Updated November 2026 · Data: New York State Department of Health radon test results by town (updated November 2025) · Sources and method
The New York State Department of Health (NYSDOH) has radon results for 1,472 homes in Union (Broome County) tested with state test kits. In basements, 30.2% of 1,182 tests were at or above the EPA action level of 4 pCi/L, with an average of 3.86 pCi/L. That share is lower than the Broome County figure of 37.3% (New York, 58 counties: 36.1%).
These are area results, not your home’s level. Homes next to each other can have very different radon levels. The only way to know yours is to test.
Radon test results in Union by floor
| Floor tested | Homes tested | Average (pCi/L) | At or above 4 pCi/L | At or above 20 pCi/L | Highest (pCi/L) |
|---|---|---|---|---|---|
| Basement | 1,182 | 3.86 | 30.2% | 2.1% | 55.7 |
| 1st Floor | 290 | 1.92 | 10.7% | 0.0% | 17.8 |
How Union compares
| Area | Basement tests | At or above 4 pCi/L |
|---|---|---|
| Union | 1,182 | 30.2% |
| Broome County | 3,458 | 37.3% |
| New York (58 counties) | 84,677 | 36.1% |
How to test your home in Union
- NYSDOH sells short-term charcoal test kits to residents; use the kit order form (DOH-2247) or call 518-402-7556.
- Place the kit in the lowest lived-in level with windows and doors closed.
- If the result is 4 pCi/L or higher, the EPA recommends fixing the home; between 2 and 4 pCi/L, consider a fix.
- Hire an NRPP- or NRSB-certified mitigator. See typical prices in our radon mitigation cost guide.
More results nearby: Radon in Broome County · Radon in New York.
Frequently asked questions
Is radon a problem in Union, NY?
30.2% of basement radon tests in Union were at or above 4 pCi/L in NYSDOH data. Any home can have high radon, so testing is the only way to know.
What is the average radon level in Union?
The average basement result is 3.86 pCi/L and the average first-floor result is 1.92 pCi/L, based on NYSDOH test kits.
Sources and method
Data come from short-term charcoal kits that NYSDOH provides to residents; tests by private companies are not included. “Town” is the town, village or city recorded in the state database. Percent at or above 4 pCi/L = tests from 4 to 20 pCi/L plus tests at or above 20 pCi/L, divided by homes tested. Retrieved November 2026.