The City of Hawthorne has a well-established and robust backflow prevention program that helps ensure the safety of its public water supply.
Hawthorne property owners are responsible for installing, testing, and maintaining backflow prevention devices and must comply with the city's requirements to avoid penalties. Ensuring timely testing, maintenance, and repair of backflow devices is crucial for protecting both individual properties and the public water system. Non-compliance can result in fines, civil liabilities and the disruption of water service.
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Because backflow devices are critical to maintaining clean, safe water supplies, California State Water Districts, County Health Boards and Local Municipalities regulations mandate that only licensed and certified backflow technicians and plumbers who have the expertise, training, have the legal authority to perform repairs or replacements in compliance with regulations and with the necessary quality control to protect the public water system.
The City of Hawthorne enforces comprehensive backflow prevention regulations to protect its public water supply from contamination. Through enforcement of its municipal code and collaboration with the Los Angeles County Department of Public Health, the city ensures public health and water safety.
Failing to comply with the regulations may result in fines or suspension of water service. It is important for Hawthorne homeowners and businesses to stay up-to-date with local regulations and to ensure that their backflow devices are tested annually by a certified tester.
The City of Hawthorne has adopted rigorous standards for cross-connection and backflow prevention to protect its potable water system. This program complies with the California Code of Regulations, Title 17, and mandates the installation and maintenance of approved backflow prevention assemblies (BPAs) at service connections where potential hazards are identified.
Through enforcement of its municipal code and collaboration with the Los Angeles County Department of Public Health, the city ensures public health and water safety.
The program mandates the installation of approved backflow prevention devices at service connections where potential hazards are identified.
Property owners in Hawthorne are obligated to install, test, and maintain backflow devices and cooperate with inspections. Non-compliance can lead to water service interruption and financial penalties.
Additionally Hawthorne homeowners and businesses must arrange for annual testing by certified testers and submit the test results to the City and or County Public Works Departments.
And more generally, Hawthorne property owners are responsible for keeping their backflow prevention devices in good working condition. If a device fails or is malfunctioning, repairs or replacements must be made immediately, and the device must be retested.
Failure to comply with Hawthorne backflow prevention requirements may result in penalties, including water service discontinuation.
The City of Hawthorne enforces backflow prevention regulations to protect its public water supply from contamination. These regulations aim to prevent backflow, the unwanted reverse flow of water that can introduce pollutants or contaminants into the potable water system by implementing:
- Backflow Prevention: To prevent the reverse flow of water that can introduce pollutants or contaminants into the public drinking water system.
- Cross-Connection Control: To eliminate or safeguard against connections between potable and non-potable water systems, ensuring the safety of drinking water.
Hawthorne CA, mandated the installation, testing and maintenance of backflow prevention devices in conformance with state, county regulations and city ordinances to protect the public water supply from contamination due to reverse water flow.
Hawthorne's water system is managed by the City's Public Works Department, which enforces backflow prevention measures in accordance with:
- California Code of Regulations Title 17: Outlines the requirements for backflow prevention and cross-connection control.
- Hawthorne Municipal Code: Provides detailed guidelines for implementing cross-connection control programs.
All backflow prevention devices must be approved by recognized standards agencies like the Foundation for Cross-Connection Control and Hydraulic Research at USC or other equivalent organizations.
Hawthorne’s backflow regulations require the installation of approved backflow prevention assemblies (BPAs) in specific scenarios, including:
- Hawthorne Property Irrigation Systems: To prevent contaminants from entering the potable water supply through irrigation lines.
- Hawthorne Commercial and Industrial Properties: Facilities with potential cross-connections, such as those involving chemicals or pressurized systems, are required to install appropriate backflow prevention assemblies.
- Hawthorne Property Fire Protection Systems: To prevent stagnant water from fire suppression systems from flowing back into the drinking water supply.
- Hawthorne Property Auxiliary Water Sources: Properties with alternative water sources like wells or cisterns must install backflow prevention devices to prevent cross-contamination.
Failure to install a required backflow prevention assembly can result in termination of water service at your property by the City of Hawthorne until compliance is achieved.
To ensure the continued effectiveness of backflow prevention assemblies, the following backflow testing and maintenance protocols are required in Hawthorne CA:
- Hawthorne Annual Backflow Testing: All backflow prevention assemblies must be tested at least once a year by a certified tester.
- Hawthorne Post-Installation or Repair Backflow Testing: Any new installation, relocation, or repair of a backflow device requires immediate testing to confirm correct operation.
- Hawthorne Backflow Record Keeping: Test results must be submitted to the appropriate regulatory agency to maintain compliance records.
- Hawthorne Approved Backflow Devices: Only backflow prevention assemblies listed by recognized testing agencies are permitted for residential and commercial properties in Compton. The University of Southern California’s Foundation for Cross-Connection Control and Hydraulic Research (USC-FCCCHR) provides a comprehensive list of approved devices.
- Hawthorne Certified Backflow Testers: Testing must be conducted by individuals certified by the Los Angeles County Department of Public Health. A directory of certified testers is available on their official website
Failure to comply with Hawthorne backflow testing requirements can result in water service termination until compliance is achieved.
Additionally, the City of Hawthorne backflow installation guidelines outline the follwoing installation requirements:
- Backflow Installation Responsibility: Property owners are responsible for the installation of backflow prevention assemblies when required by the City.
- Backflow Location & Access: Devices must be installed in accessible areas and protected from environmental damage or vandalism.
- Backflow Compliance Enforcement: Failure to install a required backflow prevention assembly can result in termination of water service until compliance is achieved.
Failure to install the required backflow prevention assemblies for properties in Hawthorne CA may result in the city discontinuing water service until compliance is achieved.
The City of Hawthorne requires the installation of specific backflow prevention devices based on the level of hazard associated with the water use:
- Reduced Pressure Principle Backflow Prevention Device (RP): Required for all non-residential connections to protect against high hazards.
- Double Check Valve Assembly (DC): Required for all non-residential fire suppression system connections, upgrades, and new installations.
- Air Gap Separation (AG): May be approved as a higher level of protection upon prior written approval from the City.
These devices must be approved by the City and installed in accordance with the California Administrative Code Title 17, Section 7603.
The appropriate device is determined based on the degree of hazard present on the property.
Proper testing and maintenance of backflow devices are essential for compliance with local regulations and for safeguarding community health in Hawthorne CA.
The City of Hawthorne has the following requirements for testing, certification, and documentation of backflow prevention assemblies:
- Initial Backflow Testing: Backflow prevention assemblies must be tested immediately after installation by a certified backflow tester.
- Annual Backflow Testing: Required once every 12 months to verify the continued effectiveness of the device.
- Certified Backflow Testers Only: All testing must be performed by professionals certified by the Los Angeles County Department of Public Health.
- Backflow Test Reports: Completed test reports must be submitted to the City within the required timeframe.
- Backflow Compliance: Untested or failed devices may trigger enforcement actions, including service interruption.
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Hawthorne CA property owners are responsible for ensuring that backflow prevention devices are properly installed, tested annually, and maintained in good working order. Non-compliance with the following regulations can lead to penalties, including the interruption of water service:
Responsibilities of Hawthorne Property Owners;
- Backflow Installation: Ensuring proper device installation by a licensed plumber using approved assemblies.
- Annual Backflow Testing: Hiring a certified tester to complete the mandatory annual testing.
- Submission of Backflow Test Reports: Ensuring test reports are submitted on time to the city.
- Backflow Maintenance and Repair: Ensuring the device is maintained in working condition. If repairs are necessary, the device must be retested immediately.
- Backflow Compliance During Construction: Developers and contractors must include appropriate backflow prevention measures in all project designs and plans where cross-connection potential exists.
- Understand that non-compliance may result in disconnection of water services or fines.
The City of Hawthorne conducts thorough cross-connection inspections to monitor potential risks in both residential and commercial settings. These inspections are essential for maintaining water safety and preventing the backflow of contaminants into the public supply.
Purpose of Inspections:
- Identify existing or potential cross-connections.
- Confirm that proper backflow prevention assemblies are installed.
- Evaluate whether device types match the hazard level.
- Enforce compliance where violations exist.
When Inspections Occur:
- During new construction, remodeling, or plumbing system upgrades.
- When a new service connection is initiated for commercial or industrial properties.
- Periodically, based on a property's risk profile or device testing history.
- In response to complaints or observed irregularities in water system behavior.
Inspection Process:
1. Advance Notice: Property owners are informed by the City before the inspection.
2. Onsite Visit: A certified Cross-Connection Specialist inspects the plumbing and device setup.
3. Hazard Assessment: The inspector evaluates system complexity and potential contamination risks.
4. Reporting: A written inspection report is issued with required actions or corrections.
5. Follow-Up: Re-inspections are scheduled for any deficiencies or outstanding issues.
Consequences for Non-Compliance:
- Water service may be suspended or disconnected.
- Re-inspection or administrative fees may be applied.
- Continued violations may result in legal penalties per the city code.
Proper testing and maintenance of backflow prevention devices are essential for compliance with local regulations and for safeguarding community health. The City of Hawthorne has the following requirements for testing, certification, and documentation of backflow prevention assemblies:
- Testing Fees: Determined by the private certified tester. These fees are separate from any City administrative or permit charges.
- Re-inspection or Reconnection Fees: May apply if devices fail, are overdue for testing, or service is disconnected due to non-compliance.
The City of Hawthorne's cross-connection and backflow regulations are built upon a combination of local municipal code, state plumbing regulations, and county public health enforcement. These include:
- Hawthorne Municipal Code – Chapter 13.08: Outlines the requirements for backflow prevention and cross-connection control.
- California Plumbing Code (Title 24, Part 5 of the California Code of Regulations): Dictates backflow device installation, hazard classification, and device specifications.
- Title 17, California Code of Regulations: Defines cross-connection control program responsibilities for public water systems.
- USC Foundation for Cross-Connection Control: The City relies on USC’s list of approved backflow prevention assemblies and testing protocols.
- AWWA Manual M14: Referenced for installation practices, hazard assessments, and maintenance recommendations.
For questions or assistance with cross-connection control or backflow testing in the City of Hawthorne, contact:
California Water Service – Rancho Dominguez District
- Address: 2632 W. 237th Street, Torrance, CA 90505
- Phone: (310) 257-1400
- Website: City of Hawthorne - Backflow Prevention
For further guidance or assistance with backflow prevention compliance, contact the City of Hawthorne Public Works Department for resources and support.
Here is a outline of special circumstances pertaining to backflow assembly installation, testing and repair in Hawthorne CA which require special attention:
- Irrigation Systems: All systems connected to City water must include appropriate backflow protection, especially those using fertilizers or pesticides.
- Fire Suppression Systems: Require device installation depending on connection type and risk classification.
- Multi-Family and Commercial Developments: Typically classified as higher risk and subject to additional oversight.
- Emergency Protocols: If a cross-connection is suspected, the City may require immediate shutdown, inspection, or remediation.
Hawthorne, located in the South Bay region of Los Angeles County, is a historically significant and rapidly evolving city known for its aerospace heritage, central location, and rising profile in the global tech and innovation sectors. With a population of approximately 88,000 residents, Hawthorne balances its working-class roots with a bold vision for the future—anchored by cutting-edge industries, cultural diversity, and strategic infrastructure.
Incorporated in 1922, Hawthorne has long held a reputation as an industrious and resilient community. During the mid-20th century, the city became a vital player in the aviation and aerospace boom that defined Southern California. Companies like Northrop Corporation and Hughes Aircraft were major employers, and Hawthorne quickly developed into a residential suburb for skilled laborers and military families supporting the aerospace sector.
Today, Hawthorne has reemerged as a key node in the new space economy, thanks largely to the presence of SpaceX, the private space exploration company founded by Elon Musk. Located on the site of a former Boeing and Northrop facility, the SpaceX headquarters and rocket manufacturing plant has transformed the city into a hub of technological innovation and international interest. With its workforce of engineers, scientists, and technicians, SpaceX has brought global attention—and economic energy—to Hawthorne, reshaping its image in the 21st century.
Transportation infrastructure is another defining feature of Hawthorne’s identity. The city benefits from direct access to major freeways (I-105, I-405), its own general aviation facility (Hawthorne Municipal Airport – Jack Northrop Field), and proximity to Los Angeles International Airport (LAX). Public transit options are expanding through Metro's C Line (Green Line), which has a station in Hawthorne and offers connections to both the South Bay and Downtown Los Angeles.
Civic life in Hawthorne is anchored by City Hall, the Hawthorne Memorial Center, and the Hawthorne Police Department, all of which are centrally located and easily accessible to the public. The Memorial Center functions as a community venue for cultural events, educational programs, and city-sponsored celebrations. Just across the street is the Hawthorne Historical Society Museum, which preserves the city’s rich legacy in aviation and mid-century suburban development.
Parks and recreation are a strong aspect of community life. Holly Park, Jim Thorpe Park, and the expansive Eucalyptus Park offer sports fields, picnic areas, fitness paths, and youth programs. The Hawthorne Pool and community sports leagues provide recreational outlets for families and youth, while seasonal events like the Hawthorne Carnival, holiday parades, and summer concerts in the park contribute to the city’s sense of community.
Culturally, Hawthorne is one of the most diverse cities in Los Angeles County, with significant Latino, African American, Asian American, and Pacific Islander populations. This diversity is reflected in the city’s food scene—ranging from Salvadoran pupusas and Mexican taquerías to Japanese ramen shops and soul food kitchens—as well as in its public art, music festivals, and school celebrations.
Hawthorne also boasts a notable place in pop culture and music history. It was the childhood home of The Beach Boys, whose early sound was shaped by the suburban Southern California environment of the 1950s and 60s. A landmark monument at the site of their former home commemorates their contributions to American music.
Education is supported by the Hawthorne School District, Centinela Valley Union High School District, and charter schools, many of which have received recognition for academic achievement and innovation. Schools like Hawthorne Math & Science Academy, consistently ranked among the top high schools in California, reflect the city’s growing emphasis on STEM education in alignment with local industry needs.
Residential neighborhoods in Hawthorne range from classic postwar subdivisions and modest apartment communities to new mixed-use developments and townhomes, particularly near transit corridors. Areas such as Del Aire, North Hawthorne, and Bodger Park offer family-friendly streets, tree-lined blocks, and access to parks and schools.
As it continues to grow, Hawthorne remains focused on revitalization and smart development. Initiatives include transit-oriented housing near the Green Line, support for small businesses, and sustainability improvements across city infrastructure. The city’s motto, “City of Good Neighbors,” underscores a civic philosophy that combines progress with community care.
Today, Hawthorne is a city on the rise—blending its aerospace legacy and multicultural fabric with a forward-looking embrace of technology, innovation, and inclusive growth. Positioned at the intersection of history and the future, Hawthorne continues to evolve as one of Southern California’s most dynamic and promising urban communities.
Municipal Office Contact Info:
Hawthorne City Hall
Address: 4455 W. 126th Street
Hawthorne, CA 90250
Phone: (310) 349-2900
