Radon in Water in Cherry Hill, NJ — What South Jersey Homeowners Should Understand Before Assuming It’s Not a Concern
Cherry Hill is predominantly a municipal water community, and most South Jersey homeowners assume that means radon in water simply isn’t their concern. That assumption is largely reasonable — Camden County Municipal Utilities Authority treats Delaware River source water in ways that significantly reduce radon before distribution. But “largely reasonable” and “definitively answered” are different things, and for any Cherry Hill homeowner on a private well, or for anyone who’s found elevated indoor air radon without a clear explanation, waterborne radon deserves a direct test rather than a statistical dismissal. A comprehensive water quality assessment that specifically includes radon closes the question with data rather than assumption.
Understanding Radon in Water — The Exposure Pathway Most Municipal Water Customers Don’t Think About
Radon is a naturally occurring radioactive gas produced as uranium decays in rock and soil. Most homeowners encounter it as an airborne concern — rising through foundation cracks and accumulating in lower living spaces. The water pathway is less familiar: radon dissolves into groundwater as it moves through uranium-bearing geological formations, and a private well draws that groundwater directly into the home. For municipal water customers, treatment — particularly aeration — reduces this dramatically. For well water customers, there’s no such reduction.
Once radon-containing water is inside the home, it releases the dissolved gas into indoor air whenever the water is agitated — in the shower, the dishwasher, or at a running faucet. Research has estimated that 10,000 pCi/L of radon in water contributes approximately 1 pCi/L to indoor air radon levels. That exposure pathway is separate from whatever the soil-gas pathway is contributing, and testing only one gives you an incomplete picture of your home’s total radon exposure. Radon in water cannot be detected without a laboratory test specifically ordered for it.
Cherry Hill’s Water Context — What the Delaware River Source and South Jersey Geology Mean
South Jersey sits in a geological zone that’s generally lower in naturally occurring radon than the crystalline bedrock counties of northern New Jersey. The Delaware River source water that supplies Cherry Hill’s municipal supply — along with the sedimentary formations of Camden County — produces lower baseline radon-in-groundwater concentrations than aquifer systems in Hunterdon, Morris, or Somerset counties. That geological context matters: the radon risk profile for Cherry Hill is meaningfully lower than for communities in northern New Jersey’s elevated zones.
For Cherry Hill municipal water customers, the combination of lower-radon source geology and treatment-based radon reduction makes elevated waterborne radon at the tap statistically unlikely. However, homeowners who’ve tested indoor air and found elevated levels without a clear soil-gas source still have reason to test water as a contributing factor — and for any property in the area on a private well, testing is appropriate regardless of the regional geology baseline. Nearby Haddonfield, Marlton, Voorhees, and Pennsauken share the same South Jersey geological and water supply context.
When Testing Makes Sense for a Cherry Hill Home
- Your property is connected to a private well in Camden County or the surrounding area
- You’ve tested indoor air radon and found elevated levels without a clear explanation
- You’re purchasing a home with a private well and want a complete water quality baseline
- You want certainty rather than a regional assumption about municipal treatment effectiveness
- You’re approaching water quality comprehensively and want radon ruled in or out
Radon in Water Risk by Scenario — Cherry Hill Area Homeowners
| Scenario | Risk Level | Recommended Action |
|---|---|---|
| Private well in Camden County | Moderate — direct groundwater exposure without treatment | Test as part of any comprehensive well panel |
| Cherry Hill municipal water customer | Lower — treatment and South Jersey geology reduce risk | Test if indoor air radon is elevated or if concerned |
| Elevated indoor air radon, source unclear | Water may be contributing — unknown without testing | Test water radon as part of full radon assessment |
| Home purchase with private well | Unknown — baseline needed | Test before or immediately after closing |
What Happens After Testing
A radon-in-water test produces a specific picocuries-per-liter concentration. Below the EPA’s suggested action level of 4,000 pCi/L, no treatment is required. Above it, treatment options — aeration systems and granular activated carbon filtration — are effective and established. Our radon in water removal page covers the treatment picture in full. For homeowners also thinking about PFAS, chloramine byproducts, and lead in Cherry Hill’s Delaware River supply, our water filtration page covers those concerns alongside radon. Our full New Jersey service area covers communities statewide.
Frequently Asked Questions — Radon in Water Testing in Cherry Hill, NJ
Is radon in water a real concern for Cherry Hill municipal customers?
For most Cherry Hill municipal customers, the risk is low — both because South Jersey’s sedimentary geology produces lower radon concentrations than northern New Jersey’s crystalline bedrock, and because Delaware River source water treatment reduces radon significantly. The concern becomes relevant when indoor air radon is elevated without a clear explanation, or for any property on a private well regardless of regional geology.
Does South Jersey have radon in groundwater?
Yes, though generally at lower concentrations than the crystalline bedrock zones of northern and northwestern New Jersey. Radon is present in groundwater throughout New Jersey to varying degrees — the geological zone determines baseline risk, but individual well radon levels can vary within any zone. Testing a private well gives you a specific answer for that specific well rather than a regional estimate.
Is radon testing included in a standard water quality test?
No. Radon in water requires a specific laboratory analysis ordered separately from standard water quality panels. A comprehensive test covering PFAS, lead, hardness, and bacteria does not include radon unless it’s explicitly requested. If radon wasn’t on your water test panel, that question remains unanswered.
What concentration of radon in water requires action?
The EPA’s suggested action level for private well water is 4,000 pCi/L. We walk through what your specific results mean when they come back — in the context of your home’s total radon exposure picture, not just as a number against a threshold.
How soon can I arrange testing?
We’re typically able to schedule within a few days. Sample collection takes under an hour at your home, and laboratory results for radon-specific analysis return within approximately one to two weeks.
Get a Clear Answer About Radon in Your Cherry Hill Home’s Water
If you’re in Cherry Hill and want to rule out waterborne radon as a factor — or if you’re on a private well and haven’t yet included radon in a comprehensive well water baseline — this is a straightforward test to add and a clear question to answer. We serve Cherry Hill and all of Camden County. Call us at (732) 357-1988 or reach out online.
