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

Clinton, Clinton Town

Sealing, sump covers and slab-crack closure in Clinton

Gasketed sump lids, sealed floor-wall joints, and closed slab penetrations. Rarely enough alone — but it makes the system that follows work properly.

Clinton owners ask about sealing, sump covers and slab-crack closure more than you would think for a town this size.

What usually prompts the call

  • A visible gap where the slab meets the foundation wall
  • An open sump pit sitting in a finished basement
  • A crawl-space hatch that soil gas moves straight through

Why this comes up in Clinton

The town centre is served by a public supply, so waterborne radon is usually not part of a Clinton Town job — unlike the surrounding township, where it frequently is.

Clinton Town — the state's own numbers

36% of the 5,885 test results NJDEP holds for Clinton Town 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 Town together with Clinton Township as one row, so both carry these figures.

A dense, well-preserved 19th century centre with modest later development on the surrounding streets.

What access looks like here

Small close-set lots in the historic centre; more room on the outer streets.

Clinton Town handles permitting for work at this address.

The usual approach

Sealing on its own rarely brings a house below the action level and should not be sold as though it will. What it does is make an active system work harder for its money by cutting the leakage paths that otherwise short-circuit the suction — so it is nearly always done as part of an install rather than instead of one.

Typical cost in Hunterdon County, NJ

$400 – $1,300 — typical range, not a quote. What your building needs can only be settled by a certified business that measures it on site.

What it costs comes down to the foundation, the number of suction points, and where the pipe can run.

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?

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.

Get quotes in Clinton →

Related

Also common in Clinton

Other work in Clinton

Same ground, different question.

Sealing, sump covers and slab-crack closure nearby

Neighbouring towns on the same ground.