24 Aug Backflow Testing on Long Island: What Sprinkler System Owners Need to Know
If your property has an in-ground sprinkler system connected to the public water supply anywhere in Suffolk or Nassau County, New York State requires that its backflow prevention device be tested at least once a year by a New York State certified tester, with the results filed with your local water district. Skipping this test is not just a compliance issue. It leaves a real gap in the safeguard that keeps water from your lawn and landscaping from ever flowing backward into the drinking water supply.
What Is a Backflow Prevention Device, and Why Does It Matter?
A backflow prevention device is a mechanical assembly installed where your irrigation system connects to the water line. Its job is to allow water to flow in only one direction, out toward the sprinklers, and never back toward the public water main. Irrigation systems are considered a cross connection risk because lawn chemicals, fertilizer, standing water, and soil could all be pulled back into the drinking water supply if system pressure suddenly drops, such as during a water main break or heavy demand from nearby firefighting, without a working backflow preventer in place.
Why New York Requires Annual Testing
Backflow prevention testing in New York is governed by the state’s cross connection control regulation, 10 NYCRR Part 5-1.31, enforced through the New York State Department of Health’s Cross Connection Control Program. The regulation requires that testable backflow devices be inspected annually by a tester holding current New York State certification.
In practice, it is your local water district that enforces this requirement at the property level, and Long Island is served by dozens of separate water districts, each with its own reporting process. As one example, Westbury Water District requires annual test results to be filed directly with the district and with the Nassau County Department of Health. Requirements like these are consistent in spirit across Suffolk and Nassau County, but the specific form and deadline can vary depending on which district serves your address, which is exactly why it helps to work with a team that already knows the paperwork for your area.
What Happens If You Skip Your Backflow Test?
- Fines or penalties issued by your local water district
- Possible water service interruption in more serious or repeated cases
- A device that fails silently, leaving the cross connection risk unaddressed for another year
- Compounding non-compliance if a missed test carries over into the following year
Can You Test Your Own Backflow Device?
No. Backflow testing is not a do-it-yourself project the way replacing a sprinkler head might be. Under New York State regulation, the test must be performed by an individual holding current backflow tester certification, using calibrated test equipment, with results recorded on the required state or district form. It is closer in spirit to an annual furnace or elevator inspection than a routine maintenance task, and for good reason: the entire point of the test is to confirm the device is protecting the public water supply, not just your own property.
What to Expect During a Backflow Test
- The certified tester connects calibrated gauges to the backflow prevention device.
- Each check valve and relief valve is tested for proper operation under controlled test conditions.
- Readings are recorded on the required New York State or local water district form.
- Results are filed with your local water district on your behalf.
- If the device fails, it is repaired or replaced and then retested before the paperwork is submitted.
Backflow Testing Across Suffolk and Nassau County
Every water district we work with, from North Shore harbor communities to South Shore neighborhoods to the farmland and vineyards of the North Fork, requires this annual test. What changes from district to district is the specific reporting form and deadline, not the underlying requirement. Working with a provider who already understands these local variations means one less thing for a property owner to track down each year.
When to Call McCormack Irrigation
McCormack Irrigation has New York State certified testers on staff for backflow testing and has served Suffolk and Nassau County since 2001. Our team files all required paperwork with your local water district on your behalf, and our work is reflected in a 4.9 out of 5 rating across 336 Google reviews and an A+ rating with the Better Business Bureau. Our in-house crews, never subcontractors, handle backflow testing on its own or paired with your spring turn on service.
Due for your annual backflow test? Call McCormack Irrigation today at (631) 744-1500 or contact us online to schedule certified testing anywhere in Suffolk or Nassau County.