People in Stockton receive their drinking water in a variety of ways.
North of the Calaveras River, the water comes from the city's Delta Water Treatment Plant, which uses chlorine to disinfect and kill bacteria, viruses, and microorganisms.
Stockton Municipal Utilities Director Dr. Mel Lytle says the new process is safer and will combine chlorine with ammonia.
"That forms a chloramine which is a much more stable chemical that allows for disinfection as well as it prevents the formation of disinfection byproducts," says Lytle.
Lytle says customers should notice no difference in taste, odor, or color.
He says the process is used in the East Bay, Southern California and in Tracy.