Backflow Laws: Nevada
Nevada Backflow Prevention Laws, Regulations, and Compliance Requirements
Nevada's backflow prevention requirements are governed by Nevada Administrative Code (NAC) 445A.67185 through 445A.67255, administered by the Nevada Division of Environmental Protection (NDEP). Nevada is notable for its parallel enforcement structure: the Southern Nevada Health District (SNHD) enforces backflow requirements at food facilities, aquatic health venues, and public accommodations under NRS 439 and NAC 444/445A. Las Vegas Valley Water District uniquely maintains, tests, and repairs assemblies itself — billing a monthly service fee. Henderson requires a city orientation for testers. TMWA serves Reno with a Northern Nevada Public Health-coordinated program. This guide covers all major Nevada utilities and the SNHD's food facility program.
Nevada State Regulatory Framework
Nevada’s backflow prevention requirements are established in Nevada Administrative Code (NAC) 445A.67185 through 445A.67255, governing cross-connection control programs for all public water systems in Nevada. The Nevada Division of Environmental Protection (NDEP) administers Nevada’s Safe Drinking Water Program with EPA primacy. NDEP provides a Cross-Connection Control Program (CCCP) guidance document and template to assist small and medium-sized water systems in developing their programs.
Nevada state code has required builders to install backflow prevention assemblies in new commercial properties since the 1990s. Nevada water purveyors are required by NAC 445A to implement backflow prevention programs. The most recent regulatory update referenced by TMWA is LCB R104-22, which updated the NAC backflow requirements.
Nevada requires: a written cross-connection control program; retention of inventory and testing records; implementation of enforcement methods; and annual testing of all covered assemblies. Annual testing is universally required across Nevada utility service areas.
Southern Nevada Health District's Parallel Enforcement Role
The Southern Nevada Health District (SNHD) has separate authority to enforce cross-connection protection requirements at specific facility types under NRS 439, NAC 444, and NAC 445A. SNHD inspectors enforce backflow protection at permitted food facilities (restaurants, bars, commercial kitchens), aquatic health facilities (pools, spas), public accommodations (hotels, motels), and mobile home parks. For food facilities, SNHD has detailed requirements including RPZ assemblies upstream of carbonators (with specific copper prohibition downstream), backflow protection for mop sinks with attached accessories, and air gap requirements for backwash/waste disposal.
Nevada Tester Certification — Locally Administered
Nevada does not administer a statewide backflow tester certification. Certification requirements vary by jurisdiction. The California-Nevada Section of the American Water Works Association (CA-NV AWWA) certification is widely accepted across Nevada. ABPA certification is also accepted by most Nevada utilities. Individual utilities — notably Henderson — impose additional local requirements beyond just holding a certification credential.
Las Vegas Valley Water District's Unique Self-Service Model
The Las Vegas Valley Water District (LVVWD) uses a model unique among major U.S. utilities: the District itself maintains, tests, and repairs backflow prevention assemblies on commercial buildings, multifamily properties, and irrigation systems — rather than requiring property owners to hire testers. Customers with required assemblies are assessed a monthly service fee to cover the cost of the District’s backflow maintenance and testing services. Property owners in LVVWD territory do not need to hire independent testers; the District handles testing. This is the opposite of the customer-responsibility model used by virtually every other major U.S. utility.
Major Water Purveyors in Nevada
Las Vegas Valley Water District (LVVWD)
LVVWD serves the City of Las Vegas and portions of Clark County, with approximately 1 million customers. LVVWD’s backflow prevention program is unique nationally: the District installs, maintains, tests, and repairs assemblies itself, billing customers a monthly service fee. The District determines whether an assembly is required at a specific property, installs assemblies according to its own installation requirements, and inspects installations after completion. Property owners do not arrange separate annual testing — the District manages testing as part of the service fee. If you have questions about backflow prevention at an LVVWD-served property, contact LVVWD Backflow Prevention staff at 702-258-3156.
Southern Nevada Water Authority (SNWA)
SNWA is the regional wholesale water authority for Southern Nevada, supplying water to LVVWD, Henderson, North Las Vegas, Boulder City, Henderson, and other member utilities. SNWA itself does not have direct retail cross-connection control interactions with property owners — those interactions go through the retail member utilities. SNWA oversees the regional water supply system and enforces member utility compliance with NAC 445A requirements at the wholesale level.
City of Henderson
Henderson, Nevada’s second-largest city, operates one of Nevada’s most structured cross-connection control programs under the Henderson Municipal Code (HMC) 14.08 and NAC 445A.67185 through 445A.67255. Henderson requires that testing companies be authorized by the City’s Department of Utility Services before submitting any test reports. Authorization requires: attending a City of Henderson orientation meeting; holding a current certification from CA-NV AWWA or ABPA; holding a city or multi-jurisdictional business license; and maintaining required equipment. Effective April 1, 2024, Henderson-authorized test companies must submit test reports through Henderson’s Online Test Portal. Annual testing is required for all commercial assemblies.
City of North Las Vegas
North Las Vegas operates a cross-connection control program under NAC 445A requirements. Annual testing by CA-NV AWWA or ABPA-certified testers is required. Test results are submitted directly to North Las Vegas utilities.
Truckee Meadows Water Authority (TMWA)
TMWA serves the Reno/Sparks metro area in Northern Nevada — approximately 400,000 customers. TMWA’s cross-connection control program is aligned with NAC 445A and LCB R104-22. TMWA has worked with Northern Nevada Public Health to develop backflow retrofit programs for residential and commercial customers. TMWA is particularly focused on reclaimed water cross-connection prevention given the increasing use of reclaimed water for irrigation in the Truckee Meadows. TMWA requires that backflow prevention assemblies be tested annually by certified testers. TMWA’s program documentation and construction standards for backflow are available on TMWA’s website.
Carson City Area and Rural Nevada
Carson City’s regional water system and smaller utilities in Nevada’s rural counties serve communities outside the two main urban centers. Each operates cross-connection control programs aligned with NAC 445A requirements. NDEP provides the CCCP guidance template for small systems implementing their programs.
Southern Nevada Health District Food Facility Program
For any Nevada food facility, aquatic health venue, hotel/motel, or mobile home park, the SNHD’s Environmental Health inspectors enforce backflow protection requirements during routine inspections. Specific SNHD requirements include: carbonators must have an RPZ upstream (no copper tubing downstream of the carbonator); mop sinks require backflow protection if anything is attached to the faucet; main potable water lines for public accommodations supporting self-contained RVs require an RPZ; and aquatic health venues (pools/spas) must have AG, PVB, or RPZ on the water supply. SNHD contacts for backflow: Nate Diaz at diazn@snhd.org.
Henderson's April 2024 Online Portal Requirement
Effective April 1, 2024, all City of Henderson authorized testing companies must submit backflow prevention assembly test reports through Henderson’s Online Test Portal. Paper or email submissions are no longer accepted. Testers who have not registered for the Online Test Portal cannot submit valid test results for Henderson compliance purposes — and property owners who hired such testers would receive notices of non-compliance despite having paid for testing. Confirm your Henderson-area tester is registered for and using the Online Test Portal before scheduling service.
Property Owner Compliance Summary for Nevada
LVVWD properties: The District handles testing — no independent tester required. Pay the monthly service fee.
Henderson properties: Use Henderson-authorized testers only. Results submitted through Henderson’s Online Test Portal (required since April 1, 2024).
TMWA (Reno) properties: Annual testing by CA-NV AWWA or ABPA-certified testers. Confirm TMWA’s specific tester authorization requirements.
Food facilities and pools (SNHD): Annual testing enforced by SNHD inspectors under NRS 439 / NAC 444/445A.
Annual testing: Universal across all Nevada utility areas for all covered assemblies.
Find a Certified Backflow Tester in Nevada
Find CA-NV AWWA or ABPA-certified, utility-authorized testers at getyourbackflowtested.com/backflow-testing-near-me/nevada-backflow-testing — covering Las Vegas, Henderson, Reno/Sparks, Carson City, and all major Nevada markets. Note: LVVWD properties do not require independent testers.
Nevada Regulatory Reference Links
| Resource / Agency | URL / Link Target |
|---|---|
NDEP — Bureau of Safe Drinking Water | |
NDEP — CCCP Guidance Document | |
NAC 445A.67185-67255 — Cross-Connection Control | |
Las Vegas Valley Water District — Backflow Prevention | |
City of Henderson — Cross-Connection Control Program | |
Truckee Meadows Water Authority — Backflow Prevention | |
Southern Nevada Health District — Backflow Protection Program |