Is brown or yellow tap water safe to drink or shower in?

For most healthy adults, a glass of lightly tinted water is not a health risk. The reasons come straight from the agencies that set the rules.

Iron is the usual cause, and it is not a health threat. The EPA's secondary standards cover things that change how water looks, tastes and smells. The EPA does not enforce these limits and calls them guidelines for "aesthetic considerations, such as taste, color, and odor." Its guideline for iron is 0.3 milligrams per liter, and above that the listed effects are "rusty color; sediment; metallic taste; reddish or orange staining." Penn State Extension puts it bluntly: "Iron and manganese are not health concerns in drinking water." The EPA even explains why it bothers with these guidelines. Colored water can make people stop drinking tap water "even though the water is actually safe to drink."

City disturbances come with disinfectant. When crews fix a main or open fire hydrants nearby, sediment gets stirred up. Phoenix says visible particles are generally iron or minerals that were stirred up, and that the water "is safe to drink because disinfectant remains in tap water." The city checks disinfection levels when its own pipes are the cause, and it may flush hydrants to clear the line. It says clearing can take several hours.

Phoenix water starts out low in iron. The city's 2025 water quality report lists iron at not detected to 30 parts per billion. The guideline is 300. So when a Phoenix tap runs brown or yellow, the iron usually came from pipes along the way, either city mains during a disturbance or the plumbing in your own house. Our page on why tap water turns brown walks through those causes.

### Who should wait for clear water

Phoenix names the groups that should be more careful. It says people with severely compromised immune systems, infants and some elderly people may be at increased risk, because cloudiness can interfere with disinfection. The city says these people should ask their health care providers about drinking the water. If that's your household, use bottled water until the tap runs clear.

Manganese is the other exception. It tints water too. The EPA's guideline is 0.05 milligrams per liter, and its listed effect is a "black to brown color." Unlike iron, manganese can matter for health at higher levels. The Minnesota Department of Health says infants "may develop learning and behavior problems if they drink water with too much manganese in it." It sets a guidance value of 100 micrograms per liter for homes where an infant drinks tap water or formula made with it. You can't tell iron from manganese by looking at a glass. If dark brown water keeps coming back and a baby drinks the water, get it tested.

### Color tells you nothing about lead

The color tells you nothing about lead, one way or the other. Phoenix's water quality report says lead in drinking water "is primarily from materials and parts used in service lines and in home plumbing." Phoenix's FAQ passes on the EPA's point that homes built before 1986 are more likely to have lead pipes, fixtures and solder. If your house is that old, don't use the color as your guide. Test instead. Our guide on how to test home water for lead covers the steps.

The same report gives advice that works for any discolored water. Use only cold water for drinking, cooking and baby formula. Before drinking, flush your pipes for several minutes by running the tap, taking a shower, or doing laundry or dishes. Boiling does not remove lead.

Yes, for nearly everyone. Showering is where the answer is the clearest.

• Phoenix says discolored water can generally be used for drinking, showering, flushing toilets and cleaning floors.
• Manganese: the Minnesota Department of Health says water above its manganese guidance "can be harmful for your health, but taking a bath or a shower in it is not."
• Lead: the EPA says bathing and showering "should be safe for you and your children, even if the water contains lead over EPA's action level." It adds that human skin does not absorb lead in water.

The real risk in the shower is to your towels, not your skin. Iron leaves reddish or orange stains, and manganese leaves black ones, per the EPA's list. Phoenix recommends skipping laundry while water is discolored. If you must wash, use a rust stain remover or regular detergent. Don't use chlorine bleach, because the city says it "will react with the iron to form a permanent stain." That one tip saves a lot of white shirts.

Yellow is usually the same story as brown, just lighter. The EPA says metals are common causes of color, and it lists iron, manganese and copper among the standards related to color. The EPA also says color "may be indicative of dissolved organic material," which is one more reason a tint that won't go away is worth a test.

Where the yellow shows up is the best clue.

• Cold and hot both yellow, and neighbors too: the supply is the likely source. Phoenix says the city's lines are the likely cause when a change comes on suddenly after crew work or hydrant flushing.
• Cold and hot both yellow, only your house: look at your own pipes. Phoenix says discoloration may come from aging pipes, especially when it shows up on first use in the morning. If your home has older galvanized steel lines, our page on galvanized pipe problems explains what to look for.
• Only the hot water is yellow: look at the water heater. A. O. Smith, a major water heater maker, lists "rusty, brown, black, or yellow water appearing in the hot water" as a known symptom. Its bulletin says a tank lining failure bad enough to do this is rare. It says the most common cause of rusty water is a "non-toxic iron reducing bacteria." Those bacteria like water with elevated iron and manganese, little oxygen, and temperatures below 138°F. Water softeners and long periods without water use raise the odds, per the same bulletin. The maker's fix is shock chlorination, and it says heaters with this problem usually need new anode rods. Flushing sediment helps too, and our schedule for how often to flush a water heater in Phoenix gives the timing.

A white cup makes this easy. Fill one from the cold side and one from the hot side, then set them side by side on the counter. Two minutes of looking tells you where to aim.

Start with the simple steps.

1. 1Run one cold tap. A tub spout or hose bib works well. If the water clears in a few minutes, you're done.
2. 2Check with a neighbor. If they have the same color, the cause is almost certainly on the city side. Wait it out, since Phoenix says clearing can take several hours.
3. 3Stay off the hot tap until it clears. This is a practical step, not a city rule. It keeps stirred-up sediment from settling in your water heater.
4. 4Hold the laundry. No bleach on iron stains.
5. 5Use bottled water for infants and anyone medically fragile until the water is clear.

Call Phoenix Water Services at 602-262-6251 on weekdays from 8 a.m. to 5 p.m., or 602-261-8000 on weekends, holidays and weekday evenings, if the color arrives suddenly and does not clear. Phoenix says that if tap water is not safe to drink, its staff will visit your address, and a large event gets posted on phoenix.gov and sent to the media. Other Valley cities list their own numbers on their water pages. Not sure which side of the meter the problem is on? Our guide to whether bad water is the city's problem or yours sorts that out.

Call a plumber when the color comes back every morning, when only the hot water is tinted, or when you also see black specks in the water or falling pressure. Those point to corroding pipes, rubber parts breaking down, or a water heater that needs work. HQ Plumbing & Air repairs and replaces water heaters and installs water filtration, and we're licensed and insured. You get an upfront price before any work starts, and the estimate is free.