Radon Testing and Mitigation in Berthoud, CO
Golf-course fairways and brand-new rooftops now fill land that was open prairie a few years ago, and Berthoud has grown right along with them. This small town straddles the Larimer and Weld county line and has jumped from 10,332 residents in the 2020 census to an estimated 14,022 in 2025, among the faster-growing towns in the region. That pace matters for radon, because both Larimer and Weld counties sit in EPA Radon Zone 1, and a new home is not automatically a radon-safe home.
Radon measurement and mitigation are licensed work in Colorado, and a quote costs nothing. Get a free radon quote for your Berthoud property.
Why radon is worth checking in Berthoud
Berthoud’s location puts it squarely in EPA Radon Zone 1, the highest-potential category, where the predicted average indoor screening level is greater than 4.0 pCi/L. Zone 1 is a county-wide prediction, not a measurement for any one house, so two homes on the same street can read very differently. Statewide, CDPHE reports that about half of Colorado homes exceed the action level, which is why testing is the standard first step no matter how new or old the home is.
The EPA action level is 4.0 pCi/L. At or above that number, the EPA advises fixing the home. A radon result of 4.0 pCi/L or higher is the trigger that leads most Berthoud homeowners to mitigation, and it is a licensed professional, not this site, who takes the measurement and interprets it. The reason the number matters is health: CDPHE notes radon is the second leading cause of lung cancer in the US after smoking, and the leading cause among people who have never smoked. If you want help reading a report, our radon test results explained guide breaks down what the pCi/L figure means.
The new-build angle: rough-ins are not finished systems
A lot of Berthoud’s growth is master-planned and new. Heron Lakes wraps about 865 acres around the TPC Colorado Golf Club with roughly 1,258 planned homes, and Vantage, PrairieStar, Hammond Farm, and Heritage Ridge have added hundreds more. Many of these homes were built with a passive radon rough-in, a length of pipe run from under the slab up through the roof.
Here is the catch: a rough-in is a starting point, not proof. It has no fan, so it may or may not be holding the home below 4.0 pCi/L. There is no statewide mandate for radon-resistant construction in Colorado, so what a given builder installed depends on local code and the builder’s choices. The only way to know whether a Berthoud home is actually below the action level is to test it. If the number comes back high, a licensed professional can activate the passive system with a fan or install a full one. Our radon testing overview and mitigation overview walk through both paths.
Buying or selling a Berthoud home
Fast-growing towns see a lot of resales, and Colorado law now shapes how radon shows up in those deals. Under the state disclosure law (C.R.S. 38-35.7-112), every residential real estate contract must carry a bold-faced radon warning, and the seller must disclose known radon information and provide the current CDPHE radon-in-real-estate brochure. A high test result during an inspection is one of the most common reasons mitigation happens, and it often has to fit inside a closing timeline. Our guide on selling a house with high radon covers how that plays out.
Getting a radon quote in Berthoud
Tell us about the Berthoud property and what you need, whether that is a first test, a system for an existing home, or activating a builder rough-in. An independent, Colorado-licensed radon professional serving Larimer and Weld Counties quotes the job and does the work. NoCo Radon Pros is paid by the professional, which is why the quote is free to you. See how we make money for the full explanation.
Because Colorado licenses radon professionals through DORA, you can always confirm credentials yourself on the DORA license lookup. To start, use our contact page, or read up first with the Colorado radon law guide. Neighboring towns have their own pages too, including Loveland and Windsor.