Radon Testing and Mitigation in Windsor, CO
Five lakes, two golf courses, and a water park sit inside one of Colorado’s fastest-growing towns, and every rooftop above them sits in radon country. Windsor straddles Weld County (about two-thirds) and Larimer County (about one-third), and both sides fall entirely within EPA Radon Zone 1, the agency’s highest-potential category. If you own or rent here, a soil gas called radon is worth a few minutes of attention, and NoCo Radon Pros exists to connect you with an independent, Colorado-licensed radon professional who can measure it and fix it.
Why Windsor’s new homes still need a test
Windsor’s population reached 32,716 in the 2020 census, up from roughly 8,000 to 9,000 in 2000. That growth shows up in the housing, where much of the town’s stock is recent construction. Master-planned communities like Water Valley, built around its five lakes and golf, RainDance with its golf course and water park, and Poudre Heights account for a large share of that new construction.
New construction is exactly where radon gets underestimated. Colorado has no statewide mandate for radon-resistant building, and radon control is an optional appendix in the residential code that a local jurisdiction has to adopt. Even where a builder installs a passive rough-in pipe, that pipe is not proof the finished home reads below the action level. It often needs an active fan to actually pull radon out, and only a measurement tells you whether it does.
Because so much of Windsor’s stock is a decade old or newer, many owners assume a modern home is a safe home. Radon does not work that way. It seeps up from the granitic soils under the whole region, and a 2018 build in RainDance can test just as high as an older place across the county line.
The Zone 1 reality across both counties
The EPA radon zone map places both Larimer and Weld in Zone 1, meaning the predicted average indoor screening level is greater than 4.0 pCi/L. Statewide, CDPHE reports that about half of Colorado homes exceed 4.0 pCi/L. That is a Colorado figure, not a Windsor-specific one, but it explains why testing here is routine rather than paranoid.
The EPA action level is 4.0 pCi/L. At or above that number, the EPA advises fixing the home; between 2.0 and 4.0 pCi/L, action is worth considering. A short-term test kit or a licensed measurement gives you the number for your specific address. Our radon testing overview walks through how results are read, and what a test result means breaks down the pCi/L scale in plain terms.
What happens after a high result
A result at or above 4.0 pCi/L is a trigger, not an emergency. The next step is mitigation by a Colorado-licensed professional. For most homes a standard sub-slab system costs $1,000 to $2,500, with about $1,500 common. When a Windsor builder has already installed a passive rough-in, activating it with a fan often runs only about $500 to $800, which is one more reason the newer neighborhoods can be less expensive to fix. Our radon mitigation service page explains how systems work, and the Colorado mitigation cost guide covers the full price range.
Radon matters because CDPHE and the EPA identify it as the second leading cause of lung cancer in the United States after smoking. Testing is the cheap, quiet way to stay ahead of it.
How NoCo Radon Pros fits in
We are a free matching service, not a contractor. NoCo Radon Pros does not test, mitigate, or hold a Colorado radon license. Colorado licenses radon professionals through DORA, and that license belongs to the person doing the work. You can and should verify any contractor’s credential on the state license lookup before work begins.
What we do is connect Windsor residents, in Water Valley, RainDance, Poudre Heights, and every subdivision in between, with an independent, state-licensed local radon professional who handles the testing and the mitigation. If you are buying or selling here, the Colorado radon disclosure law guide covers what the sales statute requires, and our law overview ties the pieces together. When you are ready, tell us about your home and we will point you to a licensed professional. You can also see how we are paid so there are no surprises.