It depends on where bad water starts. In Phoenix, the water meter is the line. The city handles mains up to the meter, and the owner handles pipes, fixtures and filters after it. A sudden change neighbors share points to the city. A problem in one house, one tap or only hot water points to your plumbing.
Where does the city's responsibility end?
Phoenix spells this out. In its household plumbing tips, the city says it "is responsible for repairing all leaks, broken pipes, and water mains on the city, or street side of the water meters." Leaks and breaks on the customer's side are the property owner's job. The city's own words: "The water meter is what separates city and private property in determining who is responsible for leak repairs."
Its service issues page draws the same line for pressure problems. "Issues on the city's side (from the street to the water meter) are the responsibility of the City and issues after the water meter are the responsibility of the homeowner." The city also says it does not regulate water pressure beyond the meter on the customer's side. It requires a pressure regulator on your side of the meter to keep pressure at 80 psi or less, and that regulator is yours to maintain.
Water quality follows the same split, with one twist. The city treats and tests the water and delivers it to your meter. After that, your pipes and gear can change it. Phoenix says "private plumbing lines in your home or business and the use of filtration systems may affect these aesthetics significantly." Its water quality report adds that the city "cannot control the variety of materials used in the plumbing in your home." So the city answers for the water it sends. Your plumbing answers for what happens to it on the way to the glass.
One more rule matters here. The meter and its box belong to the city, so don't touch them. Phoenix says shutting water off at the meter "requires a special tool and you may be held responsible for any repairs to a damaged water meter." Use your house shut-off valve instead.
Other Valley cities set their own rules and phone numbers. Most post them on their water department pages, so check yours before you assume the Phoenix split applies.
How can you tell which side the problem is on?
Run these five checks in order. They take about ten minutes, and they're practical steps, not city rules.
- 1Ask a neighbor or two. If they have the same color, taste or smell at the same time, the cause is outside your property. Phoenix says the city's lines are the likely cause when a change comes on suddenly, especially after crews have worked in the area or fire hydrants were opened.
- 2Test the hose bib nearest the meter. That outdoor faucet usually gets water before most of your house plumbing does. If it runs clear and good while inside taps don't, the problem is past that point, inside your system.
- 3Compare hot and cold. Fill a clear glass from each. A problem in the hot water only points at the water heater, which is always on the owner's side.
- 4Try several faucets. One bad tap points at that fixture, its supply line or its aerator. Every tap bad points at the supply or the main line into the house. Our page on low flow from one faucet covers the single-fixture case.
- 5Note the timing. Phoenix says discoloration "may be from aging pipes in your home or business, especially if it occurs upon first use in the morning." Water that runs off for a minute each morning and then clears is a house-side sign.
### Clues by symptom
| What you notice | Most likely side | Why |
|---|---|---|
| Brown or cloudy water after nearby crew work | City | Phoenix links sudden changes to work on its lines and hydrant flushing |
| Brown or yellow water first thing each morning | Yours | Phoenix points to aging pipes in the home |
| Discolored hot water only | Yours | The water heater sits on the owner's side |
| Blue-green stains or a metallic taste | Yours | The EPA links copper corrosion to blue-green staining |
| Bad taste only from the fridge or a filter | Yours | Phoenix says filters and private plumbing affect taste |
| Musty or earthy taste in late summer or fall | City source, harmless | Phoenix ties it to canal algae |
The EPA backs up the corrosion clue. It says the corrosion of iron and copper "may stain household fixtures and impart objectionable metallic taste and red or blue-green color to the water supply." Copper plumbing inside a home is on the owner's side, so our page on blue-green stains in a sink or tub is the next stop for that one.
Is a bad taste or smell the city's water or your plumbing?
Both are possible, and Phoenix is open about the city's part. The city says taste and odor changes are often seasonal, stronger near fall, because of algae in the canals that carry water to its treatment plants. It says the algae are removed during treatment, but the scent may remain. The chlorine used to disinfect the water can also affect taste and smell. Phoenix calls these "harmless, aesthetic aspects that some consumers may notice," and notes that taste, odor and hardness are not regulated under drinking water health standards. If it's a pool-water note, our page on why Phoenix water tastes like chlorine explains it.
Your side can cause taste trouble too. A filter past its service life, a fridge line, or a water heater can all change what comes out of the tap. Phoenix's advice is to change filters according to the manufacturer's instructions. Its water quality report warns that ignoring a home treatment system's operation and maintenance instructions "can result in potentially unsafe water." That's the kind of house-side problem the city can't fix for you.
For a quick taste fix, Phoenix suggests a slice of lemon, or leaving a container of water uncapped for 30 to 60 minutes and then chilling it in the refrigerator. If a taste shows up only in hot water, or only from one filter, the fix is on your side of the meter.
Hardness is a special case. The city's report lists Phoenix water at 10 to 17.6 grains per gallon. The minerals come from the source, but the scale they leave builds up in your pipes, faucets and water heater. Treating it is the owner's call.
Who do you call, and what will they do?
Call the city first when: neighbors share the problem, it started suddenly, or crews are working nearby. Phoenix takes water quality concerns at 602-262-6251 on weekdays from 8 a.m. to 5 p.m. or by email at WSDCompliance@phoenix.gov. For urgent problems after hours, the city lists 602-261-8000. When its own pipes cause discolored water, Phoenix says it checks disinfection levels and may flush water from nearby hydrants, and that clearing may take several hours. If tap water is ever unsafe to drink, it says staff will visit affected addresses and post notices on phoenix.gov.
Call a plumber when: the problem is inside one house, keeps coming back each morning, affects only hot water, or comes with stains, specks or falling pressure. If you see black specks in the water, that's almost always a house-side part. For worries about lead, Phoenix says customers can contact the Arizona Department of Health Services for a list of certified labs, and our guide on testing home water for lead walks through it. If you just want to know whether discolored water is okay to use while you sort this out, see whether brown or yellow tap water is safe.
Once you know it's your side, the job is finding the part that's failing. HQ Plumbing & Air handles house-side plumbing, water heater repair and replacement, and water softening and filtration. We're licensed and insured, and we give you an upfront price before we start. The estimate is free.