Cross connection control and backflow testing is done to protect the County’s drinking water supply from possible contamination caused by back pressure or back siphonage conditions. This is a state law (Virginia Department of Health and Virginia Uniform Statewide Building Code) that Arlington County administers and enforces through regular inspections of County buildings (Arlington County Code 26-114).
If a County inspector is unable to complete an inspection or confirm compliance during the initial visit, then the owner of a building is responsible for having the backflow preventers tested, and repaired if necessary, by a Virginia-state certified backflow device professional. You can find a partial list of such professionals. Once that testing has been completed and the device approved, complete this Cross Connection Control Report form with the backflow device professional’s signature and license number. You have 14 days from the original notice to return the form to the 10th floor of 2100 Clarendon Boulevard or to the fax number listed on the original inspection notice.
If an existing cross-connection on your premises should cause contamination of the public drinking water, you’re legally liable for whatever damages are caused by the pollutant.