Got a backflow test notice?
Backflow testing rules for your water utility
Who must test, when it's due, how to find an approved tester, how the report gets filed and what happens if you miss it. 29 utilities in 5 states, each checked against the utility's own pages, most recently on Oct 18, 2026.
- Aurora, COAurora Water
- Colorado Springs, COColorado Springs Utilities
- Denver, CODenver Water
- Boise, IDVeolia Water Idaho
- Idaho Falls, IDCity of Idaho Falls Water Division
- Meridian, IDCity of Meridian Water Division
- Nampa, IDCity of Nampa Waterworks Division
- Twin Falls, IDCity of Twin Falls Water Department
- Beaverton, ORCity of Beaverton Water (Public Works)
- Bend, ORCity of Bend Water Services (Public Works)
- Eugene, OREugene Water & Electric Board (EWEB)
- Gresham, ORCity of Gresham Water (Department of Environmental Services)
- Hillsboro, ORCity of Hillsboro Water Department
- Portland, ORPortland Water Bureau
- Salem, ORCity of Salem Public Works (Cross Connection and Backflow Prevention Program)
- Arlington, TXArlington Water Utilities (City of Arlington)
- Austin, TXAustin Water
- Dallas, TXDallas Water Utilities
- Fort Worth, TXFort Worth Water Department (Fort Worth Water)
- Houston, TXCity of Houston (Houston Public Works, Houston Water)
- Killeen, TXCity of Killeen Water & Sewer
- San Antonio, TXSan Antonio Water System (SAWS)
- Bellevue, WACity of Bellevue Utilities
- Kent, WACity of Kent Water Utility
- Renton, WACity of Renton Water Utility
- Seattle, WASeattle Public Utilities
- Spokane, WACity of Spokane Water and Hydroelectric Services
- Tacoma, WATacoma Water (Tacoma Public Utilities)
- Vancouver, WACity of Vancouver Water Utility (Public Works, Water Quality)
What the utilities we checked require
- 23 of 29test lawn sprinkler backflow assemblies every year
- 26 of 29say they can shut off water when a test is missed
- 2 of 29list a filing fee, $15 to $37.93
Browse by state
- ColoradoAurora · Colorado Springs · Denver
- IdahoBoise · Idaho Falls · Meridian · Nampa · Twin Falls
- OregonBeaverton · Bend · Eugene · Gresham · Hillsboro · Portland · Salem
- TexasArlington · Austin · Dallas · Fort Worth · Houston · Killeen · San Antonio
- WashingtonBellevue · Kent · Renton · Seattle · Spokane · Tacoma · Vancouver