Radon Testing in Milwaukee

Updated October 2026 · 5 public sources cited

Milwaukee-area homeowners can order a $10 radon kit from the Southeastern Wisconsin Radon Information Center online, by phone or in person. Here's how testing works and what to do with the result.

How to get a kit

• Online through Waukesha County's order page. Mailed kits go out within two business days.¹
• In person at Waukesha County Environmental Health, Room AC 260 of the Courthouse, 515 W. Moreland Blvd., Waukesha.¹
• By phone with a credit or debit card. For phone orders, the county asks you to supply postage stamps for mailing the kit to the lab.¹
• Stores: the county notes kits are also sold at hardware stores and supermarkets, and DHS says they run $10–$30.¹²

Short-term first, then follow up

The center uses short-term kits as the initial screening test and long-term kits only for follow-up.¹ Its flowchart says follow-up tests belong in the lived-in part of the house: if you don't spend much time in the basement, test the first floor.³ If your first result is over 20 pCi/L, Milwaukee, Racine and Waukesha County residents can ask for two free short-term follow-up kits.³

Does a digital monitor count?

DHS says consumer digital monitors average $100–$200, and most aren't NRPP- or NRSB-approved because they can't be calibrated.² They're fine for watching trends. For a mitigation decision, DHS recommends an approved device or a radon contractor.²

When to test

Waukesha County calls January, when homes are closed up for winter, an ideal time to test.⁴ Keep windows and outside doors closed during a short-term test.⁵

What your result means

• 8 pCi/L or higher: DHS says to run a second short-term test right away. If the two average above 4, it recommends hiring a contractor.²
• Confirmed above 4.0: EPA recommends a mitigation system, per the regional center.³
• Between 2 and 4: EPA suggests considering a fix, since any radon carries some risk.⁵

Please note: Wisconsin doesn't license radon contractors, and the state health department recommends NRPP or NRSB national certification. This page is general information summarized from public agencies, not professional advice. For advice about your home, talk with a nationally certified radon professional.