Vermont Radon

Radon in Johnson, Vermont

Johnson is in Lamoille County. Here's what Vermont Department of Health test data shows for the town.[1]

93

locations tested with Health Department kits[1]

20%

of tested locations had results at or above 4.0 pCi/L (19 of 93)[1]

7%

of the town's 1,277 residences have tested[1]

What this means for your home

Elevated results have been found in Johnson, and statewide one in seven Vermont homes has elevated radon.[2] Town numbers can't predict your home's level: neighboring homes can have very different radon levels.[2] The Health Department recommends that all Vermont homes be tested.[3]

If your result is 4.0 pCi/L or higher, contact a certified radon mitigation contractor.[4] See Understanding your results.

Test your home

Start here

1. Order a test kit from the state lab

The Vermont Department of Health Laboratory sells radon test kits directly. The Health Department recommends a long-term test of 3 to 12 months, ideally including a heating season.[2]

  • Long-term radon in air kit (3 to 12 months), listed by the Lab as the recommended test: $25[5]
  • Medium-term kit (1 to 3 months): $25. Short-term kit (2 to 7 days): $50.[5]
  • Radon in water kit for well or spring water: $25[5]

Order from the Health Department Lab

Prefer the phone? Call 802-338-4736 or 800-660-9997 (toll-free in Vermont).[2] Prices as listed on the Lab's webstore when we checked; confirm when you order.

Also an option

2. A digital radon monitor

Continuous radon monitors are "active" devices: they need power and continuously measure and record radon levels. The EPA lists testing with a continuous monitor for at least 48 hours as one acceptable short-term option in a real estate transaction.[6]

A monitor does not replace the long-term test the Health Department recommends for knowing your home's typical level.[2]

Disclosure: monitor links are affiliate links. If you buy through one, Vermont Radon may earn a commission at no extra cost to you. The state lab kits above are not affiliate links.

Data: Vermont Department of Health, "Radon Risk in Vermont" map, town-level results, retrieved 2026-10-17.[1][3] "Tested" counts locations tested with Health Department radon test kits; "elevated" means a result at or above 4.0 pCi/L. The Health Department does not show rates for towns with fewer than 20 results, and neither do we.[3]

Other towns in Lamoille County

Sources

  1. Radon Risk in Vermont: test results by town (map data service), Vermont Department of Health. Checked 2026-10-17.
  2. Radon in Your Home, Vermont Department of Health. Checked 2026-10-17.
  3. Radon Risk in Vermont (interactive map), Vermont Department of Health. Checked 2026-10-17.
  4. Fixing Radon in Your Home (fact sheet, January 2024), Vermont Department of Health. Checked 2026-10-17.
  5. Radon Test Kits (Health Department Lab webstore), Vermont Department of Health Laboratory. Checked 2026-10-17.
  6. Home Buyer's and Seller's Guide to Radon (EPA 402/K-24/001, March 2024), U.S. Environmental Protection Agency. Checked 2026-10-17.