industrial byproducts. The problem isn’t theoretical—it’s already in people’s homes. Families are being told their well water is no longer safe.

Unfortunately, this isn't an isolated case on Long Island. As our infrastructure ages and industrial pollution surfaces, many communities are left exposed without clear long-term solutions.

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How Custom Fabricated Filters Is Responding

At Custom Fabricated Filters, we’ve built our systems to handle the exact type of crisis unfolding in Calverton.

Our Alpha Series Whole House Systems are engineered from 100% stainless steel, designed to deliver robust protection at the point where water enters your home. With multi-stage sediment filtration and advanced carbon media—including catalytic options designed for PFAS and VOC reduction—our systems work around the clock to neutralize what water tests can’t always predict.

For added protection at the tap, our Alpha Mini undersink systems provide a final barrier where it matters most: your drinking water.

Both solutions are hand-built in the U.S. and tailored for environments just like Long Island—where groundwater is vulnerable and safety can’t be left to chance.

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Don’t Wait for the Next Headline

The Grumman site in Calverton is a wake-up call. Water contamination isn’t just a future risk—it’s already happening. Whether you’re on a private well or city water, proactive filtration is no longer optional. It's essential.

If you live on Long Island and want to take control of your water quality, we’re here to help. Contact Custom Fabricated Filters to learn how our Alpha Series systems can protect your family from PFAS, firefighting foam residue, and more.

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Real filtration. For real contamination.

Custom Fabricated Filters – Built to defend your water.