Village, Winnebago County, Illinois
Radon Testing in Cherry Valley, IL
Updated
Out of 207 IEMA-recorded radon tests taken in Cherry Valley, 50.2% came back at 4.0 pCi/L or higher, the EPA's action level. Cherry Valley runs clearly hotter than the rest of Winnebago County on this measure. Testing runs $150 to $300 in this area. No number here tells you what your own house will read; only a test does that.
Cherry Valley is a village in Winnebago County with about 3,749 residents and 1,528 homes, median year built 1997. Neighboring towns include Rockford, Belvidere and Poplar Grove. It borders Rockford's southeast side.
What IEMA's radon test records show
13% of tests in Cherry Valley came in at 10 pCi/L or higher, well above the action level, and 2.9% were 20 or higher. The highest reading IEMA has on record here is 32 pCi/L. The average result in Cherry Valley is 5.29 pCi/L, against 4.23 for Winnebago County overall. This comes from IEMA's own records: results licensed measurement professionals submitted between 2003 and July 2019, with only the highest reading kept per address. Not a random sample, and not broken out year by year, but it is the closest primary radon data Illinois makes public.
| Tests | Avg pCi/L | 4+ pCi/L | 10+ | 20+ | |
|---|---|---|---|---|---|
| Cherry Valley | 207 | 5.29 | 50.2% | 13% | 2.9% |
| Winnebago County | 7,642 | 4.23 | 36.7% | 7.9% | 1.1% |
Source: IEMA radon test records, Illinois Emergency Management Agency.
The ground under Cherry Valley
North-central Illinois, where Winnebago County sits, is built on Ordovician and Silurian dolomite and limestone, covered by glacial till and outwash from the last Ice Age. That bedrock and cover combination is why the EPA rates the whole county Radon Zone 1, its highest-potential classification, with predicted average indoor screening levels at or above 4.0 pCi/L.
Housing in Cherry Valley
Census Bureau, American Community Survey 2020 to 2024 5-year estimates.
| Homes (housing units) | 1,528 | 125,002 in Winnebago County |
| Median year built | 1997 | 1971 countywide |
| Built before 1980 | 26% | 74% countywide |
| Attached (rowhome, townhouse) | 14.8% | 4.3% countywide |
| Mobile homes | 0% | 1.3% countywide |
| Renter-occupied | 18.7% | 34.1% countywide |
40.4% of the homes here were built in 2000 or later, one of the higher shares in the county. New construction is not automatically low-radon: a tight, modern house can hold the gas in as well as it holds heat in, and testing after the home is closed up is the only way to know. See our new construction radon testing page. About 14.8% of homes in Cherry Valley are attached (rowhomes, townhouses, twins), against 4.3% countywide. A shared wall does not stop radon and a neighbor's test does not tell you about your unit, so each one needs its own.
What we do in Cherry Valley
Radon testing, Buying or selling a home, and New construction.
Common questions
Is radon a problem in Cherry Valley?
Yes. IEMA has 207 radon test results on record for Cherry Valley, and 50.2% came back at or above the EPA's 4.0 pCi/L action level. Winnebago County as a whole sits in EPA Radon Zone 1, the highest-potential category.
What is the highest radon reading on record near Cherry Valley?
32 pCi/L is the top reading IEMA has logged for Cherry Valley, among 207 tests on file. One high neighbor does not predict your own number, which is exactly why testing beats assuming.
Does a new home in Cherry Valley still need radon testing?
Yes. Radon comes from the ground a house sits on, not the age of the structure, and 40.4% of homes here were built in 2000 or later. A passive vent pipe roughed in during construction helps, but only testing after the home is closed up confirms it's enough.
Nearby
Rockford (36.8% of tests at 4+ pCi/L), Belvidere (47.9% of tests at 4+ pCi/L), Poplar Grove (58.1% of tests at 4+ pCi/L).
Need radon testing booked in Cherry Valley?
Tell us why you're testing and any deadline you're working against. You get a fixed price and a straight answer back.