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Certified Backflow Assembly Testers

Oregon Drinking Water Services (DWS) provides a public list of OHA-certified Backflow Assembly Testers. The list is voluntary and not all certified testers choose to be on the list. Select the county you want, and then you can sort by certification #, name of tester, employer, city, and state. If you are a certified specialist trying to verify a test report but don't see the tester on the list, email the DWS Cross Connection Program at cross.connection@dhsoha.state.or.us.

Only OHA-certified Testers are allowed to provide testing services in Oregon. Backflow Assembly Testers who provide their testing services for a fee are required to be licensed through the Construction Contractors Board (CCB) or the Landscape Contractors Board (LCB). Testers on the following list have provided information to DWS that they, or the company they work for, have either a CCB or LCB license; however, this information has not been verified. To verify licensing, you can look up CCB licenses or LCB licenses.

Certification Number Tester Name Phone Number Employer Address City State ZIP Code Expiration Date Numeric Cert SortName
008094 Richard E. Vanderkin 503-357-1444 Accurate Backflow PO Box 157 Forest Grove OR 97116 12/31/2023 8094 Vanderkin, Richard E.
010853 Michael P. Hansen 503-956-4742 Backflow Professionals 395 Beverly Ln Gladstone OR 97024 12/31/2024 10853 Hansen, Michael P.
038118 Brian T. Kromer 503-421-1013 CRM Backflow 1109 SW 1st Ave, Ste F407 Canby OR 97013 12/31/2024 38118 Kromer, Brian T.
058772 Steven C. Olson 503-449-4335 Peak Mountain Backflow, LLC 55600 E Highway 26 Sandy OR 97055 12/31/2023 58772 Olson, Steven C.
066108 Jordan T. Ashland 503-981-6131 Ashland Brothers Landscape 2153 Molalla Rd Woodburn OR 97071 12/31/2024 66108 Ashland, Jordan T.
106645 Joshua D. Harper 503-691-9000 Pye-Barker Fire and Safety 18260 SW 100th Court Tualatin OR 97062 12/31/2024 106645 Harper, Joshua D.
1128 Steven Ackerman 503-698-2211 19139 Windmill Dr Oregon City OR 97045 12/31/2024 1128 Ackerman, Steven
336894 Kendall W. Scherr 503-351-0266 Bens Backflow, LLC 21641 SE Happiness Hill Ln Eagle Creek OR 97022 12/31/2023 336894 Scherr, Kendall W.
3466 Tim A. Aufenthie 503-318-6313 T&R Building Services 8660 Rogue Lane Wilsonville OR 97070 12/31/2024 3466 Aufenthie, Tim A.
3823 Mark D. Anderson 503-849-4700 19146 Merchant Place Oregon City OR 97045 12/31/2024 3823 Anderson, Mark D.
4004 Michael A. Warford 503-406-8572 Red Side Landscape PO Box 1894 Oregon City OR 97045 12/31/2023 4004 Warford, Michael A.
401084 Cole R. Robinson 503-475-9080 Farr Better Backflow Testing LLC PO Box 389 Boring OR 97009 12/31/2023 401084 Robinson, Cole R.
4019 Michael J. Younce 503-289-1745 AMERICAN BACKFLOW SERVICES 5623 SE Center St Portland OR 97206 12/31/2023 4019 Younce, Michael J.
4060 Sarbjit S. Dhah 503-658-1828 Sunrise Landscape Professionals LLC PO Box 665 Boring OR 97009 12/31/2024 4060 Dhah, Sarbjit S.
4063 Robert S. Petersen 503-488-0773 North West Plumbing & Backflow Inc. 12042 SE Sunnyside Rd PMB476 Clackamas OR 97015 12/31/2023 4063 Petersen, Robert S.
4096 Jeremy L. Tower 503-806-4734 PO Box 1981 Sandy OR 97055 12/31/2023 4096 Tower, Jeremy L.
4101 Paul Molisani 503-830-0171 PM Backflow PO Box 981 Wilsonville OR 97070 12/31/2023 4101 Molisani, Paul
4117 Eugene G. Mason 503-631-3947 MP PLUMBING Po Box 393 Clackamas OR 97015 12/31/2023 4117 Mason, Eugene G.
4212 Earl S. Shook 503-777-7777 Dennis 7 Dee's Landscaping 7355 SE Johnson Creek Blvd Portland OR 97206-9329 12/31/2023 4212 Shook, Earl S.
445823 Nathan J. Bernert 503-432-7905 Bernert Landscaping 1660 S Elm St Canby OR 97013 12/31/2024 445823 Bernert, Nathan J.
4486 Kyle Harms 503-289-1745 AMERICAN BACKFLOW SERVICES 5623 SE Center St Portland OR 97206 12/31/2024 4486 Harms, Kyle
4491 Sabino Martinez 503-631-3516 Sierra Landscaping Maintenance LLC 17681 S Springwater Rd Oregon City OR 97045 12/31/2023 4491 Martinez, Sabino
4588 Larry P. Smith 503-951-3094 34321 S. Barlow Rd Woodburn OR 97071 12/31/2023 4588 Smith, Larry P.
509012 Felix J. Pagan 503-395-3996 Apollo Drain & Rooter 853 NE Harlow Rd Troutdale OR 97060 12/31/2023 509012 Pagan, Felix J.
5119 Kevin Krajewski 971-983-9456 Dynamic Backflow PO Box 610 Wilsonville OR 97070 12/31/2024 5119 Krajewski, Kevin
5314 Kerry Tweit 541-786-5050 K T Landscaping, Inc 74 Hawthorne Dr La Grande OR 97850 12/31/2023 5314 Tweit, Kerry
5643 Robert Offinga 971-246-3443 Crown Fire Systems 7402 SE Johnson Creek Blvd Portland OR 97206 12/31/2023 5643 Offinga, Robert
565267 Herbert S. Carson 503-875-4701 Cascade Mechanical Systems PO Box 399 Estacada OR 97023 12/31/2024 565267 Carson, Herbert S.
572968 Trevor R. Hill 360-726-9642 A-Absolute Comfort 15886 S Park Pl Ct Oregon City OR 97045 12/31/2024 572968 Hill, Trevor R.
5799 Tyler F. Robinson 541-490-6488 Farr Better Backflow Testing LLC PO Box 389 Boring OR 97009 12/31/2023 5799 Robinson, Tyler F.
6130 Brent T. Barker 503-894-0563 Centurion Fire Protection PO Box 1705 Oregon City OR 97045 12/31/2024 6130 Barker, Brent T.
6134 Sorin Oancea 503-734-4510 WESTERN STATES FIRE PROTECTION 13896 Fir St Suite B Oregon City OR 97045 12/31/2023 6134 Oancea, Sorin
6294 Monty L. Graham 503-347-1107 M&E Backflow Consulting 1517 NE 10th Pl Canby OR 97013 12/31/2024 6294 Graham, Monty L.
6307 Brent T. Beck 503-341-3980 Becks Botanical, Inc PO Box 638 Wilsonville OR 97070 12/31/2024 6307 Beck, Brent T.
6310 Matthew V. Kaatz 503-742-6083 Beavercreek Backflow LLC 22175 S Beavercreek Rd Beavercreek OR 97004 12/31/2024 6310 Kaatz, Matthew V.
6416 Eric R. Nealeigh 503-319-6396 AMERICAN BACKFLOW SERVICES 5623 SE Center St Portland OR 97206 12/31/2023 6416 Nealeigh, Eric R.
6450 Edgar I. Martinez 503-317-4681 T&R Building Services 31040 SW Salmon Ln Wilsonville OR 97070 12/31/2023 6450 Martinez, Edgar I.
6622 Benjamin K. Enebo 844-623-8378 Bens Backflow, LLC 21641 SE Happiness Hill Ln Eagle Creek OR 97022 12/31/2024 6622 Enebo, Benjamin K.
759253 Matthew J. Zinzer 503-406-8233 Portland Metro Backflow Testing, LLC 7085 SW Barr Ln Tualatin OR 97062 12/31/2023 759253 Zinzer, Matthew J.