Backflow testing is a specialized skill that plays a critical role in protecting public drinking water. In California, certified backflow testers are in high demand by cities, water districts, and property managers to ensure backflow prevention assemblies are working properly.
If you’re looking to start a career as a backflow tester, here’s a step-by-step guide to getting certified in California.
A backflow tester inspects and tests backflow prevention assemblies to ensure contaminated water cannot flow back into the clean water supply. These devices are required in commercial buildings, irrigation systems, fire systems, and many residential applications.
Testers perform:
The first step is to complete a state-recognized backflow training course. Most certification programs require either:
A training course teaches:
Important: A training course is not the certification — it prepares you to pass the certification exam.
In California, the most widely accepted certification is through the
California-Nevada Section of the American Water Works Association
You’ll need to:
Applications typically must be submitted at least 20 days before your exam date.
The written exam is computer-based and divided into two parts:
Covers:
Covers:
You must pass both parts of the written exam to move forward.
After (or alongside) the written exam, you must pass a practical exam where you:
This is where many people struggle — hands-on training is critical.
Once you pass:
You’ll receive your certification as a Backflow Prevention Assembly Tester (BPAT).
As of early 2026, AWWA BPAT Certification has been recognized by the State Water Resources Control Board (SWRCB) and is the standard credential accepted by many water districts and local health agencies, including major areas like Los Angeles and Orange County.is accepted by all water agencies throughout California.
While the certification itself is widely recognized, many local water purveyors or city departments (e.g., LADWP, municipal water districts) require that you register with them directly and appear on their approved local tester list before you can submit test reports.
Regulatory Transition: As of July 1, 2025, California regulations mandate that backflow testers must be certified by a SWRCB-recognized organization (like CA-NV AWWA).
After certification, you can:
Many testers build recurring income through annual testing contracts.
Most people can become certified in:
Typical costs include:
Yes — especially in California.
Becoming a backflow tester in California is one of the fastest ways to enter a specialized, in-demand trade. With the right training and certification, you can start generating income quickly and even build your own business.
If you’re looking for a training program that prepares you for both the written and hands-on exams, check out our Backflow Tester Certification Course.