
MonitorAEGTEST
HOUND-1011 rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
Locations and reports
EPA puts Winchester city in Zone 1, its highest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
The data
Winchester city, At a glance
Predicted: EPA radon zone
This is a county-level geologic prediction. It is not a measurement of any address, and houses with elevated radon are found in all three zones.
EPA predicts an average indoor
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Of 773 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 272 | 35.2% |
| 2 to 4 pCi/L | 155 | 20.1% |
| 4 pCi/L and above | 346 | 44.8% |
CDC publishes this figure only for counties here, so there is no state or national number to compare Winchester city, Virginia with.
Distribution of radon tests reported to CDC, not this house. People testing before a sale, or because they suspect a problem, are over-represented in any reported testing data.
The figures at the top are for 2008 to 2017 (laboratory totals): a percentage there is a share of radon tests reported to CDC for Winchester city over 2008 to 2017, laboratory, and a percentage in a view below is a share of the tests reported for the year or period it names. It is not a share of homes in Winchester city, and it is not a random sample: it counts only the tests people chose to run and that were reported.
CDC works out the shares and the median over pre-mitigation tests, counting a test not marked as before or after mitigation as one of them (773 for 2008 to 2017, laboratory). The median is the middle result of those tests, not of buildings. CDC also reports the number of buildings tested (665), a different count, so the two totals are not interchangeable.
Winchester city's own published CDC figures beside those of the counties that border it, for the same period.
Each figure is that county’s own published CDC figure for 2008 to 2017, laboratory, counting radon tests reported to CDC, not homes. Winchester city is this page. Nothing is averaged or combined across counties. The test count beside each county is CDC’s published number of pre-mitigation tests behind its figures. Figures from few tests can swing widely from year to year. Every Virginia county’s own figure is in the Virginia county table.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Radon Action Brief
National Radon Action MonthPre-sale
Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25Sale ends January 31, then $25
Local help
Winchester city, Local resources
Who tests and fixes radon in Winchester city: listed businesses, Virginia's radon program and test kits.
Virginia Department of Health is offering a limited supply of short-term, do-it-yourself radon test kits available for only a $4 shipping fee.
Listed radon professionals by town: Winchester
The Code of Virginia requires that Radon testers and mitigators be currently certified by either the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB).
What it means
Winchester city, Questions
No listed mitigator names Winchester city as a service area yet; the Virginia directory lists 1 company. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional. Your state radon program is the place to check whether Virginia requires one.
Radon mitigation: how it worksRadon mitigation costRadon mitigation systemsMitigators in Virginia
EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. No radon testing business listed on Radon411 has an address in Winchester city or names it as a service area yet. The Virginia radon program is the place to ask about certified testers and any test kit offer it runs.
Radon testing: how to test a homeRadon test kits comparedFree and low-cost kits by stateRadon Action Month checklistVirginia radon program
Over the 2008 to 2017 laboratory totals, 44.8% of the radon tests reported to CDC for Winchester city, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.3 pCi/L. That is a share of reported tests, not of homes. EPA places Winchester city in Zone 1, highest predicted potential, a predicted average indoor screening level greater than 4 pCi/L. Homes with elevated levels occur in all three zones, so the figures describe the area, not your house. Testing is the only way to know the radon level in a specific building.
Radon levels: what a result meansWhat is radon?Radon levels in Virginia
EPA places Winchester city, Virginia in Zone 1, which EPA describes as highest predicted potential for the area. A zone is a prediction for the whole county and never determines whether a particular home should be tested. EPA recommends testing every home regardless of zone.
Yes. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. How to test a home.
EPA says short-term tests stay in the home from 2 to 90 days and that all radon tests should run a minimum of 48 hours; long-term tests stay more than 90 days. EPA's guides do not name a best season: they say radon levels tend to vary from day to day and season to season, so a long-term test is more likely than a short-term test to tell you the year-round average.
EPA's Citizen's Guide calls testing easy and inexpensive, and EPA's Home Buyer's and Seller's Guide says passive short-term and long-term devices are generally inexpensive, while active devices may cost more. No national average price is published for this, so Radon411 does not give one. What testing costs.
Winchester city borders 1 county, derived from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.
The reported-test figures on this page describe Winchester city, Virginia over the 2008 to 2017 laboratory totals. They describe tests other people carried out in other buildings, and none of them measures yours.
What the published data says about Winchester city, in words. A zone and a share of tests describe an area, never the level in any one home.
EPA places Winchester city in Zone 1, highest predicted potential, as it does 61 other counties of Virginia's 133.
Its one bordering county, Frederick County, is in Zone 1.
CDC publishes no annual figure for Winchester city; its figure is a laboratory total for 2008 to 2017: 44.8% of 773 reported tests were at or above 4 pCi/L.
Virginia's radon program is the VDH Radon Program, run by Virginia Department of Health; its contacts are under Local resources.
The county's largest incorporated place is Winchester; the figures here cover them as part of the county.
Products
Winchester city, Products
Whatever the figures for Winchester city show, only a test tells you about one home.
Test kits and monitors: 1 of 42
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Winchester city is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Winchester city
Testing: 1 of 5
Mitigation: 1 of 3
Explore
Winchester city, Bordering counties
counties bordering Winchester city: 1 of 1
One county shares a boundary with Winchester city, computed from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county’s report can be worth reading alongside this one.
Winchester city, Cities and towns
The radon figures on this page are for Winchester city as a whole. They do not differ by city or town.
One incorporated place, as listed in the U.S. Census Bureau’s 2020 place reference files.
Winchester city, Next steps
What to do next: 1 of 4
Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.