Residents Must Test Their Backflow System Annually, Deadline for Test Compliance Submission is December 31, 2021

The Plainview Water District (PWD) would like to remind residents that the New York State Health Department (NYSDOH) and Nassau County Health Department require testing on backflow devices. This compliance testing must be performed by a certified professional, and is extremely important in ensuring the safety of Plainview-Old Bethpage’s water supply.

“Having a proper, functioning backflow system is necessary to prevent contaminants from entering the District’s distribution system,” said PWD Chairman Marc Laykind. “Weed killers, fertilizers, and other lawn products will not find their way back into the public water supply after a period of low pressure with a certified backflow device.”

Backflow devices are mechanical double-check valves that prevent the water flow from reversing during a loss of water pressure. This loss can be caused by firefighter use or a water main break. These devices must be tested annually to make certain they are installed and functioning properly. Backflow devices prevent pollution and contamination of the public water supply during times of fluctuating pressure. Residents need a backflow device if they have: in-ground sprinklers, fire lines, swimming pools, or a private well that is interconnected with the public water supply to name a few conditions.

“Slight water pressure changes in the distribution system is not uncommon during the year due to differing water demands,” said PWD Commissioner Andrew Bader. “If a backflow device is not properly installed, chemicals and other pollutants can easily infiltrate our community’s water. It is important to heed the Department of Health’s warnings and get your device tested to help you and your neighbors avoid any potential dangers with our community’s water supply.”

The District encourages residents to arrange for a NYSDOH certified backflow tester to conduct their annual backflow test and avoid any penalties for noncompliance. The Plainview Water District keeps an up-to-date list of New York State licensed backflow testers on its website, The District also maintains its own dedicated Cross-Connection Control Department to help residents with compliance questions that can be reached at 516-931-6469.