The presence of a milky or unclear appearance in drinking water sourced from a faucet often indicates the presence of air bubbles. This phenomenon is typically transient and harmless, resulting from changes in water pressure or temperature as water travels through pipes. The dissolved gases become less soluble and are released, creating tiny bubbles that scatter light and give the water a cloudy look. Similar effects can be observed when carbonated beverages are opened, releasing dissolved carbon dioxide.
Understanding the cause of this cloudiness can prevent unnecessary alarm and wasted resources. Historically, similar conditions have been mistaken for contamination, leading to costly water testing and treatment. Recognizing that the cause is frequently just dissolved air avoids these expenses. The temporary nature of the cloudinessthe water typically clears from bottom to top within minutesfurther reinforces its benign character.