Lambertville owners ask about radon-in-water aeration system more than you would think for a town this size.
How this normally comes up
- A gross alpha or radon-in-water result from a Private Well Testing Act sample
- A private well and an indoor reading that a soil-gas system did not fully explain
- Neighbours on the same aquifer with known radioactivity in their water
Why this comes up in Lambertville
The city is largely on a public supply, so a Lambertville job is normally an air-side job — which is not the case a mile inland in West Amwell. That is part of the context any crew working in Lambertville has to design around.
City of Lambertville — the state's own numbers
26% of the 1,422 test results NJDEP holds for City of Lambertville were at or above the 4.0 pCi/L action level — 368 of them. That puts it in Tier 1 — high potential.
A dense, largely 19th century city of row and semi-detached houses on narrow lots, with later building on the higher ground.
Practicalities in Lambertville
Narrow lots, shared and near-shared walls, and steep streets. Access is the defining constraint here.
Construction permits go through City of Lambertville, and installing radon mitigation for a fee anywhere in New Jersey requires NJDEP certification.
The usual approach
Aeration strips radon out of the water in a vented tank before it reaches the taps, then discharges it outdoors. It is the treatment the EPA points to for high waterborne radon, it needs a repressurisation pump and annual servicing, and it belongs at the point of entry — treating one bathroom does nothing for the rest of the house.
Typical cost in Hunterdon County, NJ
$3,800 – $6,500 — typical range, not a quote. What your building needs can only be settled by a certified business that measures it on site.
Two houses on the same road in Lambertville can need completely different systems.
Who is allowed to do this in New Jersey
Under N.J.A.C. 7:28-27 this is not work a general contractor may take on. It requires a business certified by NJDEP for radon mitigation, with a certified mitigation specialist directing the work. We verify that on the state register, note the date, and route accordingly — but a verified certification is a fact, not a recommendation.
Never tested, and wondering whether to?
Give us the short version and the timeline. We'll put it in front of crews who can work to it, and tell you honestly if nobody can.
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Also common in Lambertville
Other work in Lambertville
Same ground, different question.
Radon-in-water aeration system nearby
Neighbouring towns on the same ground.