Quick Answer
Radon is colorless and odorless, so the only way to know a home's level is to test for it. Many Central Indiana buyers add radon testing to their home inspection, since parts of the state are known for elevated readings.
- Typical test length
- 2 to 7 days
- Who orders it
- Usually the buyer, during the inspection period
- EPA action level
- 4.0 pCi/L or higher
- Fix if needed
- A mitigation system, often vented through the roof
Why Radon Testing Matters in Indiana
Radon comes from uranium breaking down in soil and rock, and levels vary block by block, not just county by county. A neighboring home testing low doesn't guarantee the same result next door, which is why buyers test each individual property rather than relying on general area reputation.
Because it's invisible and odorless, radon is easy to overlook without a dedicated test. It's a separate service from a general home inspection, though the two are commonly scheduled together during the same visit.
How the Test Works and What Happens With a High Reading
A small monitor sits undisturbed in the lowest livable area of the home, usually the basement, for several days while doors and windows stay closed as much as possible. The results come back as a number in picocuries per liter (pCi/L).
If the reading comes back elevated, it doesn't mean the deal falls apart. Buyers often use it as a point of negotiation, asking the seller to install or pay for a mitigation system that vents the gas safely outside. Many Central Indiana homes already have one installed from a prior sale.
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Frequently Asked Questions — Radon Testing
Is radon testing required in Indiana?
No, it's not legally required, but it's a common and inexpensive addition to the inspection period, especially since radon is prevalent in parts of the state.
How much does radon testing cost?
It's typically a modest add-on to a standard home inspection, well below the cost of most other inspection services.
Does every home need a mitigation system?
No. Many homes test well below the action level. A system is only recommended when the reading meets or exceeds the EPA's guidance.
Can I test for radon myself?
Yes, DIY kits exist, but most buyers use a certified inspector during the contingency period so the results carry weight in negotiations.