From field technician to General Manager, John has spent more than 30 years in New Jersey basements, crawlspaces and well rooms. Today he leads the RAdata team that tests and treats for radon, well water problems and mold.
When John Cowell joined RAdata in 1992, the company had already spent eight years as New Jersey’s first licensed radon business. He started in the field as a technician, placing tests and installing systems in homes across the state.
Over the next three decades he took on more of the operation. As supervisor of installations and service, and as an estimator, he designed systems for individual homes, managed a crew of 15, and kept scheduling, inventory and material orders moving so installs happened on time. In 2023 he became General Manager.
That path matters to customers. The person running RAdata today has done the work his technicians do, and he knows what a well-built radon system or water treatment install should look like because he spent years building them himself.
John has spent his entire career at RAdata, and every role along the way prepared him for the next. Here’s how a field technician who started in 1992 came to lead the team today.
John starts in the field, placing radon tests and installing systems in homes across New Jersey, eight years after RAdata became the state's first licensed radon business.
Designs radon and water treatment systems for individual homes and leads a crew of 15, keeping scheduling, inventory and material orders on track so every install happens on time.
Takes responsibility for RAdata's full New Jersey operation: field crews, estimating, service, and the radon and drinking water labs in Flanders.
John's team now offers mold inspection and remediation alongside radon and well water work, serving all of New Jersey plus nearby Pennsylvania and New York.
As General Manager, John is responsible for every part of RAdata’s New Jersey operation:
Radon. Every job starts with a measurement. RAdata’s certified technicians place the test, and the kit comes back to our own lab in Flanders, where kits received by noon on a weekday are reported the same day. If levels are high, a specialist looks at the foundation, slab and soil conditions and designs a radon mitigation system for that home, then a retest confirms it works. Already have a system? John’s service team maintains and repairs existing systems, whoever installed them.
Well water. Much of RAdata’s water work starts with a home sale. New Jersey’s Private Well Testing Act requires a standard water test before most private-well homes change hands, and RAdata collects and analyzes those samples in-house. When results show a problem, including PFAS, the team sizes treatment to what the lab actually found. Every water treatment system is installed by RAdata Water Treatment LLC under master plumber Drew Lovasi (NJ Plumbing Lic. #12830).
Mold. RAdata now offers mold inspection and remediation. John’s approach is the same one he brings to radon and water: find the cause first. The team traces the moisture that let mold grow, removes affected materials and corrects the source so the problem doesn’t come back.
John is licensed or certified for radon work by three bodies:
He works alongside RAdata’s company-level credentials: NJDEP Radon Measurement and Mitigation Business licenses (#90001) and New Jersey laboratory certification (OQA #14006).
One test per 2,000 square feet of each foundation, plus one for each additional foundation type. A home with a basement and a crawlspace, for example, needs two.
Appointments are first-come, first-served, and RAdata can typically schedule a test within 3 to 5 business days. A radon test runs at least 48 hours, and kits that reach the Flanders lab by noon on a weekday are reported that day.
No. Self-service kits can only be used by the homeowner for their own information. Real estate transactions need a test placed by a certified technician.
Yes. John’s service team works on existing radon and water treatment systems no matter who installed them.
PWTA results are valid for one year from the sample date, but bacteria must be resampled after six months.
RAdata’s crews leave Flanders every day for homes across New Jersey, from Bergen County to Mercer and from Warren County to Monmouth. The team also serves nearby communities in eastern Pennsylvania (Bucks, Lehigh, Monroe, Northampton and Pike counties) and southern New York (Rockland and Orange counties). Find your town on our Service Areas page.
John also leads Protect Environmental’s New Jersey operation. View his Protect Environmental profile.
New Jersey's first licensed radon business, serving homes since 1984. John and the Flanders team handle radon, well water and mold across New Jersey and nearby Pennsylvania and New York.
Get a Free Estimate (973) 927-7303Whether you need a radon test for a closing, answers about your well water, or help with mold in the basement, call RAdata at (973) 927-7303. You’ll reach a real person, not an answering machine.
