Water problems
Is Cloudy Tap Water Safe? Air Bubbles, Sediment, or Something Else
Cloudy tap water is often harmless air bubbles, but not always. Learn how to tell the difference and when to call your utility or test your well.
Cloudy water can have a harmless explanation, but a photo cannot reliably determine its cause. Tiny air bubbles may make water look milky and then clear as the water sits. Sediment, plumbing work, pressure changes, or a source-water issue can look different and may require further investigation.
Fill a clean, clear glass and observe whether the cloudiness clears from the bottom upward or remains. Compare cold and hot water, and check more than one faucet. These observations can help distinguish a temporary air effect from a persistent change, but they do not test for contaminants that are invisible.
If the change is sudden and widespread on municipal water, contact the utility and check for advisories. If you use a private well, the CDC recommends testing when water changes in appearance, taste, or smell and after events such as flooding or well repairs. Annual well testing is also recommended for key indicators. CDC well-water guidance (opens in a new tab)
Do not rely on a household filter to make water safe during a boil-water advisory or known contamination event unless public-health officials confirm that the particular device and use are suitable. Different devices address different risks. If there is a public advisory, follow the utility or health department instructions.
