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

Readington Township

Radon testing & mitigation in Readington Township

Newark Basin shale country. Free referrals to NJDEP-certified radon businesses covering Readington Township.

Readington Township sits in Readington Township — the largest municipality by area in Hunterdon County, running from Round Valley across farmland to the Somerset County line.

Housing stock. Preserved farmland and farmsteads alongside large-lot residential development, with several distinct historic villages.

Water supply. Outside the village systems this is largely well country. A Readington well draws from Passaic shale, or from the Cushetunk diabase at the reservoir end — two quite different aquifers inside one township.

The ground under Readington Township

Readington covers more ground than any other municipality in the county, and it takes in more than one geological setting while doing so. Most of the township is Passaic Formation shale, but Cushetunk Mountain — the ring of diabase that wraps Round Valley Reservoir — sits at its northwestern edge, and diabase behaves differently: harder, less permeable in bulk, and dependent on its fracture network to move gas. Housing runs from 18th and 19th century farmhouses with stone foundations and partly open cellars to large modern houses on preserved-farm frontage with poured basements. On the older properties a membrane system over an open cellar floor is frequently the right approach rather than a slab system that has no slab to work with.

Read that as the character of the ground rather than a claim about any one lot — geological boundaries cut across town lines, and the NJ Geological Survey's bedrock mapping is what settles which formation a given address sits on.

Around Readington Township. The requests come from the Stanton and Stanton Station area; Readington village and Centerville; the Three Bridges area on the South Branch; the Cushetunk Mountain and Round Valley Reservoir edge; the Solberg Airport and Pleasant Run country; the Route 523 and Route 202 corridors.

Working here

Open rural lots with ample room; older farmsteads can be more constrained.

What moves the cost here

Space is rarely the issue in Readington. What decides cost is the age of the foundation: a modern poured basement is a straightforward install, an 18th century stone cellar with a partial floor is a membrane job with a great deal of sealing. Both are common here, which is why quotes across the township vary more than the housing values would suggest.

Readington is the county's largest municipality by area and includes the Cushetunk Mountain diabase ring around Round Valley, so its bedrock is not uniform and a design that works on the shale side may not be the right one at the reservoir end.

Because so much of Readington's farmland has been preserved, its 18th and 19th century farmhouses remain in use in numbers, and open or partly floored cellars make sub-membrane systems more common here than in the county's newer townships.

Permits and paperwork

Permits run through the Readington Township construction office. With most of the township on private wells drawing from the same fractured rock, waterborne radon is a genuine second question rather than a rare one.

New Jersey municipalities sometimes share construction-code services with a neighbour, and postal addresses in this county frequently do not match municipal boundaries, so confirm which office actually has jurisdiction before anyone applies.

What NJDEP has actually measured in Readington Township

Test results in NJDEP's dataset4,041
At or above 4.0 pCi/L1,635
Share at or above the action level40%
NJDEP tierTier 1 — high potential

Tier 1 means at least 25 homes tested with 25 percent or more at or above 4 pCi/L.

Source: New Jersey Department of Environmental Protection, Radon Section, 2015 Radon Tier Assignment Report (May 2015). NJDEP's figure is a cumulative count of test results in its dataset, not a count of distinct homes. These are municipality-wide totals and say nothing about any individual property — only a test does that.

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Most relevant here

The usual requests from Readington Township

What this bedrock and this housing stock tend to produce.

Short-term radon test in Readington Township

A 48-hour closed-house test at the lowest lived-in level, placed and read by a New Jersey certified measurement business. The number everything else follows from.

$150 – $325 typical range, not a quote

Nearby

Same ground, same questions

Near Readington Township

Red shale and mudstone of the Passaic Formation under Flemington and the centre of the county. Fractured rock, plenty of basements, and a mix of public water and wells.