Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Harrisonburg city, Virginia
EPA puts Harrisonburg city in Zone 1, its highest radon zone, and 33.4% of its 599 reported radon tests (2008 to 2017, laboratory totals) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
33.4%
3.0 pts above VA
- Harrisonburg city
- 33.4%
- Virginia
- 30.4%
599 tests, 2008 to 2017
Median result
2.4pCi/L
Below action level
- Harrisonburg city
- 2.4 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
599
22nd of 84 by tests
- Harrisonburg city
- 599
- Fairfax
- 8,657
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Virginia
47 of 84
Middle half
- Harrisonburg city
- 33.4%
- Russell
- 67.3%
By share, of 84 with 30+ tests
Read a result for Harrisonburg city
Starts at Harrisonburg city's median, 2.4 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.4 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Harrisonburg city's median reported result, 2008 to 2017.
The data
Harrisonburg city, At a glance
Harrisonburg city at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Harrisonburg city in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Harrisonburg city, 2008 to 2017, laboratory
Under 2 pCi/L: 43%2 to 4 pCi/L: 24%4 pCi/L and above: 33%
Of 599 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 257 | 42.9% |
| 2 to 4 pCi/L | 142 | 23.7% |
| 4 pCi/L and above | 200 | 33.4% |
What these figures count
These are the 599 tests reported to CDC for Harrisonburg city over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Harrisonburg city, Compared
Harrisonburg city radon figures, compared
Calculated by Radon411In Harrisonburg city, about 3 in 10 reported tests over the 2008 to 2017 laboratory totals (200 of 599) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 2.3 points lower. Across 131 Virginia counties pooled together, 30.4% of tests reached that level, so Harrisonburg city runs 3.0 points above its state.
Rockingham County, the one bordering county with a figure for the same period, reported 43.9%. By share, Harrisonburg city is 47th of 84 Virginia counties with 30 or more tests for the same period.
Half the tests came in under 2.4 pCi/L and half over it; the single highest reached 42.1 pCi/L. Below the action level, 257 tests (42.9%) came in under 2 pCi/L, against 44.7% statewide, and 142 tests (23.7%) fell between 2 and 4, against 24.9% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 33.4% share point the same way here. USGS geology rates 100% of the county's land high radon potential. CDC also counts 43 tests taken after mitigation in Harrisonburg city for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Harrisonburg city went from 480 tests (2005 to 2014) to 599 (2008 to 2017), the share going from 36.3% to 33.4%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Harrisonburg city, Geology
The ground under Harrisonburg city
PredictedUSGS's geologic map puts all of Harrisonburg city's mapped land in one class: high radon potential. All of it lies in the area the map calls Valley and Ridge, to which USGS gives a radon index of 15, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Valley and Ridge | Cambrian dolomite, limestone, shale, and sandstone, Silurian-Ordovician limestone, dolomite, shale, and sandstone, Mississippian-Devonian sandstone, shale, limestone, gypsum, and coal. | High | 15 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Harrisonburg city beside the ground around it
Harrisonburg city has more high-potential ground than Virginia as a whole: 100% of its land against 47.9%. Of the one county that borders it, none has as large a share of high-potential ground; Rockingham County comes nearest at 95.2%.
The map rates the ground, not the air in any home.
Local help
Harrisonburg city, Local resources
Radon testing and mitigation in Harrisonburg city
- VDH Radon ProgramVDH Radon Program answers questions about testing, mitigation and the rules in Virginia.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in Virginia2 professionals are listed in Virginia.
What Virginia's program says
- Phone
- (804) 864-8161
- Radon@vdh.virginia.gov
- Licensing of radon professionals
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
Harrisonburg city, Questions
Questions about radon in Harrisonburg city
Are radon levels high in Harrisonburg city?
Over the 2008 to 2017 laboratory totals, 33.4% of the radon tests reported to CDC for Harrisonburg city, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.4 pCi/L. Of 84 Virginia counties with 30 or more tests for the same period, 46 reported a higher share; pooled, the state comes to 30.4%.
Which counties border Harrisonburg city?
Harrisonburg city borders 1 county: Rockingham County.
Products
Harrisonburg city, Products
Testing a home in Harrisonburg city
In Harrisonburg city, 33.4% of 599 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.4% pooled across Virginia. In Zone 1 the year-round level in Harrisonburg city is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.
Test kits and monitors3
See every kit and monitorMonitorSafetySiren
Pro4 plug-in radon detector with a display and alarm
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 48 hours
Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Harrisonburg city is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Harrisonburg city
Explore
Harrisonburg city, Bordering counties
Counties bordering Harrisonburg city
Calculated by Radon411- Radon levels in Rockingham CountyEPA zone 1
43.9%at or above 4 pCi/L
Median 3.3 pCi/L · 1,714 tests · 10.5 points above Harrisonburg city
Harrisonburg city, Cities and towns
Cities and towns in Harrisonburg city
About 50,839 people live in Harrisonburg city by the Census Bureau's estimate for July 1, 2025, 859 fewer than in 2020 (−1.7%). Packed into its land, that is 2,932 people per square mile. Harrisonburg, its one incorporated place, has 50,839 residents, 100.0% of the total. Testing is reported here more often than across the state: CDC's 599 reported tests for 2008 to 2017 come to 11.8 for every 1,000 residents (2025 estimate), against 6.0 for Virginia.
Harrisonburg is the one incorporated place here; CDC publishes no figure by town, so it reads Harrisonburg city's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Harrisonburg | 50,839 | −1.7% | 100.0% |
One incorporated place, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
Harrisonburg city, Homes
Homes in Harrisonburg city
Fewer than six in ten of Harrisonburg city's 18,654 homes are detached houses (38%, against 61% across Virginia); the rest are attached, in shared buildings or mobile. Half of its homes were built before 1987, close to Virginia's 1984: 17% date from before 1960 and 29% from 2000 or later. Most occupied homes here are rented: owners live in 40% (Virginia: 67%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Harrisonburg city | Virginia |
|---|---|---|
| Housing units | 18,654 | 3,654,784 |
| Detached houses | 38% | 61% |
| In buildings of 5 or more | 27% | 19% |
| Mobile homes | 1% | 4% |
| Built before 1960 | 17% | 19% |
| Built since 2000 | 29% | 25% |
| Middle year built | 1987 | 1984 |
| Owner-occupied | 40% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.