Radon mitigation across DuPage County

Who is licensed to do this work in DuPage County

Illinois does not leave this to guesswork, and neither should you. IEMA-OHS licenses radon mitigation professionals for the whole state and publishes the active list itself — no account, no fee, no intermediary. It is the same list a search engine returns above the review sites, and it is the only list of DuPage County mitigation supply that nobody paid to appear on.

• Search IEMA’s active licensee register — filter by licence type: mitigation and by service county or city to see who covers DuPage County.
• IEMA’s printable mitigation licensee list for Du Page County — the whole county on one page, useful if you want to work down it methodically.

Source: IEMA-OHS Radon Tracking System. Register locations last confirmed 2026-08-18. The register is live and the state’s; anything reprinted from it on this site carries the date it was last checked, and the register wins wherever the two disagree.

The 44 mitigation professionals on IEMA’s DuPage County list

Reprinted from the state’s county print list, last checked 2026-09-07, in the register’s own order. The list is whoever has told IEMA they serve DuPage County, and 5 of them are based outside Illinois. The licence number is the thing to quote back when you ask for a bid, and the thing to check on the register before you sign.

38 licensed mitigation technicians also appear on the DuPage County list. They work under one of the professionals above and cannot take a job on their own, so they are counted here rather than listed. Where the phone column reads “on the register”, the address IEMA holds for that licensee is not plainly business premises, so neither it nor the number is reprinted here; the register link above carries both. Source: IEMA-OHS county print list, retrieved 2026-09-07. Nobody on it has any relationship with Radon Connect. A licensee who wants an entry corrected or removed can tell us, and it is actioned against the next weekly import.

What a listing does and does not tell you

• It shows who currently holds an Illinois mitigation licence — not who is good, insured, available, or priced fairly.
• A licence covers a person or business, not a specific job. Confirm the licence you were quoted by is the one doing your work.
• Measurement and mitigation are separate Illinois licences. The list linked here is the mitigation list.
• Nobody on it has any relationship with Radon Connect. We do not place, rank, endorse, or receive anything from the businesses Illinois licenses.

So the register narrows the field; it does not pick for you. Ask every business you shortlist for its licence number and check it yourself — that habit is your protection, and how Illinois radon licensing works, and how to verify a number walks through it. When the quotes arrive, compare them on the eight lines that actually differ rather than the total at the bottom.

Prefer not to work the list yourself? Tell us the reading and the postcode and we will check coverage before asking for a single contact detail — start a request, and the confirmation tells you exactly what happened to it, including when the answer is that nobody covers you yet.

Radon in DuPage County, without the mythology

Radon in DuPage behaves as it does across northern Illinois: it varies house by house, driven by the soil under each foundation rather than by municipality. EPA recommends every home be tested regardless of location, recommends action at 4 pCi/L, and suggests considering action between 2 and 4. IEMA-OHS licenses the professionals who measure and mitigate statewide — no DuPage community adds or subtracts from those rules.

What licensed tests have actually found here, ZIP by ZIP, is published as radon test results by ZIP code for DuPage, Kane and Will — the state’s own reported measurements, aggregated; a table about neighbourhoods, never a prediction for one house.

Transactions here

DuPage’s transaction volume means most local radon decisions happen on contract clocks. Illinois’ Radon Awareness Act makes radon a disclosure item in home sales — sellers provide the state pamphlet and disclose known elevated results — while leaving any fix to negotiation. County-wide, the working pattern is stable: buyer tests during inspection, parties price the response with a written quote, and closings proceed.

Before collecting numbers, what radon mitigation costs in general sets out the commonly quoted ranges by home type and the six factors that move a quote, and the mechanics of a mitigation system explains what those numbers buy — suction point, pipe, fan, manometer, and the verification retest.

City guides in this territory

Full coverage in DuPage

Published city pages: Naperville, Wheaton, Downers Grove, Glen Ellyn, and Lombard. Territory coverage additionally routes Addison, Bensenville, Bloomingdale, Carol Stream, Clarendon Hills, Darien, Elmhurst, Glendale Heights, Hinsdale, Itasca, Lisle, Oak Brook, Roselle, Villa Park, Warrenville, West Chicago, Westmont, Winfield, Wood Dale, and Woodridge ZIP codes.

Not sure about your ZIP? The quote form resolves it instantly and honestly.

Suburban Chicagoland guides

• Radon Mitigation in Suburban Chicagoland
• Radon Testing in Suburban Chicagoland
• Radon Mitigation Cost in Suburban Chicagoland
• Failed Radon Test in Suburban Chicagoland
• Radon System Installation in Suburban Chicagoland