Village, Winnebago County, Illinois
Radon Testing in Pecatonica, IL
Updated
Out of 99 IEMA-recorded radon tests taken in Pecatonica, 45.5% came back at 4.0 pCi/L or higher, the EPA's action level. Pecatonica 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.
Pecatonica is a village in Winnebago County with about 2,024 residents and 997 homes, median year built 1959. Neighboring towns include Winnebago, Rockford and Durand. It sits on the Pecatonica River, in the western part of the county.
What IEMA's radon test records show
20.2% of tests in Pecatonica came in at 10 pCi/L or higher, well above the action level, and 4% were 20 or higher. The highest reading IEMA has on record here is 30 pCi/L. The average result in Pecatonica is 5.83 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+ | |
|---|---|---|---|---|---|
| Pecatonica | 99 | 5.83 | 45.5% | 20.2% | 4% |
| Winnebago County | 7,642 | 4.23 | 36.7% | 7.9% | 1.1% |
Source: IEMA radon test records, Illinois Emergency Management Agency.
The ground under Pecatonica
Winnebago County sits in the Rock River valley of north-central Illinois. Its bedrock is dolomite and limestone left from the Ordovician and Silurian periods, buried under glacial till and outwash the last Ice Age left behind. The EPA places Winnebago County in Radon Zone 1, its highest-potential category: a predicted average indoor screening level at or above 4.0 pCi/L.
Housing in Pecatonica
Census Bureau, American Community Survey 2020 to 2024 5-year estimates.
| Homes (housing units) | 997 | 125,002 in Winnebago County |
| Median year built | 1959 | 1971 countywide |
| Built before 1980 | 83.4% | 74% countywide |
| Attached (rowhome, townhouse) | 5.5% | 4.3% countywide |
| Mobile homes | 0% | 1.3% countywide |
| Renter-occupied | 19.6% | 34.1% countywide |
32.8% of homes in Pecatonica were built before 1940, against 15.5% county-wide. Houses that old usually sit on stone or early block foundations with plenty of joints for soil gas to move through. That does not mean they cannot be tested and fixed, just that a mitigation contractor may need more than one suction point.
What we do in Pecatonica
Radon testing, Buying or selling a home, and New construction.
Common questions
Is radon a problem in Pecatonica?
Yes. IEMA has 99 radon test results on record for Pecatonica, and 45.5% 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 Pecatonica?
30 pCi/L is the top reading IEMA has logged for Pecatonica, among 99 tests on file. One high neighbor does not predict your own number, which is exactly why testing beats assuming.
We're closing on a house in Pecatonica soon. Is there time to test?
Usually yes. A short-term test takes a few days to about a week, which fits inside most inspection periods if it's scheduled early. See our <a href="/real-estate-radon-testing">real estate radon testing</a> page for how that timing works.
Need radon testing booked in Pecatonica?
Tell us why you're testing and any deadline you're working against. You get a fixed price and a straight answer back.