Local testing decision
Radon Testing in Ulster County, NY
Ulster County has enough measured elevation that the answer should not stop at the EPA zone. 24.4% of reported tests at or above 4.0 pCi/L, 3.8 pCi/L primary measured result, and 22.0 pCi/L high-end signal makes a first test or confirmatory retest the right next step before cost decisions.
Direct answer
Ulster County is elevated enough that map-reading should turn into a home test.
Ulster County has enough measured elevation that buyers and owners should not stop at the county signal; confirm the home and price mitigation if the result crosses 4.0.
Evidence
Official county measurements
Primary signal
3.8 pCi/L
Reported tests
26.2 avg/year
What this evidence can and cannot tell you
Ulster County, NY has more than the EPA map: NY DOH exposes 131 reported tests, 3.8 pCi/L county average, 24.4% of reported tests at or above 4.0 pCi/L, and 22.0 pCi/L high-end signal for 2015-2019.
Ulster County, NY is measurement-backed for 2015-2019. The measured average is 3.8 pCi/L, and 24.4% of reported results are at or above 4.0 pCi/L. The high-end signal reaches 22.0 pCi/L.
Your next test decision
No reading yet: run a short-term test now, then confirm or price mitigation quickly if the result is elevated.
Retest trigger: a 2.0-3.9 pCi/L home result should be confirmed here because 3.8 pCi/L average, and 24.4% of reported tests at or above 4.0 keeps the county from being a dismiss-it signal.
Move from a test result to a local plan
Use the result band, foundation type, and county cost range together. A county signal is context; the home's own test controls the decision.
Sources