TCE Exposure and Cancer: Why Groundwater and Workplace Claims Differ

If you have kidney cancer, liver cancer, or non-Hodgkin lymphoma and you know trichloroethylene (TCE) was part of your past, the first question a lawyer will ask is where the exposure happened.

Was it in the water at home, or in vapor rising into your basement from contaminated groundwater? Or was it at work, at a degreasing tank or a parts washer you stood over for years?

The chemical is the same either way. The lawsuit is not. The path TCE took to reach you decides who can be sued, which legal claims are available, what has to be proven, and how the deadlines work.

What the Science Says About TCE and Cancer

TCE is a solvent used for decades to strip grease from metal parts, and it also turned up in paint strippers, adhesives, and spot removers. The EPA's IRIS assessment classifies it as carcinogenic to humans by all routes of exposure, which means breathing it and drinking it both count.

The New York State Department of Health's TCE fact sheet explains that the strongest human evidence is for kidney cancer, drawn largely from studies of workers who degreased metal parts.

The evidence for non-Hodgkin lymphoma and liver cancer is real but more limited. TCE's legal status has also changed.

New York already prohibits using TCE as a vapor degreaser or in any other manufacturing or industrial cleaning process. In December 2024, the EPA followed with a rule banning most uses of TCE nationwide.

Most of that ban has taken effect, while a handful of industrial uses are being phased out more slowly and parts of the rule remain in litigation. None of this undoes past exposure, which is what nearly every cancer claim involves, and none of it cleans up contamination already in the ground.

How TCE Reaches People Through Groundwater

TCE is denser than water. When it was spilled, dumped, or leaked from storage, it did not stay on the surface. It sank through the soil into the aquifer, where it can linger and spread for decades.

On Long Island, the state's map of the Navy Grumman plume in Bethpage shows contamination stretching about 4.3 miles from the old aircraft plants and reaching roughly 900 feet underground.

From the aquifer, TCE reaches people in more than one way. Some drink it in well or municipal water, and some breathe it when it evaporates from the shower or the stove. The pathway that catches many families off guard is soil vapor intrusion.

TCE evaporates from the groundwater, travels up through the soil, and enters a building through cracks in the foundation. A household can be breathing it without ever drinking a drop of contaminated water, and a home on clean, treated water can still have a vapor problem.

That is why a plume under your neighborhood does not, by itself, prove what you were exposed to. A reading from a monitoring well, a reading from a utility's untreated supply well, and a reading from your kitchen tap are three different measurements.

The federal drinking water limit for TCE is 5 parts per billion, but it applies to what public water systems deliver, not to every sample drawn from the ground. Indoor air has its own benchmark.

The Department of Health recommends that TCE stay at or below 2 micrograms per cubic meter of indoor air and calls for immediate action at 20 or higher.

Because a plume spreads underground, one old factory or dry cleaner can affect an entire neighborhood. That is why groundwater cases often involve many households rather than one.

How Workplace Exposure Differs

At work, TCE usually skipped the groundwater step entirely. It was used as a liquid in vapor degreasers, parts washers, and spray cleaning, and it evaporated right where people stood. Workers breathed it and absorbed it through their skin at the bench.

The NYSDOH fact sheet cites research putting average U.S. workplace air levels from the 1950s through the 1980s at around 210,000 micrograms per cubic meter, roughly 100,000 times the state's guideline for indoor air.

The legal limit offered little protection. OSHA's exposure limit for TCE is still 100 parts per million, a figure drawn from a 1967 consensus standard. defendant points to OSHA compliance, that does not settle whether the exposure was safe.

The line between the two pathways is not always clean. Someone who worked in an office sitting above a plume could breathe TCE vapor on the job even though the employer never bought a drop of it.

In that situation, the place of exposure is a workplace, but the source is groundwater contamination from someone else's property, and the claim may look more like a groundwater case.

Who Can Be Sued, Depending on the Pathway

In a groundwater case, the people who caused the exposure are usually strangers to you. Possible defendants include the company that owned or operated the site where the TCE was released, later owners that took on the earlier owner's liabilities, and companies that hauled or disposed of the waste.

A water supplier or municipality that failed to test or warn can sometimes be named too, though claims against public entities require a notice of claim, generally within 90 days.

These personal injury claims are brought under New York law, most often for negligence. The federal Superfund law often shapes the cleanup and produces years of testing data, but it does not compensate people for illness.

Property claims such as trespass and nuisance are available in some situations, though, as the next section shows, New York courts have drawn tight lines around them.

	Groundwater or vapor intrusion	Workplace
Usual defendants	Site owners and operators, successor companies, waste haulers	TCE manufacturers and suppliers, equipment makers, facility owners
Key experts	Hydrogeologists and environmental engineers	Industrial hygienists
Core evidence	Plume maps, well, tap, and indoor air testing, state cleanup files	Air monitoring, purchase records, safety data sheets, coworker testimony
Property claims	Possible for owners, with limits on trespass and nuisance	Rarely part of the case
Employer bar	Does not apply	Workers' compensation bars suing your employer

What Has to Be Proven

Whatever the pathway, New York requires the same structure of proof. An expert must show that TCE can cause your type of cancer, and that you were exposed to enough of it to cause yours.

Our guide to proving a workplace chemical caused your cancer explains that standard and the court decisions behind it. A reading above a health guideline helps show exposure, but it does not prove causation on its own.

The pathway changes how the dose gets estimated. In a groundwater case, a hydrogeologist traces how the contamination moved from the source property to your well or foundation, and the testing data supplies the concentrations.

A site already on the state's cleanup list or the EPA's National Priorities List usually comes with years of sampling data. That can save a groundwater case months of work, but someone still has to connect those readings to your home and your years living there.

How Long You Have to File

Both kinds of cases fall under CPLR 214-c. You generally have three years from the date you discovered your cancer, or reasonably should have. The clock runs from discovery of the illness itself, usually the diagnosis, not from the day you learn TCE caused it.

The statute has one narrow exception. If you learn the cause within five years of discovering the injury, you may be able to file within one year of learning it.

You would have to prove that the scientific knowledge needed to identify the cause was not available sooner, and for a chemical studied as closely as TCE, that is a hard argument.

Groundwater cases can raise one more rule. When the claim involves a release into the environment from a facility, a federal provision, 42 U.S.C. § 9658, can start the clock when you knew or should have known the contamination caused your illness, if that date is later than the state's.

Whether it applies depends on the facts, and the Supreme Court held in CTS Corp. v. Waldburger that it does not override state statutes of repose. Workers' compensation claims, wrongful death claims, and claims against public entities each run on their own shorter schedules.

Talk With a New York Cancer Lawyer

A TCE claim is built differently depending on whether the chemical came through your tap, your basement, or your workplace, and that decision shapes everything that follows. Porter Law Group's New York cancer lawyers can review how you were exposed and tell you which path fits. Call 833-888-LATE or request a free case evaluation.

Attorney advertising. This article provides general information and is not legal advice. Filing deadlines depend on the facts of each case.