Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Manassas Park city, Virginia
EPA puts Manassas Park city in Zone 1, its highest radon zone, and only 25 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
32.1%
Prince William County
- Prince William
- 32.1%
- Manassas city
- 14.0%
3 of 3 neighbours have 30+ tests, 2006 to 2015
Nearest county
14.0%
Manassas city, 3 miles
- Manassas city
- 14.0%
- Virginia
- 30.7%
Share at 4+ pCi/L, 107 tests, 2006 to 2015
Ground above low
100.0%
22.1 pts above Virginia
- Manassas Park city
- 100.0%
- Virginia
- 77.9%
Share of land USGS rates moderate or high potential
Tests reported
25
Too few for a share
- Manassas Park city
- 25
- Needed
- 30
2008 to 2017, laboratory
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Read a result for Manassas Park city
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.
The data
Manassas Park city, At a glance
Manassas Park city at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Manassas Park city in
USGS geologic potential: High across 78% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Manassas Park city, 2008 to 2017, laboratory
CDC holds 25 reported tests for Manassas Park city over the 2008 to 2017 laboratory totals, with a median of 1.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Manassas Park city beside the counties around it is how this page reads it.
What these figures count
Only 25 tests were reported to CDC for Manassas Park city over 2008 to 2017 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Manassas Park city, Compared
Manassas Park city radon figures, compared
Calculated by Radon411CDC's largest figure for Manassas Park city rests on 25 tests over the 2008 to 2017 laboratory totals, 5 of them at or above 4 pCi/L, so each test moves its share by 4.0 points and no rank or comparison is drawn from it. Results reached as high as 8.8 pCi/L, with a middle value of 1.4 pCi/L.
Of the counties bordering it, 3 have a figure over the 2006 to 2015 laboratory totals: Prince William County reported the largest share at or above 4 pCi/L, 32.1%, and Manassas city the smallest, 14.0%, with Fairfax County at 18.4% between. Farther out, Fairfax city (10 miles away) at 14.7%, Falls Church city (17 miles away) at 20.8% and Alexandria city (20 miles away) at 7.8% have figures too. Pooled across 132 Virginia counties, 30.7% of reported tests reached that level; across every county in the country with a figure, 36.3%.
Statewide for the same period, Russell County reported the highest share (68.5%) and Norfolk city the lowest (5.3%). EPA's 1993 map puts Manassas Park city in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 78% of the county's land high radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Manassas Park city, Geology
The ground under Manassas Park city
PredictedMost of the ground under Manassas Park city is one class on USGS's geologic map: 77.7% of its land is high radon potential, with 22.3% moderate. The map puts 77.7% of Manassas Park city in the area it calls Inner Piedmont and 22.3% in Mesozoic Basins. USGS gives the first a radon index of 12, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Inner Piedmont | Granite, pegmatites, granitic gneiss, schist and gneiss, slate, and phyllite. | High | 12 | 77.7% |
| Mesozoic Basins | Sandstone, siltstone and lacustrine black shale. | Moderate | 11 | 22.3% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Manassas Park city beside the ground around it
Manassas Park city has more high-potential ground than Virginia as a whole: 77.7% of its land against 47.9%. Of the 3 counties that border it, none has as large a share of high-potential ground; Fairfax County comes nearest at 61.1%.
The map rates the ground, not the air in any home.
Local help
Manassas Park city, Local resources
Radon testing and mitigation in Manassas Park 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
Manassas Park city, Questions
Questions about radon in Manassas Park city
Are radon levels high in Manassas Park city?
Over the 2008 to 2017 laboratory totals, 20.0% of the radon tests reported to CDC for Manassas Park city, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.4 pCi/L. Of the counties bordering it, 3 have a figure over the 2006 to 2015 laboratory totals: Prince William County reported the largest share at or above 4 pCi/L, 32.1%, and Manassas city the smallest, 14.0%, with Fairfax County at 18.4% between.
Which counties border Manassas Park city?
Manassas Park city borders 3 counties: Manassas city, Prince William County and Fairfax County.
Products
Manassas Park city, Products
Testing a home in Manassas Park city
No CDC figure names Manassas Park city; the nearest county with one, Manassas city (3 miles away), reported 14.0% of its tests at or above 4 pCi/L over the 2006 to 2015 laboratory totals, the only reading nearby until a test of this home. In Zone 1 the year-round level in Manassas Park 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 monitor
Monitor
Wave Plus battery radon and air quality monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Manassas Park city is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Manassas Park city
Explore
Manassas Park city, Bordering counties
Counties bordering Manassas Park city
Calculated by Radon411- Radon levels in Prince William CountyEPA zone 2
32.1%at or above 4 pCi/L
Median 2.4 pCi/L · 3,648 tests
- Radon levels in Fairfax CountyEPA zone 1
18.4%at or above 4 pCi/L
Median 1.5 pCi/L · 7,377 tests
- Radon levels in Manassas cityEPA zone 1
14.0%at or above 4 pCi/L
Median 1.9 pCi/L · 107 tests
Manassas Park city, Cities and towns
Cities and towns in Manassas Park city
About 16,560 people live in Manassas Park city by the Census Bureau's estimate for July 1, 2025, 601 fewer than in 2020 (−3.5%). Packed into its land, that is 5,458 people per square mile. Manassas Park, its one incorporated place, has 16,560 residents, 100.0% of the total. Reported testing is thin here: 25 tests over 2008 to 2017, or 1.5 for every 1,000 residents (2025 estimate), where Virginia as a whole comes to 6.0.
Manassas Park is the one incorporated place here; CDC publishes no figure by town, so it reads Manassas Park city's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Manassas Park | 16,560 | −3.5% | 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).
Manassas Park city, Homes
Homes in Manassas Park city
Fewer than six in ten of Manassas Park city's 5,525 homes are detached houses (43%, against 61% across Virginia); the rest are attached, in shared buildings or mobile. Much of Manassas Park city is recent building: 43% of its homes have gone up since 2000 and the middle year built is 1997, against 1984 for Virginia. 68% of occupied homes are lived in by their owner (Virginia: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Manassas Park city | Virginia |
|---|---|---|
| Housing units | 5,525 | 3,654,784 |
| Detached houses | 43% | 61% |
| In buildings of 5 or more | 20% | 19% |
| Mobile homes | 0% | 4% |
| Built before 1960 | 19% | 19% |
| Built since 2000 | 43% | 25% |
| Middle year built | 1997 | 1984 |
| Owner-occupied | 68% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.