About MWW Account Information Customer Service Business Services Use Water Wisely
We treat Lake Michigan water at two plants, passing the water through multiple treatment process barriers that keep illness-causing microorganisms from our drinking water.
The primary form of disinfection is ozone gas which is bubbled through the lake water after it enters the treatment plants. This highly reactive gas destroys illness-causing microorganisms, controls taste and odor, and reduces chlorinated disinfection byproducts. Following inactivation of microorganisms, the processes of coagulation, settling, and biological filtration remove additional particles.
View our treatment process diagram (English and Spanish).