California will soon allow water agencies to heavily treat wastewater, converting it into drinking water. The State Water Resources Control Board approved regulations to extensively treat sewage water for human consumption. Reporter: Ezra David Romero, KQEDCongressman Kevin McCarthy officially submitted his letter of resignation on Tuesday, announcing he will step down December 31.Reporter: Marisa Lagos, KQED Right now, people all over the world are sending friends and family Christmas cards and holiday gifts.  But often overlooked is the one delivering this mail, the mail carrier.Reporter: Billy Cruz, The California Report Learn more about your ad choices. Visit megaphone.fm/adchoices