Locations and reports
Radon in Lewiston, New York
EPA puts Niagara County, where Lewiston is, in Zone 2, its middle radon zone, and only 9 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
14.3%
10.2 pts below NY
- Niagara
- 14.3%
- New York
- 24.5%
Niagara, 50th of 61 in NY, 2008 to 2017
Median result
1.6pCi/L
Below action level
- Niagara
- 1.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Niagara's tests, 2008 to 2017
Nearest county
18.2%
Erie, 32 miles
- Erie
- 18.2%
- Niagara
- 14.3%
13,822 tests, 2008 to 2017
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
Niagara, where Lewiston is
Tests reported
2,016
In Niagara
- Niagara
- 2,016
- Erie
- 13,822
Reported to CDC before any fix, 2008 to 2017
Read a result for Lewiston
Starts at Niagara County's median, 1.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.6 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Niagara County's median reported result, 2008 to 2017.
The data
Lewiston, What is published
What is published for Lewiston
Every figure for Lewiston is a county's
Radon data is published by county, not by city, so for Lewiston it is Niagara County's: its EPA zone (Zone 2) and the 9 tests reported to CDC for 2023. Only a test tells you about one home.
Lewiston covers 1.1 square miles of land, all of it in Niagara County. About 2,492 people live there, 2,272 to the square mile.
Lewiston, Counties
The county Lewiston lies in
MeasuredNiagara County's EPA zone and the figures CDC publishes for it, 2023.
Niagara CountyZone 2Moderate predicted potential
- 11.1%
- Reported tests at or above 4 pCi/L
- 1.2 pCi/L
- Median reported result
- 9 tests
- Tests reported to CDC
- 10
- Annual years on file
Niagara County ranks 50th of 61 New York counties with 30 or more tests for that period, 13.4 points below the 24.5% pooled across New York's counties, 24.6 points below the national pool of 35.7%.
The counties nearest Lewiston with a CDC figure for 2008 to 2017, laboratory, measured from the middle of the city: Erie County (32 miles, 18.2% of 13,822 tests), Orleans County (41 miles, 24.5% of 143 tests) and Genesee County (44 miles, 34.7% of 317 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 15.1% to 40.6%; the farthest of them, Livingston County, is 71 miles away at 38.3%.
No business in the directory gives Lewiston as its address; the New York list covers it. New York's other cities with a page of their own: Syracuse, Binghamton, Rochester and Ithaca.
The counties around Lewiston
By distance from the middle of Lewiston; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2023.
Lewiston, Geology
The ground under Lewiston
PredictedUSGS's geologic map puts all of Lewiston's mapped land in one class: moderate radon potential. 89.8% of it lies in the area the map calls Erie-Ontario Lowland, to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Erie-Ontario Lowland | Limestone, dolomite, shale, sandstone, and salt deposits. | Moderate | 9 | 89.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lewiston beside its county and New York
The ground under Lewiston is close to Niagara County's as a whole: 89.8% rated moderate against 98.7%. Across New York 48.9% of the land is rated high; none of Lewiston's is.
The map rates the ground, not the air in any home.
Lewiston, Homes
Homes in Lewiston
Of Lewiston's 1,432 homes, 56% are detached houses, against 68% across Niagara County; 24% are in buildings of five or more homes. Half of its homes were built before 1960, close to Niagara County's 1958: 51% date from before 1960 and 7% from 2000 or later. 58% of occupied homes are lived in by their owner (Niagara County: 71%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Lewiston | Niagara County | New York |
|---|---|---|---|
| Housing units | 1,432 | 100,335 | 8,539,536 |
| Detached houses | 56% | 68% | 41% |
| In buildings of 5 or more | 24% | 12% | 34% |
| Mobile homes | 0% | 4% | 2% |
| Built before 1960 | 51% | 54% | 53% |
| Built since 2000 | 7% | 9% | 12% |
| Middle year built | 1960 | 1958 | 1958 |
| Owner-occupied | 58% | 71% | 54% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
Lewiston, Local resources
Local resources for Lewiston
Who to ask in New York: its radon program, test kits and professionals.
- Radon ProgramRun by New York State Department of Health, phone 518-402-7556.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Providing patients with information about how low-cost test kits may be obtained from the Radon Program.
- Compare kits
- Professionals in New YorkRadon testers and mitigators in New York, each with how its listing was checked.
The program's own words on licensing are on the New York page.
What it means
Lewiston, Questions
Questions about radon in Lewiston
What radon zone is Lewiston in?
Lewiston has no zone of its own: it shares Niagara County's, Zone 2, the map's middle class: a predicted county average of 2 to 4 pCi/L.
What are radon levels in Lewiston?
Only 9 tests from Niagara County are on file with CDC for 2023, 11.1% of them at or above 4 pCi/L: too few to say how Lewiston runs.
Should I test my home in Lewiston?
Yes. With no dependable count of tests for Niagara County, a test of your own is the only reading there is; a short-term kit takes a few days. How to test a home.
What ground is Lewiston built on, as far as radon goes?
USGS's geologic map puts 89.8% of Lewiston on one named area, "Erie-Ontario Lowland", rated moderate for radon potential, radon index 9.
Is radon higher in the counties around Lewiston?
Yes, in every direction measured. Each of the 8 nearest counties with a figure reports a larger share of high tests than Niagara County's 11.1%; the highest is Cattaraugus County (40.6%, 66 miles off).
The answers use the published figures of Niagara County, the county Lewiston lies in.
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