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Radon Levels in Union County, Pennsylvania

EPA puts Union County 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

Predicted
Zone 1Highest predicted potential
Measured
44.5%of 182 tests reported to CDC (2020) were at or above 4 pCi/L
Your home
Test to knowNo area figure here is a reading of your home.
How to test this homeFind a certified tester

The data

Union County, At a glance

Union County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

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.

What EPA predicts hereScreening level, geology

EPA predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county as a whole.

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 Union County, 2020

Tests reported
182
At or above 4 pCi/L
44.5%
Median result
3.3 pCi/L
Reported results by concentration band, Union County, 2020
Under 2 pCi/L: 32%2 to 4 pCi/L: 23%4 pCi/L and above: 45%

Of 182 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Union County, 2020: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L5932.4%
2 to 4 pCi/L4223.1%
4 pCi/L and above8144.5%

CDC publishes this figure only for counties here, so there is no state or national number to compare Union County, Pennsylvania with.

What these figures count

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 2020: a percentage there is a share of radon tests reported to CDC for Union County in 2020, 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 Union County, 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 (182 for 2020). The median is the middle result of those tests, not of buildings. CDC also reports the number of buildings tested (145), a different count, so the two totals are not interchangeable.

Union County'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 2020, counting radon tests reported to CDC, not homes. Union County 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 Pennsylvania county’s own figure is in the Pennsylvania county table.

Measured: CDC tracking data. Figure above: 2020. Measured data period: 2005 to 2020 (every CDC figure on file).

Union County, State data

Pennsylvania's own radon test data

Measured

What Pennsylvania's own agencies publish about radon tests in Union County, with their period. These are not CDC's figures and are never added to them.

MeasuredState figures, not CDC's

What Pennsylvania DEP reports for the ZIP codes in Union County

Pennsylvania DEP publishes its figures by ZIP code, not by county. These are the 13 ZIP codes that lie wholly or partly in Union County, each with the state's own figures for it. Period: Period not stated by DEP.

ZIP codes in Union County
ZIP codeWhat the state reports
17810Basement: average 6.2 pCi/L, 112 tests; First floor: figures not shown
17829Basement: figures not shown; First floor: figures not shown
17835Basement: figures not shown; First floor: figures not shown
17837Basement: average 7.4 pCi/L, 4,696 tests; First floor: average 3.3 pCi/L, 646 tests
17844Basement: average 11.9 pCi/L, 1,122 tests; First floor: average 2.5 pCi/L, 274 tests
17845Basement: average 13.3 pCi/L, 68 tests; First floor: average 2.5 pCi/L, 30 tests
17855Basement: average 8.3 pCi/L, 124 tests; First floor: average 2.9 pCi/L, 36 tests
17856Basement: average 9.9 pCi/L, 364 tests; First floor: average 3.3 pCi/L, 38 tests
17870Basement: average 9.7 pCi/L, 2,373 tests; First floor: average 4.7 pCi/L, 363 tests
17885Basement: figures not shown; First floor: figures not shown
17886Basement: average 9.4 pCi/L, 102 tests; First floor: figures not shown
17887Basement: figures not shown; First floor: figures not shown
17889Basement: average 19.8 pCi/L, 581 tests; First floor: average 16.2 pCi/L, 62 tests
  • DEP's report gives the number of tests, the highest result and the average result for each floor tested; it states no period.
  • DEP says the smartest thing to do is to test your home for radon, no matter where you live.
  • A ZIP code that crosses the county line is listed whole; its figures cover all of it.

Measured: Pennsylvania DEP data, Period not stated by DEP.

Radon Action Brief

National Radon Action MonthPre-sale

Union County's radon brief, in one dated file.

  • Your area's radon record, explained.
  • Your plan to test this week.
  • Fix costs and pros near you.

Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25

Get the Union County BriefSee a free sample

Area data, not a test of the building.

Local help

Union County, Local resources

Radon testing and mitigation in Union County

Who tests and fixes radon in Union County: listed businesses, Pennsylvania's radon program and test kits.

What Pennsylvania's program says
Phone
800-237-2366
Licensing of radon professionals
The Radon Certification Act requires DEP to establish by regulation, a certification program for persons conducting radon gas and radon progeny testing, laboratory analysis and mitigation...

What it means

Union County, Questions

Questions about radon in Union County

Common questions

8 questions, answered from the figures above

Are radon levels high in Union County?

In 2020, 44.5% of the radon tests reported to CDC for Union County, Pennsylvania 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 Union County 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 Pennsylvania

How do I get a radon test in Union County?

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 Union County or names it as a service area yet. The Pennsylvania 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 checklistPennsylvania radon program

Who does radon mitigation in Union County?

No listed mitigator names Union County as a service area yet; the Pennsylvania directory lists 153 companies. 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 Pennsylvania requires one.

Radon mitigation: how it worksRadon mitigation costRadon mitigation systemsMitigators in Pennsylvania

What EPA radon zone is Union County in?

EPA places Union County, Pennsylvania 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.

Should I test my home in Union County?

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.

When is the best time of year to test?

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.

What does it cost to test?

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.

Which counties border Union County?

Union County borders 6 counties, derived from Census county geometry. Radon potential follows geology rather than county lines, so a bordering county's report can be relevant.

If you own, buy, sell or rent

What these figures mean for each reader, with the guide that covers it

The reported-test figures on this page describe Union County, Pennsylvania in 2020. They describe tests other people carried out in other buildings, and none of them measures yours.

Union County in figures

The figures above, said in words

What the published data says about Union County, in words. A zone and a share of tests describe an area, never the level in any one home.

    • Predicted

      Predicted

      EPA places Union County in Zone 1, highest predicted potential, as it does 48 other counties of Pennsylvania's 67.

      Of the 6 bordering counties, EPA places Centre County, Clinton County, Lycoming County, Mifflin County, Northumberland County and Snyder County in Zone 1.

  • Reported tests

    Measured

    CDC has annual figures for Union County for 7 years, 2014 to 2020. In 2020, 44.5% of 182 reported tests were at or above 4 pCi/L.

    Across those years the share ranged from 39.3% (2016) to 53.2% (2015). Few tests in a year can move it a long way.

  • Local record

    Pennsylvania's radon program is the Radon Division, run by Department of Environmental Protection; its contacts are under Local resources.

    The county's largest incorporated places are Lewisburg, Mifflinburg and New Berlin; the figures here cover them as part of the county.

Products

Union County, Products

Testing and mitigation products

Whatever the figures for Union County show, only a test tells you about one home.

Test kits and monitors42

See all products

As an Amazon Associate, Radon411 earns from qualifying purchases.

Union County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Union County

Testing

5

Mitigation

3

Explore

Union County, Bordering counties

Counties bordering Union County

Calculated by Radon411
Why bordering counties matter

6 counties share a boundary with Union County, 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.

Union County, Cities and towns

Cities and towns in Union County

The radon figures on this page are for Union County as a whole. They do not differ by city or town.

  • Lewisburg
  • Mifflinburg
  • New Berlin
  • Hartleton

4 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files.

Union County, Next steps

What to do next

  1. LearnKnow what radon isWhat radon is, how it gets indoors, and why a county zone is not a reading for your home.Learn about radon
  2. TestTest the building you live inShort-term or long-term, where the device goes, and closed-house conditions.How to test
  3. FixBring a high level downHow a mitigation system works, and the retest that confirms it.How mitigation works
  4. Find a proHire a certified professionalMeasurement and mitigation professionals by state, with their certifications.Find a professional

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.