Hunterdon County · 25 of 26 towns NJDEP Tier 1 Action level 4.0 pCi/L Free for homeowners — paid by the crews
Hunterdon RadonTesting & mitigation

Annandale, Clinton Township

Active sub-slab depressurization in Annandale

One or more suction points through the slab, sealed pipe to above the roofline, and a fan outside the living space. The system most Hunterdon houses get.

Annandale owners ask about active sub-slab depressurization more than you would think for a town this size.

What usually prompts the call

  • A finished basement that is used as living space and has never been tested
  • A test came back at or above 4.0 pCi/L on a basement or slab home
  • Cracks and utility penetrations through a slab you can see daylight around

Why this comes up in Annandale

The neighbourhoods and the rural fringe are not on the same supply. A well here draws from the transitional ground between the Highlands and the Newark Basin.

Clinton Township — the state's own numbers

36% of the 5,885 test results NJDEP holds for Clinton Township were at or above the 4.0 pCi/L action level — 2,126 of them. That puts it in Tier 1 — high potential. NJDEP reports Clinton Township together with Clinton Town as one row, so both carry these figures.

An older village centre around the station with extensive later residential development, including a number of large planned neighbourhoods, spreading out from it.

What access looks like here

Subdivision lots with good access; the village core is tighter.

Clinton Township handles permitting for work at this address.

The usual approach

The standard fix. A suction point is cut through the slab, pipe is run up through the house or along an exterior wall, and an in-line fan mounted outside conditioned space pulls soil gas from under the floor and discharges it above the roofline. Sizing follows a diagnostic reading of how permeable the fill under the slab actually is, not the square footage of the house.

Typical cost in Hunterdon County, NJ

$1,200 – $2,600 — typical range, not a quote. What your building needs can only be settled by a certified business that measures it on site.

The sooner it is measured, the more of the options stay open.

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.

Want to know what a fix would actually cost?

Write down what the system is doing and what the re-test said. We'll get it to crews who diagnose rather than guess.

Get quotes in Annandale →

Related

Also common in Annandale

Other work in Annandale

Same ground, different question.

Active sub-slab depressurization nearby

Neighbouring towns on the same ground.