Got rust? This oxidized iron occurs naturally in some drinking water sources and can also come from old, corroded pipes. While it may look and taste unpleasant, the reddish-brown liquid is not a threat to your health.
Unless you’re certain your plumbing does not contain lead, never use hot tap water for cooking or drinking. Hot water is far more likely to leach lead from pipes, especially if it has been standing in the pipes for a while.