Ground level ozone concentrations (measured in parts per billion or ppb) varies depending on where you live. You can live in places where it is fairly low, like Oahu in Hawaii, which averages 49ppb1; or in places like Chicago, which averages 72ppb2. The national average hovers around 70ppb3, which is also the current EPA standard. The CARB-Certified OxyPure®’s Ozone filter drops the ozone concentration in your home to 1ppb, 70 times lower than current EPA limits and well below the ozone concentration you would find outside anywhere in the U.S.


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