OxyFile #525

Water Action of Chlorine and Ozone Comparison Chart

By Tom Harrelson

Reprinted with Permission


                                 CHLORINE              OZONE


Oxidation Potential (Volts)        1.36                2.07


Disinfection-
Bacteria                           Good              Excellent
Viruses                            Good              Excellent


Carcinogen Formation               Likely            Unlikely


Organics Oxidation                 Moderate          High


Microflocculation                  None              Moderate


pH Effect                          Variable          Lowers


Water Half Life                    2-3 hours         20 min.


Operation Hazards-
Toxicity                           High              Moderate
Complexity                         Low               High


Air Pretreatment                   None              Dehumidify


OZONE Fact Sheet No. 1-H2O>1/97