Radon Connect
Learning centre

State regulations

What does my state actually require?

Federal guidance recommends. States regulate, or do not. That split explains most of the confusion in this subject: a homeowner reads a national recommendation, assumes it is a requirement, and then finds a contractor who is not licensed because their state does not license anyone.

The state resource centres are the destination here. Each one names the agency, the licensing regime, the disclosure position, and the official listings, with the authority for each. This hub is the map to them.

Who this is for. Someone who has been told radon is regulated and wants to know what that means where they live.

The reading order

5 steps, 12 resources. Nothing below is written here — every link goes to the page that holds the substance, and the note under each one says what it adds at that point in the sequence. A hub that restated its own links would just be competing with them.

  1. See the variation as a whole first

    The differences are structural rather than incidental, and a state-by-state view makes the pattern obvious before you look up your own.

    • State Radon Regulatory Index Dataset

      Every state we cover, with licensing posture and disclosure position as structured data and the authority for each row.

    • State certification differences Guide

      Why two neighbouring states can hold opposite positions on whether anyone needs a licence.

    • Who licenses radon work Newsroom

      The map read as a story: which regimes are strict, which are absent, and what that means for a homeowner hiring across a state line.

  2. Then your own state

    Each resource centre carries the agency, the programme, the credential path, disclosure guidance, and links to the official listings.

    • All state resource centres Page

      All ten state resource centres in one index. Start here if your state is covered.

    • Illinois resource centre State

      The most fully documented, because Illinois licenses both measurement and mitigation and has a disclosure statute we can cite directly.

    • Iowa resource centre State

      Worth reading alongside Illinois as a contrast in how a neighbouring programme is structured.

    • Radon Connect Coverage Index Dataset

      Which markets and cities this platform actually serves, published so the boundary of our own coverage is checkable rather than implied.

  3. Sale and disclosure requirements

    Disclosure obligations are narrower than most sellers assume, and they concern what is known rather than what could be found out.

  4. New construction

    Passive provisions in model code reach states unevenly, and a built-in pipe is not the same thing as a result.

  5. When the rules change mid-project

    Regimes do change, and a homeowner with a signed contract and a half-installed system needs to know what that does to them.

What you should be able to do afterwards

  • Say whether your state licenses radon professionals, and what to do if it does not.
  • Find the official licensee list for your state rather than a directory that resembles one.
  • Describe your disclosure obligation without overstating it.
  • Explain why a new house with a passive pipe still needs a measurement.

Related hubs

Confidence and limits of this page

Every decision resource on this platform states its own boundaries. This is not a disclaimer — it is the part of this hub you should read before relying on it.

What we knowClaims on this page we stand behind, each traceable to an approved source or to observable structure.
  • Federal radon guidance is recommendation rather than requirement, and regulation of measurement and mitigation professionals is a state matter.
  • Illinois requires licensing of measurement and mitigation professionals and requires specific disclosure on residential sales, under the statutes cited here.
  • Adoption of radon-resistant new-construction provisions varies by state and by local jurisdiction rather than following one national rule.
What we do not knowQuestions you may reasonably have that this page does not answer.
  • The present text of every state regulation we describe, since regimes change and this build environment cannot reach the publishing agencies to re-read them.
  • Local ordinance layered on top of state rule, which exists in some jurisdictions and is not published in any single place we could cite.
What research would settle itWhat it would actually take to answer the above — naming it is the difference between honesty and hedging.
  • A systematic re-read of each state statute and rule on a fixed schedule, which is the maintenance commitment our editorial standards describe and which requires network access to perform.
  • A survey of local ordinances, which would need primary collection from municipalities rather than from state sources.
What we do not claimClaims you might expect to find here and will not, with the reason.
  • We do not give legal advice, and nothing on this platform substitutes for counsel licensed in your state.
  • We do not claim any state requires testing or mitigation on a sale unless we cite the statute that says so.
  • We do not claim a state regime is current as of today, only as of our stated review date, because a regime can change without our knowing.
What we cannot independently verifyFacts this page relies on that we could not confirm ourselves.
  • Whether a statute we cite has been amended since our review date, for the network reason stated in our methodology.
  • Whether a state licensee list is up to date at the moment you read it, which only the issuing agency can confirm.

Sources

  1. IEMA-OHS — Illinois Emergency Management Agency and Office of Homeland Security — Radon Program
  2. Illinois General Assembly — Radon Industry Licensing Act (420 ILCS 44)
  3. Illinois General Assembly — Illinois Radon Awareness Act (420 ILCS 46)
  4. U.S. EPA — Radon

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