OHA Drinking Water Services

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@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 Numeric Cert SortName
066108 Jordan T. Ashland 503-981-6131 Ashland Brothers Landscape 2153 Molalla Rd Woodburn OR 97071 66108 Ashland, Jordan T.
1810 Charles C. Melton 503-357-1444 Accurate Backflow Testing 2715 Harvest Court Forest Grove OR 97116 1810 Melton, Charles C.
194759 Alex T. Vanderkin 503-702-2143 Accurate Backflow 2715 Harvest Ct Forest Grove OR 97116 194759 Vanderkin, Alex T.
2551 David W. Been 503-256-5302 Landscape East & West PO Box 430 Clackamas OR 97015 2551 Been, David W.
2708 Gregory Douglas 503-692-2885 Backflow Prevention Device Testing PO Box 808 Tualatin OR 97062 2708 Douglas, Gregory
3251 Robert Fitzgerald 503-620-4761 10835 SW Tigard St Tigard OR 97223 3251 Fitzgerald, Robert
3379 Roland Beebe 503-695-3286 NW Backflow Inspection & Testing PO Box 1536 Hillsboro OR 97123 3379 Beebe, Roland
3564 Eddy Tor 503-603-9988 WATER METRICS WEST 16120 SW 72nd Ave Portland OR 97224 3564 Tor, Eddy
3758 Bill Ellis 503-649-2721 All Seasons & Aloha Backflow Inc PO Box 1811 Beaverton OR 97075 3758 Ellis, Bill
3823 Mark D. Anderson 503-849-4700 16397 Front Ave Oregon City OR 97045 3823 Anderson, Mark D.
3886 Jesus Gonzalez 503-693-6823 Gardenview Landscape Irrigation & Maintenance 1095 NE Cornell Road Hillsboro OR 97124 3886 Gonzalez, Jesus
4184 Thomas J.B. Vinzant 503-227-2641 11663 Teal Blvd, Apt D Beaverton OR 97007 4184 Vinzant, Thomas J.B.
4190 Josh Martin 971-570-7630 Don Martin Property Management 17872 SW Dodson Dr Sherwood OR 97140 4190 Martin, Josh
4206 Lenny R. Cook 503-403-9446 Lenny's Sprinkler & Lighting Services PO Box 2097 Beaverton OR 97075 4206 Cook, Lenny R.
4214 Esequiel Robles 503-997-9874 Esequiel Robles Landscaping PO Box 20897 Keizer OR 97307 4214 Robles, Esequiel
424936 Austin A. Emami 503-887-6477 Ace Construction & Mechanical Inc 18840 SW Boones Ferry Rd #216 Tualatin OR 97062 424936 Emami, Austin A.
4294 Guy Cutler 503-641-2222 Performance Systems Integration 7324 SW Durham Rd Portland OR 97224 4294 Cutler, Guy
4406 Rachel Beebe 503-695-3286 NW Backflow Inspection & Testing PO Box 939 Willamina OR 97396 4406 Beebe, Rachel
4695 Michael D. Stimpson 971-226-2403 16869 SW 65th Ave #9 Lake Oswego OR 97035 4695 Stimpson, Michael D.
482808 Aaron Lancaster 971-413-0302 17416 SE Brooklyn St Portland OR 97236 482808 Lancaster, Aaron
4835 Erik Van Dyke 360-693-9906 Performance System Integration 7324 SW Durham Rd Portland OR 97224 4835 Van Dyke, Erik
4878 Ignacio Valencia 503-389-0066 IV Landscape PO Box 239 Cornelius OR 97113 4878 Valencia, Ignacio
5023 Tyler Ochoa 503-621-7931 Genuine Greens Landscape & Irrigation Po Box 374 Banks OR 97106 5023 Ochoa, Tyler
520455 Julian A. Urena 503-864-3551 C and D Landscape 16800 NE McDougall Rd Dayton OR 97114 520455 Urena, Julian A.
5324 Chongchou Vang 503-682-0469 On The Mark Enterprises Inc 25350 SW Garden Acres Rd Sherwood OR 97140 5324 Vang, Chongchou
5369 Eduardo D. Garcia-Lopez 503-912-2057 2180 NW Cornelius Pass Rd Hillsboro OR 97124 5369 Garcia-Lopez, Eduardo D.
5523 Mason R. Yungeberg 503-289-1745 Local Plumbing Co. 17416 SE Brooklyn Street Portland OR 97236 5523 Yungeberg, Mason R.
5589 Christopher J. Posthuma 360-713-4466 COLUMBIA CROSS CONNECTION 12950 SW Glen Road Lake Oswego OR 97219 5589 Posthuma, Christopher J.
5624 John W. Sheridan 503-277-3184 All Northwest Backflow & Irrigation LLC 18334 SW Florendo Ln Beaverton OR 97007 5624 Sheridan, John W.
5645 Mauricio T. Mendoza 503-640-5963 2083 NE 15th Ave Hillsboro OR 97124 5645 Mendoza, Mauricio T.
5682 Jacob L. Warren 503-695-3286 NW Backflow Inspection & Testing PO Box 939 Willamina OR 97396 5682 Warren, Jacob L.
5744 Sergio Flores-Salgado 503-277-9086 6890 SW 188th Ave Aloha OR 97007 5744 Flores-Salgado, Sergio
5762 Eric D. Knight 541-229-0911 Performance Systems Integration 7324 SW Durham Rd Portland OR 97224 5762 Knight, Eric D.
5818 Nikolaos S. Miller 503-850-8242 Western Roots Landscape 3817 SE Liebe Portland OR 97202 5818 Miller, Nikolaos S.
5819 Patrick R. Smith 503-403-9446 Lenny's Sprinkler & Lighting Service PO Box 2097 Beaverton OR 97075 5819 Smith, Patrick R.
5937 Marc C. Bottorff 503-560-4276 17703 NW Reindeer Dr Portland OR 97229 5937 Bottorff, Marc C.
5944 Brandon D. Smith 503-575-0788 Johnson Controls 6090 SW 187th Pl Aloha OR 97007 5944 Smith, Brandon D.
5979 Sean P. Fitzpatrick 503-853-9597 FIRE EXTINGUISHER SERVICE CENTER 3460 SW 209th Ave Beaverton OR 97007 5979 Fitzpatrick, Sean P.
6028 Robert M. Jones 503-444-1148 Flowcheck, LLC PO Box 4093 Hillsboro OR 97123 6028 Jones, Robert M.
6224 Cuauhtemoc A. Mendez-Sierra 503-608-8650 CM Landscape Maintenance PO Box 1638 North Plains OR 97133 6224 Mendez-Sierra, Cuauhtemoc A.
6425 Ian M. King 503-643-3304 FIRE EXTINGUISHER SERVICE CENTER 3460 SW 209th Ave Beaverton OR 97006 6425 King, Ian M.
6436 Scott A. Loomis 503-601-9039 Performance Systems Integrated 7324 SW Durham Rd Portland OR 97224 6436 Loomis, Scott A.
646770 Casey D. Madsen 503-351-8215 Monarch Landscaping 1800 NE Cornelius Pass Rd Hillsboro OR 97124 646770 Madsen, Casey D.
6637 William C. Loftis 503-866-6854 DTS Systems, Inc 7905 SW Nimbus Ave Beaverton OR 97008 6637 Loftis, William C.
6673 Timothy P. Heffelbower 360-903-7255 PROGRASS INC 28985 SW Kinsman Rd Wilsonville OR 97070 6673 Heffelbower, Timothy P.
6756 Ryan T. Yancey 931-302-5843 Oregon Backflow Testing 15685 SW 116th Ave #199 King City OR 97224 6756 Yancey, Ryan T.
6807 Anthony W. Braaten 503-352-5040 17435 SW 129th Ave King City OR 97062 6807 Braaten, Anthony W.
697555 Benjamin M. Price 503-748-9957 Local Plumbing Co. 20833 SW Olds Place Sherwood OR 97140 697555 Price, Benjamin M.
789251 Alan C. Emami 503-816-9757 Ace Construction & Mechanical Inc 18840 SW Boones Ferry Rd #216 Tualatin OR 97062 789251 Emami, Alan C.
851966 Sally A. McCurdy 503-567-7555 Terra Beaut, LLC dba Conserva Irrigation of NW Portland 2652 N Argyle St Portland OR 9717 851966 McCurdy, Sally A.
896238 Gerardo A. Navarro 503-625-8553 PO Box 1565 Sherwood OR 97140 896238 Navarro, Gerardo A.
950 Ellis Cookman 503-645-0296 17895 NW Tillamook Dr Portland OR 97229 950 Cookman, Ellis