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Certified Radon Services Providers

Certified Radon Services Providers

The Radon Program certifies all radon service pr​​oviders operating in California. California law requires all radon professionals to be approved by either the National Radon Proficiency Program (NRPP) or National Radon Safety Board (NRSB). There are no professional groups that are currently exempt from this requirement, including Home Inspectors, Industrial Hygienists, Registered Environmental Assessors (REAs), and Licensed Geologists. 

The California Department of Public Health does not endorse or recommend any company or individual over another. As with any home service, you are advised to get more than one estimate. The lists below are not updated daily; to verify whether a service provider not listed here is certified, you can contact us via email for the mos​​t up-to-date information.

Testers

Professional testers can provide test results faster than using a do-it-yourself test kit. Use a professional tester during a real estate transaction. The​​y are also recommended for testing multi-family housing units, schools, non-residential buildin​​gs, and anytime you want quick results. The testers listed here have met their board requirements and are certified to operate in California.


​Certification Number​
N​a​​me​​
​Date Ex​pired​StatePhon​e
Num​ber
​114665-RMT
​Ahmad Mansour​
​10/31/2026
​California
​510-304-2249
​115061-RMP
​Aidan Ross
​4/30/2027
​California
​858-868-1929
​105206-RMP
​Alain Grissette
​2/28/2027
​California
​925-808-6700
108692-RMP
Alan Benavente 12/31/2006
California
818-822-6152
113855-RMP
Alexandria Miranda 7/31/2025 California
916-918-5397
​113912-RMP
​Alfredo Calderon
​07/31/2025
​California
​714-473-6859
114050-RMP Amanda Plagge 1/31/2026 Idaho 208-860-4150
109996-RMP Amy Peacock 11/30/2025 Colorado 913-484-1532
​25MS018-RMS
​Anahita Swingle
​3/31/2027
​California
​714-721-4111
​24MT032
​Andrew Carter
​11/30/2026
​California
​510-407-5421
111309-RMP
Angela Deason 6/30/2026 California 530-570-4382
​114313-RMP
​Annie Garcia
​4/30/2026
​Kentucky
​502-410-5000
24MS603
​Anthony Hamer
​7/30/2026
​Minnesota
​651-968-6394
​114595-RMP
​Anthony Trimble
​8/31/2026
​California
​925-316-5674
16ST015 Aref Chmaytelli 11/30/2026 California 310-576-7771
​115025-RMP
​Benjamin Schulte-Bisping
​4/30/2027
​California
​510-773-0708
​114900-RMP
​Baldwin Michael
​1/31/2027
​California
​279-336-0649
102253-RMP
Bonnie Kellogg 10/31/2025 California 510-786-9751
​113682-RMP
​Blake Seagraves
​5/31/2025
​Illinois
​847-690-0950
111057-RMP Bradley Cord 1/31/2026 Indiana 317-642-6094
108285-RMP Brandon Ford 3/31/2026 California 530-544-1862
112704-RMP Brandon Koka 3/31/2026 California 925 389-3787
113475-RMP Brandy Groves 1/31/2027
California 951-817-4670
113717-RMP Breanna Phan 4/30/2027
California 209-314-7353
111851-RMP Brett Brumbaugh 2/28/2025 Ohio 419-392-2011
23MT038 Brian Kim 10/30/2025 California 415-310-5067
113748-RMP Brooklynn Marcus 4/30/2027
California 310-294-0900
112263-RMP Cameron Dopke
9/30/2025 California 530-544-1862
​114586-RMP
​Carina Rodriguez
​8/31/2026
​California
​310-387-4901
9SS0048-RMS
Carol Noland 6/30/2025 California 805-214-6378
​RMP-114802
​Carolina Cortes
​12/31/2026
​Arizona
​480-886-4783
​24MT024-RMT
​Caroline Hanna
​9/30/2026
​California
​310-922-7239​
24MS044-RMS Chloe Hudson 5/30/2026 Oregon 971-275-3719
107105-RMP Christian Matecki 5/31/2025 California 602-663-2270
100318-RMP Christine Jordan 5/31/2026 California 562-495-5777
108809-RMP Christopher Ferguson 4/30/2026 Kentucky 317-3970-326
14306-RMP
Christopher Olsen 4/30/2026 California 831-262-8859
​106556-RMP
​Chuck Easley
​5/31/2026
​Minnesota
​612-220-1455
​111434-RMP
​Claire Neal
​8/31/2026
​Washington
​​559-706-3530
107918-RMP
Cory Martini
2/28/2027
California 916-838-7365
114061-RMP Dallas Jones 1/31/2026 Georgia 678-983-9312
110176-RMP Dana Carlton 11/30/2026
Nevada 775-842-5352
108446-RMP Daniel Prater 3/31/2026 California 408-655-2696
112948-RMP Danny Huerta 6/30/2026 California 213-507-0917
101158-RMP Darioush Ghahremani 4/30/2026 California 440-533-5000
111074-RMP David Gengenbacher 1/31/2026 California 562-235-6654
114095-RMP David Grunat 2/28/2026 California 510-756-0741
106131-RMP David Lucero 8/31/2026
California 818-731-9644
​114735-RMP
​David Rhea
​11/30/2026
​California
​858-220-9995
106759-RMP David Tillema 3/31/2027
California 949-289-3568
108735-RMP Deanna Lee
7/31/2026 California 213-276-9642
​25MS002
​Demchigsuren Dorj
​1/30/2027
​Minnesota
​952-686-3391
102942-RT
Dennis Ironi 3/31/2026 California 310-430-4440
​112914-RMP
​Derek Prunty
​6/30/2026
​Texas
​304-657-5261
104582-RMP
Derrick Quach 1/31/2026 California 510-786-9751
​112062-RMP
Donald Devine​​4/30/2027
​Colorado
​914-263-1415
113095-RMS
Dwayne Campeau 8/31/2026
California 714-920-8084
106364-RMP Edward Riley 8/31/2026
California 530-583-6653
114248-RMP Eliza Sahakian 4/30/2026 California 626-354-9554
​111480-RMP
​Elizabeth Scudero
​9/25/2025
​California
​​925-296-7730
113902-RMP
Ellen Bennett
7/31/2025 Florida 941-232-9627
​114887-RMP
​Erick Cortez
​2/28/2027
​California
​657-545-5319
​110925-RMP
​Esther Hardesty
​3/31/2026
​Colorado
​720-935-0652
​115030-RMP
​Fernando Garcia-Osorio
​3/31/2027
​California
​808-404-0769
​11130-RMP
​Frank Valerga
​8/31/2026
​California
​408-512-2912
​114931-RMFT
​Franklin Cresta
​2/28/2027
​Iowa
​515-954-5454
113534-RMP
Fred Ellrott Junior 6/30/2025 California
805-732-2476
114327-RMP Gabriela Cyrulik 5/31/2026 California
201-888-5423
114370-RMP
Glenn Tofani 6/30/2026 California
949-502-5353
​112889-RMP
​Glenn Zara
​7/31/2026
​California
​951-741-4225
100188-RMP Gustavo Delgado
9/30/2025 Hawaii 510-512-0046
​24MT024-RMT
​Hanna Caroline
​9/30/2026
​California
​310-922-7239
​107994-RMP
​Heri Rodriguez
​4/30/2026
​California
​​323-551-8449
​24MS013-RMS
​Hope Cline
​3/30/2026
​Maryland
​443-805-1021
​RMP-107424
​Jack Cooper
​9/30//2026
​California
​515-210-4407
​113850-RMP
Jacob Buss​​6/30/2025
​Louisiana
​225-333-7653
111714-RMP
Jacob Epperson
12/31/2026
Missouri
251-360-9514
​113421-RMP
​Jake Williams
​11/30/2026
​California
​619-705-7413
​RMT-16ST015
​James Fraley
​12/30/2026
​California
​310-576-7771
​24MS06-RMS
​James Loring
​8/30/2025
​California
​510-556-9811
114310-RMP James Mayfield
4/30/2026 California 310-880-9647
​114599-RMP
​James Ryan
​8/31/2026
​California
​970-310-3422
23MS076-RMS Jane Xiao 10/30/2025 California 415-952-9421
113870-RMP Jason Alaraz 7/31/2025 California 714-713-0805
107969-RMP Jason Gregory 5/31/2026 California 805-244-6687
​RMP-114784
​Jay Cudmore
​12/31/2026
​California
​858-752-0287
102014-RMP
Jeffrey Noel 5/31/2025 California 559-348-2200
17SS085-RMS Jennifer Alvarado 10/30/2025 California 805-798-3841
108660-RMP Jennifer Sims 6/30/2026  Kentucky 502-410-5000
107060-RMP Jeremy Gress 4/30/2027
California 949-677-7122
112497-RMP Jeremy Wesctott 11/30/2025  Michigan 734-649-9680
110989-RMT Jessica Belland
2/28/2026 California 310-218-1855
110831-RMP Joe Williams 9/30/2025 California 714-221-6360
108870-RMP John Henderson
12/31/2026
California 805-280-6616
111790-RMP Jonathan Feeney-Mosier 1/31/2027
California 619-458-0309
13SS057-RMS Jonathan Massey 8/30/2025 California 310-978-8281
23MS096-RMS Jooho Lee
12/30/2025 California 818-818-8972
​114953-RMP
​Jorge Ramos
​2/28/2027
​California
​714-499-7659
​114034-RMP
​Jose Villanueva
​2/28/2026
​California
​619-592-3967
​111602-RMP
​Joshua Cornejo
​11/30/2026
​California
​714-396-0715
106128-RMP Judith Woods 12/31/2025 California 805-563-0100
114237-RMP Juhun Kim 3/31/2026 California 909-837-0035
9SS0029-RMS Karen Shockley 9/30/2025 California 619-276-5901
​23MS059-RMS
​Karen Weber
​9/30/2025
​Illinois
​630-325-4443
103081-RMP
Kathleen Williamson
5/31/2026 Connecticut
860-298-6392
113718-RMP Katrina Scherr
5/31/2027
California 916-458-1098
111326-RMP Kayla Parzynski
6/30/2026 California 805-732-1272
​108008-RMP
​Kenneth Deemer
​5/31/2025
​Kentucky
​502-286-1250
​110412-RMP
​Kevin Minto
​11/30/2025
​California
​530-273-1300
​25MS008
​Kimberly Gilley
​1/31/2027
​Ohio
​614-516-3398
​115105-RMP
​Krista Butler
​4/30/2027
​Nevada
​775-823-6927
​108034-RMP
Kristen Schmidt
​10/31/2025
​Illinois
​630-479-2507
107585-RMP​
​Kurt Brickner
​5/31/2026
​South Carolina
​419-957-2422
24MS028-RMS Kyle Hamil 3/30/2026 Texas 972-951-4490
​111493-RMP
​Laura Mathys
​8/31/2026
​California
​919-412-3083
23MS060-RMS Linda Rogers
9/30/2025 Minnesota 612-443-5205
​113942-RMP
​Lisa Henderson
​12/31/2025
​California
​714-349-5760
​115032-RMP
​Lourdes Buenrostro
​3/31/2027
​California
​760-755-8135
114428-RMP
Luke Feher 7/31/2026 California 310-504-4642
113778-RMP Lynn Laborde 5/31/2025 California 909-645-3826
113880-RMP Mahima Hettiarachchi 6/30/2025 New York 212-629-0690
114219-RMS Malcolm Sabal 3/31/2026 California 310-415-8749
11SS027-RMS
Mark Drollinger 10/30/2025 California 818-246-2707
​114810-RMP
​Martha Lahti
​12/31/2026
​Colorado
​774-473-0921
​RMP-114802
​Martha Ortiz
​12/31/2026
​Arizona
​480-886-4783
​112919-RMP
​Martin Gibson
​6/30/2026
​Texas
​512-955-1161
​114999-RMP
​Matthew Burich
​3/31/2027
​California
​310-415-7041
24MS046-RMS
Matthew Cuda
5/30/2026 Oregon 503-880-0126
14SS035-RMS
Mazyar Hajiaghai 8/30/2026
California 408-540-4241
​24MT026-RMT
​Micaela Rodriguez
​10/30/2026
​California
​510-694-6002
105517-RMP Michael Atallah 10/31/2025 California 949-756-8282
7SS0011-RMS Michael Cantor 4/30/2027
California 949-275-4950
​108657-RMP
​Michael Lee
​7/31/2026
​California
​916-225-5615
23MS071-RMS
Michael Liston 10/30/2025 California 925-808-8197
106593-RMP Michael Pinkerton
1/31/2027
California 310-854-6300
​112976-RMP
​Michelle Brenner
​8/31/2026
​Kentucky
​502-410-5000
114300-RMP Michelle Everitt 5/31/2026 California 301-706-6549
​112005-RMP
​Miguel Garcia
​3/31/2027
​California
​714-240-8651
9SS0030-RMS
Milton Shockley 9/30/2025 California 619-276-5901
110412-RMP Minto Kevin 11/30/2025 California 530-273-1300
12SS002-RMS Murray Harreschou
2/28/2026
California 310-396-6532
​114822-RMP
​Natalie Pangilinan
​12/31/2026
​California
​279-900-5851
​108180-RMP
​Nate Seward
​7/31/2025
​California
​805-432-4888
​113883-RMT
​Nathaniel Grondin
​8/31/2025
​California
​774-275-4600
​24M6064
​Nathaniel Hed
​7/30/2026
​Minnesota
​612-293-4032
​114385-RMP
​Nayeli Bonilla
​6/30/2026
​California
​619-638-4377
​115069-RMP
​Noah Covarrubias
​4/30/2027
​California
​949-910-1440
110094-RMP
Oleksandr Zhdanyuk
10/31/2026
California 916-206-0829
100753-RMP Phil Thornberry 8/31/2025 Indiana 317-853-2172
​RMP-114812
​Phoenix Dorr
​12/31/2026
​California
​619-916-9744
113725-RMP
Ramiro Vejar 4/30/2027
California 909-333-8592
23MS026-RMS Randall Wheeler 5/30/2025 Wyoming 307-365-8429
ZEtwmwJSV8-RMP Randolph Brooke
3/19/2026 California 209-405-3501
​113945-RMP
​Reed Robins
​4/30/2026
​Texas
​719-233-3466
105251-RMP Remington Caldwell 5/31/2027
California 510-557-0592
100519-RMP ReveAnn Ellrot 11/30/2025 California 805-732-1272
101101-RMP Rich Davis 5/31/2025 Wahington 253-569-8572
​111239-RMP
Riley Ducey​​10/31/2026
​California
​909-747-7110
23MS093-RMP Rob Rosengarten
2/28/2027
Illinois 630-246-0745
114123-RMP Robert Bennett 1/31/2026 California 760-696-2389
112099-RMP Robert Hodges 4/30/2027
Colorado 309-231-8223
​114622-RMP
​Robert Ibarra
​9/30/2026
​California
​619-840-3757
108873-RMP Roland Walker
8/31/2025 California 650-873-4224
​RMP-112634
​Ronald Melchior
​2/28/2026
​California
​443-790-4613
​115074-RMP
​Ross McKenzie
​4/30/2027
​California
​925-436-8000
​103415-RMP
​Russell Vaughn
​7/31/2026
​California
​​530-273-6653
24MS001 Ryan Kawlewski
1/30/2026 Minnesota 320-266-5798
​114730-RMP
​Ryan Mandel
​11/30/2026
​California
​510-300-7404
​108234-RMP
​Samuel Harreschou
​1/31/2027
​California
​310-903-8656
​21ST004-RMT
​Santiago Arango Garces
​3/30/2027
​Florida
​954-540-0085
​114036-RMP
​Scott Yamauchi
​1/31/2026
​California
​​714-831-7591
​25MS026-RMS
​Sean Hanson
​3/30/2027
​California
​657-365-9041
​114532-RMP
​Shannon Esser
​8/31/2026
​California
​209-601-0413
23MT044-RMT Shawn Mc Williams 11/30/2025 California 702-217-9794
​111793-RMP
​Sherri De Mayo
​1/31/2027
​Florida
407-414-8292​
​25MS016
​Shilpa Suil
​3/31/2027
​California
​949-307-3522
​25MS024-RMS
​Sophie Schoenberge
​3/30/2027
​California
​920-536-2002
​111271-RMP
Stacey Winkler​
​4/30/2026
​Kentucky
​502-410-4999
113872-RMP Stephanie Grandstaff
7/31/2025 Florida 813-244-8283
23MS053-RMS Stephen DeVita 8/30/2025 Minnesota 661-476-0502
109015-RMP Stephen Saturno 10/31/2026
California 530-414-3815
15SS050-RMS Steve Vaughn 8/30/2025 California 310-930-3355
105129-RMP Steve Zilolich 10/31/2026
California 707-239-2601
109217-RMP Tanya Laurent
6/30/2025 California 310-990-7102
​112500-RMP
​Taylor McCleery
​9/30/2026
​California
​279-900-4998
​115002-RMP
​Ted Zeidan
​3/31/2027
​California
​818-639-2396
​114608-RMP
​Thomas Ayotte
​2/28/2027
​California
​​916-591-8442
104667-RMP Tim Utterback
1/31/2026 California 510-450-6193
​110242-RMP
Tony Mashhour​
​2/28/2027
​California
​661-341-1707
114256-RMP Tony Midmore
3/31/2026 Nevada 775-323-1117
110443-RMP Tracy Huchingson
8/31/2025 California 805-908-9274
​109320-RMP
​Tracy Watson
​8/31/2025
​Texas
​​713-854-8670
107194-RMP Trevor Marion 3/31/2026 California 925-787-8411
109694-RMP Troy Sciumbato 3/31/2026 California 559-416-6134
108599-RMP Tucker Kalman 4/30/2026 California 415-723-0962
111818-RMP Vanessa Calder 1/31/2027
California 916-751-9568
22SS005-RMS William Kading 2/28/2026
California
951-300-8396
110037-RMP William Mayes 8/31/2026
California 559-214-1070
​24MS092-RMS
​William Overton
​12/30/2026
​California
​​760-613-4696
114895-RMP
Zachary Greenfield
1/31/2027
California
847-690-0905

​​Mitigators

​The mitigators listed below have met their board requirements and have met specific CA Contractors License requirements. They are certified to operate in California.


​List ​​​​of​​
Contracto​rs

​Mitigation
Cert​ific​​ate #

​Expir​ation
Date
C​ontac​​t
Inf​ormation
​CA Contractor License #
​Eddie Huchingson​
​107621​
​​3/31/2027
​​805-908-9274
​612436
​Edward Riley
​​106415
​​8/31/2026
​530-583-6653
​960994
​Fred Ellrott
​101023
​​11/1/2026
​805-732-2476
​617021
​Jason Gregory
​107970
​5/​31/2026
​805-244-6687
​843797
​John Henderson
​​108871
​12/31/2026
​805-280-6616
​632908
​Jordan Heichman
​106156
​11/4/2026
​530-621-4052​
​816271
​Norman Denny
​106142
​8/31/2025
​775-691-7101
​241944
​Peter Mandel​
​104696
​3/31/2027
​510-300-7500
​839709
​Cameron Dopke
​​112346
​9/30/2025
​530-544-1865
​​922311
​​Daniel Frayman
​​114455
​1/31/2027
​818-749-8576
​1071369

A note about Contractors Licenses: Mitigators must also have a valid California Contractors License in one of a few specific categories. You can look up your contractor’s license here to make sure it meets our requirements.​

Mitigation Consultants

​The mitigators listed below have met their board requirements but do not have a CA Contractors License. They may consult on mitigation princples and design, but are not authorized construct mitigation systems in California.


​Certificat​i​on​Number​​​​
​Na​​​​​​me
​Date
E​​xp​​ir​​​ed
​St​​​​​ate
​Phone ​N​umbe​​r
111075
Bradley Cord
1/31/2026
Indiana
317-642-6094
108882
Brandon Ford
12/31/2026
California 530-544-1862
109575
Christopher Ferguson 4/30/2026
Kentucky 317-397-0326
101159 Darioush Ghahreman 1/31/2026 California 562-3235-6654
113095 Dwayne Campeau 8/31/2026
California 714-920-8084
113535
Fred Ellrott Junior 6/30/2025
California
805-732-2476
​105658
​Jennifer Sims
​6/30/2026
​Kentucky
​502-410-5000
​114168
​Winifred Cheuvront
​3/31/2026
​Kentucky
​502-410-5000
​114322
​Reed Robins
​4/30/2026
​Texas
​719-233-3466
​​113399

​Michelle Brenner
​​8/31/2026
​Kentucky
​502-410-5000

Laboratories

The testers listed below have met their b​oard requirements and are certified to operate in California:

Laboratories (PDF)

If someone offers you radon testing or mitigation and they are not on the approved lists here, they may NOT be certified to provide radon services in California.

To confirm a certification, re​​port a problem, or report a business selling radon services without the proper Certification, email the radon program at radonprogram@cdph.ca.gov or call (916) 449-5674.

Any person offering radon testing services, who is n​ot a certified professional, is in violation of CA Health and Safety Code sec 106790. Any test results would be invalid for legal purposes. Violation of this regulation is considered a misdemeanor and the individual may be fined up to $1,000, and their business will reported to the appropriate consumer protection agency or licensing board.

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