Find a Tester to Call
Every tester below comes from the Oregon Health Authority's public list of certified Backflow Assembly Testers and serves Multnomah, Washington, or Clackamas county. Tap to call one directly to schedule your test. Inclusion on this list is voluntary — not every certified tester appears here, and appearing here is not an endorsement. We are not affiliated with OHA or the Portland Water Bureau.
Last updated from the OHA public list on July 6, 2026.
Showing 139 of 139 companies (162 of 162 certified testers)
Recommended
Highest-rated companies in the directory — ratings from Google.
Max Plumbing Service
5.0(101 Google reviews)Jason P. Horner
Cornelius · Washington Co.
OHA cert BAT-355217
Alpha & Omega Construction
5.0(27 Google reviews)Samuel A. Andras
Oregon City · Clackamas Co.
OHA cert BAT-658080
Bens Backflow, LLC
5.0(12 Google reviews)Benjamin K. Enebo
Eagle Creek · Clackamas Co.
OHA cert BAT-6622
United Fire
4.9(478 Google reviews)Portland · Multnomah Co.
2 OHA-certified testers
- Jason B. Wallace · cert BAT-5707
- Luke A. Labonte · cert BAT-6035
Lawn & Irrigation Technologies NW
4.9(174 Google reviews)Brady Brewster
Hillsboro · Washington Co.
OHA cert BAT-146484
All companies
1-800-Plumber & Air/MEP Pros Inc.
Aron S. McNamee
Beaverton · Washington Co.
OHA cert BAT-398502
3Kallecks Home Services
Troy C. Kalleck
Sherwood · Washington Co.
OHA cert BAT-4723
A 2 Z Backflow
Michael D. Hoilien
McMinnville · Washington Co., Clackamas Co.
OHA cert BAT-673220
A-Absolute Comfort
Trevor R. Hill
Oregon City · Clackamas Co.
OHA cert BAT-572968
A&E Backflow Testing LLC
Eric R. Nealeigh
Milwaukie · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-6416
Abel Irrigation & Lighting
Ryan D. Everson
Portland · Multnomah Co.
OHA cert BAT-6755
Access Backflow Testing & Repair
Jordan T. Ashland
Woodburn · Washington Co., Clackamas Co.
OHA cert BAT-066108
Accurate Backflow
4.7(18 Google reviews)Forest Grove · Multnomah Co., Washington Co., Clackamas Co.
2 OHA-certified testers
- Richard E. Vanderkin · cert BAT-008094
- Alex T. Vanderkin · cert BAT-194759
Ace Construction & Mechanical Inc
Tualatin · Washington Co.
2 OHA-certified testers
- Alan C. Emami · cert BAT-789251
- Austin A. Emami · cert BAT-424936
Advanced Irrigation Systems
Vince Kinman
Portland · Multnomah Co.
OHA cert BAT-3284
Affordable Inspections LLC
Josh Tucker
Forest Grove · Washington Co.
OHA cert BAT-547529
Alexander R. Barr
Molalla · Clackamas Co.
OHA cert BAT-415478
Alfredo Cibrian-Sandoval
Portland · Multnomah Co.
OHA cert BAT-5525
All Seasons & Aloha Backflow Inc
Bill Ellis
Beaverton · Washington Co.
OHA cert BAT-3758
All Star Fire Protection & Backflow Serv
David K. Brune
Boring · Clackamas Co.
OHA cert BAT-167939
Alpha & Omega Construction
5.0(27 Google reviews)Samuel A. Andras
Oregon City · Clackamas Co.
OHA cert BAT-658080
American Backflow & Plumbing Services
4.3(82 Google reviews)Portland · Multnomah Co.
6 OHA-certified testers
- Michael J. Younce · cert BAT-4019
- Joshua D. Blacker · cert BAT-5313
- Owen H.P. Johnston · cert BAT-256834
- Skyler A. Hoyt · cert BAT-930492
- Smith A. Garcia-Santos · cert BAT-403787
- Joel Flores-Leal · cert BAT-89321
American Backflow & Plumbing Services, I
4.3(82 Google reviews)Portland · Multnomah Co.
4 OHA-certified testers
- Myles C. Diehl · cert BAT-427783
- Trevor A. Taylor · cert BAT-877061
- Jeremy Case · cert BAT-442940
- James A. Chayanam · cert BAT-791727
American Plumbing Services
4.3(82 Google reviews)Colby R. Jones
Portland · Multnomah Co.
OHA cert BAT-500817
Anderson: Backflow, Irrigation, & OD Lig
Oregon City, Woodburn · Multnomah Co., Washington Co., Clackamas Co.
2 OHA-certified testers
- Mark D. Anderson · cert BAT-3823
- Roscoe J. Anderson · cert BAT-630037
Andrew L. Cornils
Gaston · Washington Co.
OHA cert BAT-289882
Austin P. Gallagher
Portland · Multnomah Co.
OHA cert BAT-5725
B&G Excavation and Plumbing, LLC
4.5(116 Google reviews)Robert Umemoto
Damascus · Clackamas Co.
OHA cert BAT-255454
Backflow Prevention Device Testing
Gregory Douglas
Tualatin · Washington Co.
OHA cert BAT-2708
Backflow Professionals
Michael P. Hansen
Gladstone · Washington Co., Clackamas Co.
OHA cert BAT-010853
Be Right Backflow
Casey D. Sims
Portland · Washington Co.
OHA cert BAT-927300
Beavercreek Backflow LLC
5.0(7 Google reviews)Matthew V. Kaatz
Beavercreek · Clackamas Co.
OHA cert BAT-6310
Becks Botanical, Inc
Brent T. Beck
Wilsonville · Clackamas Co.
OHA cert BAT-6307
Beeline Backflow
McMinnville, Hillsboro · Washington Co.
2 OHA-certified testers
- Rachel Beebe · cert BAT-4406
- Jacob L. Warren · cert BAT-5682
Bennett Irrigation & Backflow Services
4.4(14 Google reviews)Paul Bennett
Milwaukie · Clackamas Co.
OHA cert BAT-4891
Bens Backflow, LLC
5.0(12 Google reviews)Benjamin K. Enebo
Eagle Creek · Clackamas Co.
OHA cert BAT-6622
Billygoat Landscaping
Michael A. Swanzy
Portland · Multnomah Co.
OHA cert BAT-6008
Blessing Landscapes LLC
4.6(111 Google reviews)David C. Dillon
Portland · Multnomah Co.
OHA cert BAT-6541
Brandon L. Hay
Hillsboro · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-933204
Brent A. Handley
Sherwood · Washington Co.
OHA cert BAT-610676
Brewster N Sons, LLC
Ashley M. Brewster
Dufur · Multnomah Co.
OHA cert BAT-369963
Bruton Backflow & Irrigation, LLC
Matthew B. Bruton
Fairview · Multnomah Co.
OHA cert BAT-3791
Bruton Backflow and Irrigation
Fairview · Multnomah Co.
2 OHA-certified testers
- Richard T. Bruton · cert BAT-4535
- Nathaniel D. Miller · cert BAT-951260
C & D Landscape Services Co.
4.3(79 Google reviews)Julian A. Urena
Dayton · Washington Co.
OHA cert BAT-520455
Carlos J. Pena
Oregon City · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-118304
Cascade Mechanical Systems
3.7(6 Google reviews)Herbert S. Carson
Estacada · Clackamas Co.
OHA cert BAT-565267
Cascadia Landscaping LLC
Jhovany Arellano-Sanchez
Beaverton · Washington Co.
OHA cert BAT-749452
Casey D. Madsen
Stayton · Clackamas Co.
OHA cert BAT-646770
Castle Renovations, LLC
Christopher L. Wagner
Oregon City · Clackamas Co.
OHA cert BAT-416570
Centurion Fire Protection
1.0(1 Google review)Oregon City · Multnomah Co., Washington Co., Clackamas Co.
2 OHA-certified testers
- Brent T. Barker · cert BAT-6130
- Jill E. Barker · cert BAT-636270
Cesar Barajas-Varagas
Cesar Barajas-Vargas
Cornelius · Washington Co.
OHA cert BAT-444478
Clearwater Backflow Testing Services
Jordan J. Scott
Portland · Multnomah Co.
OHA cert BAT-5336
CRM Backflow
Brian T. Kromer
Canby · Clackamas Co.
OHA cert BAT-038118
Crouchley Plumbing Co
4.7(60 Google reviews)Tracey A. Miller
Portland · Multnomah Co.
OHA cert BAT-5365
David R. Thurston
Portland · Multnomah Co.
OHA cert BAT-685119
Dennis 7 Dee's Landscaping
Earl S. Shook
Portland · Clackamas Co.
OHA cert BAT-4212
DETEMPLE COMPANY INC
3.9(53 Google reviews)Milwaukie · Clackamas Co.
2 OHA-certified testers
- Richard A. Ortiz · cert BAT-543650
- Nicholas Wolfe · cert BAT-303422
Drakes 7 Dees
Paul W. Marshall
Portland · Multnomah Co.
OHA cert BAT-3756
Eric R. Towner
Weiser · Washington Co.
OHA cert BAT-6514
Ernest Landscaping LLC
Gabriel Tera Palomares
Hillsboro · Washington Co.
OHA cert BAT-438908
Ezequiel Vasquez
Woodburn · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-689863
Farr Better Backflow Testing LLC
Boring · Clackamas Co.
2 OHA-certified testers
- Tyler F. Robinson · cert BAT-5799
- Cole R. Robinson · cert BAT-401084
Felix J. Pagan
Troutdale · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-509012
Flow Forward
5.0(1 Google review)Melissa J. Schmeer
West Linn · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-403645
Freedom Sprinklers
Matthew A. Erickson
Weiser · Washington Co.
OHA cert BAT-682795
Gardenview Landscape Irrigation & Mainte
Jesus Gonzalez
Hillsboro · Washington Co.
OHA cert BAT-3886
Green Growth Landscape Maintenance
Uriel Cruz-Salgado
Aurora · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-861086
Green Leaf Irrigation & Landscape
4.7(15 Google reviews)Portland · Multnomah Co.
2 OHA-certified testers
- Eric Whittier · cert BAT-228743
- Ida C. Sullivan · cert BAT-353003
Green Leaf Irrigation & Landscaping
Steven M. Patarozzi
Portland · Multnomah Co.
OHA cert BAT-3625
Hayward Plumbing
Lowell O. Hayward
Woodburn · Washington Co.
OHA cert BAT-62575
Jake W. Knutson
Canby · Clackamas Co.
OHA cert BAT-881430
Jeremiah Barton
Hillsboro · Washington Co.
OHA cert BAT-307014
Joseph Galati
Portland · Multnomah Co.
OHA cert BAT-63573
K T Landscaping, Inc
Kerry Tweit
La Grande · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-5314
Karlo Ramirez-Moreno
Wilsonville · Clackamas Co.
OHA cert BAT-439334
Kenneth L. Pisano
Portland · Multnomah Co.
OHA cert BAT-008237
Kolyn M. McConachie
Portland · Multnomah Co.
OHA cert BAT-799109
Landscape East & West
4.5(116 Google reviews)David W. Been
Clackamas · Washington Co.
OHA cert BAT-2551
Lawn & Irrigation Technologies NW
4.9(174 Google reviews)Brady Brewster
Hillsboro · Washington Co.
OHA cert BAT-146484
Lenny's Sprinkler & Lighting Service
Patrick R. Smith
Beaverton · Washington Co.
OHA cert BAT-5819
Lenny's Sprinkler & Lighting Services
Lenny R. Cook
Beaverton · Washington Co.
OHA cert BAT-4206
Leonard's Plumbing Co.
Yevgeniy L. Skobelev
Damascus · Multnomah Co.
OHA cert BAT-567697
Lively Backflow Testing
Jerrold L. Lively
Portland · Multnomah Co.
OHA cert BAT-6440
M&E Backflow Consulting
Monty L. Graham
Salem · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-6294
Matthew J. Zinzer
Tualatin · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-759253
Max Plumbing Service
5.0(101 Google reviews)Jason P. Horner
Cornelius · Washington Co.
OHA cert BAT-355217
Metro Safety & Fire, Inc
4.0(28 Google reviews)Joavauni C. Loberg
Portland · Multnomah Co.
OHA cert BAT-980222
Michael A. Warford
Oregon City · Clackamas Co.
OHA cert BAT-4004
Michael S. Gallagher
Portland · Multnomah Co.
OHA cert BAT-5724
MP PLUMBING
4.6(194 Google reviews)Clackamas · Clackamas Co.
2 OHA-certified testers
- Steven Ackerman · cert BAT-1128
- Eugene G. Mason · cert BAT-4117
MP PLUMBING CO
4.6(194 Google reviews)Austin Taylor
Clackamas · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-496210
Nathan J. Bernert
Canby · Clackamas Co.
OHA cert BAT-445823
New Life Landscape, LLC
3.9(17 Google reviews)Marshall D. King
Hillsboro · Multnomah Co., Washington Co.
OHA cert BAT-983229
Nicholas C. Heppes
Oregon City · Clackamas Co.
OHA cert BAT-676259
Nicholas N. Nakashima
Portland · Multnomah Co.
OHA cert BAT-958352
North West Plumbing & Backflow Inc.
Robert S. Petersen
Clackamas · Clackamas Co.
OHA cert BAT-4063
Nu Fire Sprinkler Co LLC
Joseph A. Durbin
Boring · Clackamas Co.
OHA cert BAT-189947
NW Maintenance & Electrical Services
Luis A. Huertas
Newberg · Washington Co.
OHA cert BAT-5560
NW Mowbotics LLC
Daniel L. Richardson
Estacada · Multnomah Co., Clackamas Co.
OHA cert BAT-56909
Olguin C Landscaping, LLC
Cristino Olguin
Beaverton · Washington Co.
OHA cert BAT-719918
Oregon Backflow Testing
Ryan T. Yancey
Tigard · Washington Co.
OHA cert BAT-6756
Oregon Backflow Testing LLC
5.0(1 Google review)Portland · Washington Co.
2 OHA-certified testers
- David E. Crosswhite · cert BAT-410255
- Allen G. Teran · cert BAT-883975
Oregon Hydro-Turf, LLC
Stephen P. Burlison
Oregon City · Clackamas Co.
OHA cert BAT-673413
Pacific Lawn & Landscape LLC
Robert E. Ferguson
Portland · Clackamas Co.
OHA cert BAT-513812
Patjun W. Martin
Portland · Multnomah Co.
OHA cert BAT-433730
PDX Fire Protection, LLC
5.0(9 Google reviews)Spencer B. Stavenau
Portland · Clackamas Co.
OHA cert BAT-317361
Performance Systems Integration
4.5(125 Google reviews)Guy Cutler
Portland · Washington Co.
OHA cert BAT-4294
PM Backflow
Paul Molisani
Wilsonville · Clackamas Co.
OHA cert BAT-4101
ProTurf Landscaping LLC
Ricky A. Perkins
Forest Grove · Washington Co.
OHA cert BAT-29656
Pye Barker Fire & Safety
4.0(16 Google reviews)Max V. Pavlenko
Tualatin · Washington Co.
OHA cert BAT-917128
Rachel S. Jimenez
Portland · Multnomah Co.
OHA cert BAT-811970
Red Shield Fire Protection
William C. Loftis
Forest Grove · Washington Co.
OHA cert BAT-6637
Robert Fitzgerald
Tigard · Washington Co.
OHA cert BAT-3251
Rueda Landscape LLC
Kerri L. Pyeatt
Beaverton · Multnomah Co., Washington Co., Clackamas Co.
OHA cert BAT-529675
Sergio Flores-Salgado
Aloha · Washington Co.
OHA cert BAT-5744
Shearer Nsaniti LLC
The Dalles · Multnomah Co.
2 OHA-certified testers
- Jacqueline M. Shearer · cert BAT-722423
- Marcus W. Shearer · cert BAT-780474
Sierra Landscaping Maintenance LLC
Sabino Martinez
Oregon City · Clackamas Co.
OHA cert BAT-4491
Sonya Sanders
Hillsboro · Washington Co.
OHA cert BAT-5123
Steven C. Ackerman Jr
Portland · Multnomah Co.
OHA cert BAT-680889
Stumptown Remodel & Repair
Dane C. Lawlor
Portland · Multnomah Co.
OHA cert BAT-486655
Sunrise Landscape Professionals LLC
Sarbjit S. Dhah
Boring · Clackamas Co.
OHA cert BAT-4060
T&R Building Services
Wilsonville · Clackamas Co.
2 OHA-certified testers
- Tim A. Aufenthie · cert BAT-3466
- Edgar I. Martinez · cert BAT-6450
Three Mountains Construction, LLC
Francisco Carrada-Jimenez
Tigard · Washington Co.
OHA cert BAT-371343
Trevor L. Broyles
Sherwood · Washington Co.
OHA cert BAT-742497
Troll Landscaping Maintenance & Irrigati
John M. Baker
Portland · Multnomah Co.
OHA cert BAT-5307
United Fire
4.9(478 Google reviews)Portland · Multnomah Co.
2 OHA-certified testers
- Jason B. Wallace · cert BAT-5707
- Luke A. Labonte · cert BAT-6035
Uriel Diaz
Portland · Multnomah Co.
OHA cert BAT-360321
Vincent M. Myers
Beaverton · Washington Co.
OHA cert BAT-1788
Western Roots Landscape
Nikolaos S. Miller
Portland · Washington Co.
OHA cert BAT-5818
Western Waters Plumbing & Backflow
5.0(2 Google reviews)Brian M. Eames
Keizer · Washington Co., Clackamas Co.
OHA cert BAT-996430
Westside Residential Backflow Testing, L
Anthony W. Braaten
Beaverton · Washington Co.
OHA cert BAT-6807
Wolf Landscape & Hardscapes LLC
5.0(1 Google review)Israel Negrete
Clackamas · Clackamas Co.
OHA cert BAT-576312
WOW Fire Protection
Tualatin · Multnomah Co., Washington Co., Clackamas Co.
2 OHA-certified testers
- Pattric W. Smith · cert BAT-393103
- Joshua D. Harper · cert BAT-106645
Verify any tester's certification on the official OHA list if you have any doubt.