City of Milwaukee to Ozonate its Public Water Supply In November, the City of Milwaukee approved an 89 million dollar program to update the filtering system and to add ozone to both of the water treatment plants. The cost of updating water purification with ozone will be 51 million with an additional 38 million for a new filtration system. The Milwaukee Sentinel reported that ozone kills cryptosporidium, bacteria, fungus and viruses. The decision to approve the ozone disinfection project was widely approved in the local PWA community. The Milwaukee AIDS Project has advised its clients not to drink the city water for the past 2 and 1/2 years or any other public water supply. Nearly 100 MAP clients have died from Cryptosporidium since the outbreak. Cryptosporidium is a protozoan that causes diarrhea. Source: Positive Health News - Report No. 7