Listed for: TestingMitigation
Verified:Pennsylvania state license
Call Integra Environmental LLC at (610) 346-8004No website listed
Locations and reports
Radon in Allentown, Pennsylvania
EPA puts Lehigh County, where Allentown is, in Zone 1, its highest radon zone, and 39.8% of its 3,103 reported radon tests (2020) 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
39.8%
9.5 pts above PA
- Lehigh
- 39.8%
- PA
- 30.3%
Lehigh, 31st of 63 in PA, 2020
Median result
2.7pCi/L
Below action level
- Lehigh
- 2.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Lehigh's tests, 2020
Nearest county
41.3%
Northampton, 14 miles
- Northampton
- 41.3%
- Lehigh
- 39.8%
3,434 tests, 2020
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
Lehigh, where Allentown is
Tests reported
3,103
In Lehigh
- Lehigh
- 3,103
- Northampton
- 3,434
Reported to CDC before any fix, 2020
Read a result for Allentown
Starts at Lehigh County's median, 2.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.7 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. Lehigh County's median reported result, 2020.
The data
Allentown, What is published
What is published for Allentown
Information:
Every figure for Allentown is a county's
Radon data is published by county, not by city, so for Allentown it is Lehigh County's: its EPA zone (Zone 1) and the 3,103 tests reported to CDC for 2020. Only a test tells you about one home.
Allentown covers 17.6 square miles of land, all of it in Lehigh County. Its 126,044 residents live 7,180 to the square mile.
Allentown, Counties
The county Allentown lies in
MeasuredLehigh County's EPA zone and the figures CDC publishes for it, 2020.
Lehigh CountyZone 1Highest predicted potential
- 39.8%
- Reported tests at or above 4 pCi/L
- 2.7 pCi/L
- Median reported result
- 3,103 tests
- Tests reported to CDC
- 7
- Annual years on file
Lehigh County ranks 31st of 63 Pennsylvania counties with 30 or more tests for that period, 9.5 points above the 30.3% pooled across Pennsylvania's counties, 14.3 points above the national pool of 25.5%.
Measured from the middle of Allentown, the nearest counties with a CDC figure for 2020 are Northampton County (14 miles, 41.3% of 3,434 tests), Carbon County (25 miles, 40.6% of 438 tests) and Bucks County (26 miles, 23.2% of 7,066 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 10.6% to 53.5%; the farthest of them, Philadelphia County, is 44 miles away at 10.6%.
The directory lists 3 businesses with an address in Allentown, 1 for testing and 3 for mitigation. Pennsylvania's other cities with a page of their own: Pittsburgh, Scranton, Harrisburg and Malvern.
The counties around Allentown
By distance from the middle of Allentown; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2020.
Allentown, Geology
The ground under Allentown
PredictedUSGS's geologic map puts all of Allentown's mapped land in one class: high radon potential. The map puts 60.8% of Allentown in the area it calls Great Valley Section and 39.2% in New England Province/Reading Prong. USGS gives both 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 |
|---|---|---|---|---|
| Great Valley Section | Sandstone, shale and siltstone. | High | 15 | 60.8% |
| New England Province/Reading Prong | Granitic gneiss. | High | 15 | 39.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Allentown beside its county and Pennsylvania
All of Allentown, like all of Lehigh County, is rated high. Allentown has more high-potential ground than Pennsylvania as a whole: 100% of its land against 70.4%.
The map rates the ground, not the air in any home.
Allentown, Homes
Homes in Allentown
Fewer than six in ten of Allentown's 49,211 homes are detached houses (25%, against 50% across Lehigh County); the rest are attached, in shared buildings or mobile. The homes are older than Lehigh County's as a whole: half were built before 1951 (1968 for Lehigh County), and 64% date from before 1960. Most occupied homes here are rented: owners live in 42% (Lehigh County: 65%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Allentown | Lehigh County | Pennsylvania |
|---|---|---|---|
| Housing units | 49,211 | 150,547 | 5,779,663 |
| Detached houses | 25% | 50% | 57% |
| In buildings of 5 or more | 23% | 16% | 13% |
| Mobile homes | under 1% | 2% | 4% |
| Built before 1960 | 64% | 42% | 45% |
| Built since 2000 | 8% | 16% | 14% |
| Middle year built | 1951 | 1968 | 1965 |
| Owner-occupied | 42% | 65% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
Allentown, Professionals
Radon professionals listed in Allentown
Businesses whose listed city is Allentown, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.
Radon professionals listed in Allentown: 1 of 3
3 listings with Allentown as the city. See radon mitigation and testing in Allentown, or all radon professionals in Pennsylvania.
Allentown, Local resources
Local resources for Allentown
Who to ask in Pennsylvania: its radon program, test kits and professionals.
- Radon DivisionRun by Department of Environmental Protection, phone 800-237-2366.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Through an EPA-funded program, hospitals give parents of newborn children a packet of information which includes a coupon for a free radon test kit from the DEP.
- Compare kits
- Professionals in Pennsylvania3 listings cover Allentown.
The program's own words on licensing are on the Pennsylvania page.
What it means
Allentown, Questions
Questions about radon in Allentown
What radon zone is Allentown in?
Allentown takes its zone from Lehigh County, which EPA puts in Zone 1, the map's highest class: a predicted county average above 4 pCi/L.
What are radon levels in Allentown?
Around Allentown, 39.8% of 3,103 tests reported from Lehigh County for 2020 reached 4 pCi/L or more, so a high result is no surprise here. The median reported result was 2.7 pCi/L.
Should I test my home in Allentown?
Yes. Lehigh County reported about 1,235 of its 3,103 tests at or above 4 pCi/L. That is above Pennsylvania's pooled 30.3%, and ranks Lehigh County 31st of the 63 Pennsylvania counties with 30 or more tests. Which homes they were, no map can say. How to test a home.
What ground is Allentown built on, as far as radon goes?
60.8% of Allentown sits on what USGS's map calls "Great Valley Section", rated high for radon potential, radon index 15; another 39.2% is "New England Province/Reading Prong", in the same class.
Is radon higher in the counties around Allentown?
It depends which way you go. 3 of the 8 nearest counties with a figure report a larger share than Lehigh County's 39.8% and 5 a smaller one: from Philadelphia County (10.6%, 44 miles off) to Schuylkill County (53.5%, 40 miles off).
Who tests for or fixes radon in Allentown?
Allentown is the address of 3 businesses in Radon411's directory, 1 listed for testing and 3 for mitigation. Each entry names the public list it came from. Radon professionals in Allentown.
The answers use the published figures of Lehigh County, the county Allentown lies in.
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