Tap Water Smells, Tastes or Looks Wrong? Start Here
Most smell, color and taste problems are nuisances with a simple cause. One check tells you whether it comes from your home (the water heater, one faucet, old pipes) or from the water supply, and so whether to call a plumber or your utility.
What are you noticing?
Where does it happen?
Two choices give you the likely source and who to call.
- What you’re noticing
- Where it happens
All five cases as a list
- Only the hot waterUsually points to: The water heater.What to do: A plumber or the heater manual (flushing, anode rod).
- The cold water tooUsually points to: The water coming into the home.What to do: Your utility, or a lab test on a private well.
- Every tap in the homeUsually points to: The supply or your service line.What to do: Call your utility and say when it started.
- Only one faucetUsually points to: That faucet, its aerator or the pipes feeding it.What to do: Clean the aerator; then a plumber.
- It goes after the water runs a minuteUsually points to: Water that sat in the pipes.What to do: Usually a nuisance; run the tap before drinking.
Find your utility
Your city or utility page lists the utility's phone number and website where they are on record, and the results the utility has reported.
Frequently asked
- US EPA, “Secondary Drinking Water Standards: Guidance for Nuisance Chemicals”
- US EPA, “National Primary Drinking Water Regulations”
Reviewed October 7, 2026 by the PurityMap Editorial Team. Prepared with AI assistance. General information, not medical advice. Your utility's records describe the water system, not the water at your tap. Health disclaimer · Spot a mistake? Send a correction.
When should I call my water utility?
When the problem is at every tap, started suddenly, does not clear after running the cold tap, or came with a notice. Your city or utility page here lists the utility's phone number and website where they are on record.
Which water problems are worth testing for?
A metallic taste or rusty pipes (lead and copper), brown or black water in a home with an infant (manganese), and any smell or color on a private well. Smells and colors that come from the water heater are usually nuisances.
Does PurityMap have test results for smell and color?
Not for these causes. PurityMap publishes utility records such as lead, copper, PFAS and hardness; no system record here covers sulfur, iron or manganese. Your city page shows the results that are on record.