Understanding Your Water Utility's Cross-Connection Control Survey

If you've recently received a notice from your water utility requesting access for a "cross-connection control survey," you're not alone — and you're probably wondering what exactly that means for you, your property, and your schedule. These surveys are a routine but critical part of protecting public drinking water, and understanding what inspectors are looking for can save you time, stress, and potential compliance headaches down the road.

This guide breaks down everything property owners, managers, and facility operators need to know about the cross-connection control survey process: why utilities conduct them, what gets inspected, how to prepare, and what happens if issues are found.

A water utility inspector with a clipboard conducting a cross-connection control survey at a commercial building's water meter room, showing backflow prevention equipment

What Is a Cross-Connection Control Survey?

A cross-connection control survey is a formal inspection conducted by your local water utility — or a certified inspector authorized by the utility — to identify points in your plumbing system where the potable (drinkable) water supply could potentially mix with non-potable water or other contaminants.

The term "cross-connection" refers to any actual or potential link between the public water supply and a source of contamination. These connections can be as simple as a garden hose submerged in a bucket of fertilizer solution, or as complex as industrial process piping that runs alongside the water supply lines in a manufacturing facility.

Water utilities are required by federal and state regulations to operate cross-connection control programs. The EPA's Safe Drinking Water Act sets the framework, while state drinking water agencies and local utilities implement the specific requirements. Surveys are one of the primary tools utilities use to find and eliminate risks before contamination events occur.

Why Your Property Is Being Surveyed

Receiving a survey notice doesn't mean your utility suspects something is wrong. Most programs survey all commercial, industrial, and multi-family properties on a rotating schedule. Certain property types — medical facilities, restaurants, irrigation-heavy properties, manufacturing plants, car washes, and buildings with fire suppression systems — tend to be surveyed more frequently because they carry higher inherent risk.

Your property may also be flagged for a survey if:

• You recently applied for a new water service connection
• You completed a significant renovation or added a new water-using system
• The utility is rolling out a new or expanded cross-connection control program in your area
• A previous survey identified issues that required follow-up

Regardless of the reason, the survey is fundamentally about protecting the water supply your property shares with the rest of the community.

What Inspectors Look For

During a cross-connection control survey, the inspector will walk through your property and trace the water supply lines from the meter to every point of use. They're trained to identify both obvious and subtle hazards. Here's a breakdown of the most common items they evaluate:

Backflow Prevention Device Inventory

The inspector will document every backflow preventer on your property — their location, type, size, and manufacturer. They'll verify that the devices installed are the correct type for the hazard level at each connection point. Not all backflow preventers are created equal: a simple atmospheric vacuum breaker that's appropriate for a garden hose connection is not sufficient protection for a boiler system or chemical injection line.

Installation Compliance

Even the right device installed incorrectly provides inadequate protection. Inspectors check that backflow preventers are installed according to the manufacturer's specifications and local plumbing code — including proper orientation, adequate clearance, accessibility for testing, and protection from physical damage or freezing.

Testing Records

Most jurisdictions require that testable backflow prevention assemblies (reduced pressure zone assemblies, double check valve assemblies, and pressure vacuum breakers) be tested annually by a certified tester and that records be submitted to the utility. The inspector will ask to see current test reports. Missing or expired records are one of the most common compliance issues discovered during surveys.

Potential Cross-Connections Without Protection

This is the core of the survey. The inspector looks for any point where the water supply connects — or could connect — to a non-potable source without adequate protection. Common findings include:

• Irrigation systems without proper backflow prevention
• Boilers and cooling towers with makeup water connections
• Fire sprinkler systems tied to the potable supply
• Chemical dispensing equipment with direct water connections
• Decorative fountains or water features
• Hose bibs accessible to the public or used with chemical applicators

Auxiliary Water Sources

If your property uses any non-utility water source — a private well, reclaimed water, collected rainwater, or a private pond — the inspector will pay close attention to how (or whether) those systems are isolated from the potable supply.

Close-up diagram showing different types of backflow prevention devices including a reduced pressure zone assembly and double check valve assembly with labels, displayed on a workbench

Preparing for Your Survey Appointment

A little preparation goes a long way toward making the inspection smooth and avoiding unnecessary findings.

Gather Your Documentation

Pull together your current backflow preventer test reports, any previous survey letters or compliance correspondence from the utility, and building plans or as-builts if you have them. Having this paperwork ready signals to the inspector that your program is well-managed and makes the process faster.

Know Your System

If you manage a large or complex property, make sure someone who knows the plumbing system accompanies the inspector. You don't want the inspection stalled because nobody can locate the mechanical room key or identify what a particular pipe connects to.

Ensure Access

Inspectors need access to all mechanical rooms, utility spaces, irrigation controls, rooftop equipment, and anywhere water supply lines run. Locked rooms with no escort available are a common source of delays — and in some jurisdictions, failure to provide access can trigger a compliance notice on its own.

Do a Pre-Survey Walk

Before the inspector arrives, walk the property yourself with your maintenance team. Look for any obvious unprotected hose connections, dripping backflow preventers, or equipment that may have been added since the last survey. Catching and correcting issues proactively is always better than having them appear in an official report.

What Happens If Issues Are Found

Survey findings are typically categorized by hazard level and urgency. Minor administrative issues — like test records that are a few weeks overdue — are usually handled with a written notice and a short compliance window. Moderate issues involving incorrect device types or installation problems will require correction within a defined timeframe, often 30 to 90 days.

Serious findings — an active cross-connection with a significant contamination risk, or a high-hazard connection with no backflow protection at all — can trigger an immediate compliance order. In extreme cases where the risk is severe and cannot be quickly mitigated, the utility has the authority to discontinue water service until the hazard is resolved.

If the survey reveals that existing backflow preventers haven't been tested, the utility will require you to schedule testing with a certified backflow tester promptly. That testing must be documented on the appropriate forms and submitted directly to the utility.

It's worth noting that survey findings are not punitive by design. Utilities want compliance, not confrontation. Most inspectors will walk you through exactly what needs to be corrected and why, and many utilities provide resource guides to help property owners meet their obligations.

The Ongoing Compliance Requirement

Passing a cross-connection control survey is not a one-time achievement. Compliance is an ongoing responsibility. Your testable backflow prevention assemblies must be tested annually, and those records must be kept current and submitted to your utility. If you add new water-using equipment, modify your plumbing system, or install a new irrigation system, you may be required to notify the utility and potentially install additional backflow protection.

Many property managers build backflow preventer testing into their annual maintenance calendar — scheduling it well before the utility's deadline to avoid the scramble that comes with a compliance notice. Some utilities send annual reminders, but ultimately the responsibility for staying current rests with the property owner.

Working with a certified backflow tester who is familiar with your local utility's requirements takes the guesswork out of the process. A qualified tester will complete the testing, fill out the required forms correctly, and in many cases submit the reports directly to the utility on your behalf.

Property manager reviewing backflow preventer test reports and compliance documents at a desk, with a calendar showing annual testing schedule in the background

Finding a Certified Backflow Tester

When your survey results require testing — or when you want to get ahead of your annual testing requirement — make sure you're working with someone who holds current backflow tester certification in your state. Certification requirements vary by jurisdiction, but most states require testers to pass a written and practical exam, use calibrated test equipment, and complete periodic continuing education.

Your water utility can usually provide a list of approved testers, or you can use FindBackflowTesters.com to locate certified professionals in your area quickly. Search by zip code to find testers who are familiar with your local utility's submission procedures and compliance requirements.

The Bottom Line

A cross-connection control survey is your water utility doing its job — protecting the integrity of the drinking water system that serves your property and your entire community. Approaching the survey as a partnership rather than an inspection puts you in the best position to identify any gaps in your program, correct them efficiently, and maintain the kind of compliance record that keeps future surveys straightforward.

Know your system, keep your testing records current, and work with certified professionals. That's the formula for turning a cross-connection control survey from a source of stress into a routine part of responsible property management.