Phoenix can charge a civil penalty of up to 1,000 percent of your water charges for each billing period until the problem is fixed, and it can shut off water. Shutoff takes ten days' written notice, or none if the city sees a health hazard. The city can also install the assembly itself and bill you for it.
“the Director may impose a civil penalty of not more than 1,000 percent per billing period on the charges for all water used”
- Applies to:
- Owners, property managers and tenants on Phoenix city water who have a required backflow assembly
- Official fee:
- not applicable; penalties are set by City Code 37-146
- In force:
- Phoenix City Code Chapter 37, Article XII (Ord. G-6741, 2020)
- Last verified:
- September 29, 2026, against the official page
Most backflow problems in Phoenix start as paperwork, not plumbing. A test that was never filed or a device that was moved can trigger the enforcement section of the city code. It is written with real teeth, and the numbers are large.
What does the Phoenix code say?
Section 37-146 gives the Water Services director four tools:
- Civil penalty: the director "may impose a civil penalty of not more than 1,000 percent per billing period on the charges for all water used beginning from the date the corrective action was required and until the corrective action has been completed by the customer." The clock runs from the date the corrective action was required.
- City-installed assembly: if a situation that would end service is not fixed in the time the termination notice gives, "the Director may install a backflow prevention assembly at the customer's point of service delivery and bill the customer for all costs, together with all applicable penalties."
- Publication: the director may publish, in the city's largest daily newspaper, the customers who violated the article in the past 12 months, with a summary of the enforcement action.
- Shutoff: if the Planning and Development director asks, the director may terminate water service when the customer does any of these: fails to properly locate, install, test or maintain a required assembly; removes or bypasses one without approval; allows a cross connection; fails to submit test and repair records on time; fails to follow the written backflow policy on file with the City Clerk; or violates A.A.C. R18-4-215.
How much notice do you get?
Shutoff "will be immediate and without prior notice if the Director determines that the customer's water system may cause a health hazard to the public potable water supply." Otherwise the director gives ten days' written notice to the service address. Service returns when the condition is fixed to the satisfaction of the Planning and Development director, and the customer must pay all costs, fees, expenses, surcharges and penalties for the shutoff and restoration first.
Can you appeal?
Section 37-145 says an action or decision of the Planning and Development director may be appealed to the Development Advisory Board under Chapter 2, Article IX of the city code.
What do the key terms mean?
- Billing period: the water bill cycle. The penalty is computed on the water charges for each cycle the violation runs.
- Corrective action: what the Planning and Development director required, such as a test, a repair or an installation.
- Termination: the water shutoff.
Who does this cover?
Any customer, meaning whoever controls the water system, who has a required assembly. Commercial accounts are the usual targets because they carry the assemblies, but the wording is not limited by property type.
Quick check: which violation leads to which remedy?
| What happened | What the code allows |
|---|---|
| Annual test not done or not filed | Penalty of up to 1,000 percent of water charges per billing period, and shutoff on ten days' notice |
| Assembly removed or bypassed without approval | Shutoff, and the city may install one and bill you |
| Cross connection found | Shutoff, immediate if it may be a health hazard |
| Shutoff notice ignored | City installs an assembly at the meter and bills all costs and penalties |
| A ruling you disagree with | Appeal to the Development Advisory Board |
What does this look like in real life?
- A restaurant misses the filing date. The test was done but the form never reached the city. Failing to submit records on time is its own ground for shutoff, so file the result on the city form as soon as the gap is found.
- A tenant removes the assembly during a build-out. Removal without approval is a shutoff ground, and a city-installed assembly plus penalties is what the code allows if the notice is ignored.
- An inspection finds a possible health hazard. If the director decides the water system may be a health hazard, notice is not required. A missed test with no hazard finding gets the ten days' written notice.
What should you do next?
- 1Pull the last passing test date for every assembly and confirm the city has the filing.
- 2If a corrective action notice arrived, note the date it was required, since the penalty runs from there.
- 3Have a certified repairer fix the assembly, retest it and file the passing result on the city form.
- 4If you think the decision is wrong, file the appeal with the Development Advisory Board.
- 5Keep the notice and the test forms together. The code requires test records to be kept at least three years.
What do people get wrong?
- "Shutoff always comes with a warning." The code allows immediate shutoff for a possible health hazard.
- "The penalty is a flat fine." It is a percentage of the water charges for each billing period it continues.
- "Removing the assembly avoids the test." Removal or bypass without approval is itself a shutoff ground.
- "The tester is responsible for filing." The duty is on the customer.
How Do Other Valley Cities Handle It?
| Where | What applies | Source |
|---|---|---|
| Mesa | Mesa can end service for a missing, bypassed or untested assembly, or late test records, and issues an immediate termination notice if there is an imminent hazard. Court civil sanctions run from $100 to $1,000 per violation, and each day is a separate offense. A backflow compliance late fee applies on top. | Mesa City Code 8-1-13 and 8-1-16 Verified September 29, 2026 |
| Chandler | Chandler may discontinue service if a required device is not installed, tested and maintained, has been removed or bypassed, or an unprotected cross connection exists, and service is not restored until it is corrected. Before shutoff the customer gets written notice and a chance to meet with staff, but service can end immediately if there is immediate danger to public health. | Chandler City Code 52-36(A) and 52-38 Verified September 29, 2026 |
This page explains the rule. The official text at the source above governs.
Backflow Prevention in Other Cities
- ChandlerChandler City Code 52-36: backflow assemblies on commercial building plans
- GilbertGilbert Town Code 10-92(c): which backflow assembly does your kind of property need?
- GlendaleGlendale City Code 33-90: which businesses need a backflow device
- GlendaleGlendale City Code 33-92: backflow devices on fire sprinkler services
- GlendaleGlendale City Code 33-94: annual backflow test, records and shutoff
- MesaMesa City Code 8-1-10: backflow rules for fire sprinkler systems
More Phoenix Codes and Permits
- Backflow PreventionDo you need a permit to install or replace a backflow preventer in Phoenix?
- Backflow PreventionCan you connect city water to a well or other water source in Phoenix?
- Backflow PreventionWhat backflow duties does a Phoenix property owner have?
- Backflow PreventionWhere must a backflow preventer be installed at a Phoenix property?
- Backflow PreventionWhich Phoenix businesses need a backflow preventer, and which type?
- Permits and InspectionsWhich building and plumbing codes does Phoenix enforce?
