Backflow Prevention

Click on downloadable forms below:
Registered Back Flow Testers

Test and Maintenance Report Form

Backflow Inspection Authorization


Policy Statement


(a) The Federal Safe Drinking Water Act of 1974 and the statutes of the Texas Commission on Environmental Quality (TCEQ) mandate that the water purveyor has the primary responsibility for preventing water from unapproved sources, or any other substances, from entering the public water system.
(b) References:
2009 International Plumbing Code
Recommended Practice for Backflow Prevention and Cross-Connection Control; published by the American Water Works Association, AWWA-M14, Second Edition.
Cross Connection Control Manual; published by Unites States Environmental Protection Agency, EPA 570989007, July 1989


The Nueces County Water Control & Improvement District No. 4 (District) shall be responsible for the protection of the public potable water distribution system from contamination or pollution due to the backflow or back-siphonage of contaminants or pollutants through the water service connection.


The District will keep records of all backflow prevention devices including the date last tested. Existing backflow prevention devices must be tested annually by a certified backflow prevention assembly tester. The test and maintenance report must be provided to the District within 10 days of the date of the test.

If deemed necessary by the District, an approved backflow prevention device is required at the District’s water service connection to any customer’s premises, new or existing, having irrigation systems, docks and dockside facilities, commercial carwashes, commercial laundries, marinas, medical clinics, veterinarian clinics, and any other high risk areas identified by the TCEQ and local plumbing codes. The District shall give notice in writing to said customer to install an approved backflow prevention device and provide the District, within 10 days of the date of installation, the test and maintenance report completed by a certified backflow prevention assembly tester.

Notification will be sent to customers to have the devices tested on an annual basis. A list of certified backflow prevention assembly testers will be provided. If test results have not been submitted to the District within 30 days of the date of the first notification, a final letter will be sent giving notification of termination of service or intent of the District to have the device tested and bill the customer inspection charges and administration fee. If discontinued, service will not be restored until the day the test is scheduled to be done. Administration fees will apply.

200 Howard Boulevard
Port Aransas, TX 78373

Office: 361-749-5201
Fax: 361-749-5799

Business Hours:
8am–12pm and 1pm–5pm
Mon. – Fri.

For water leaks or other emergencies, leave a message at 361-749-5201.
On call personnel will contact.