of water with no chemical additives or residuals ozone residual also inhibits bacteriological growth on the outside of the carbon filter 87 in the following stage lastly the system 39 s non bypass filter design ensures that before leaving the unit every drop of water is forced through the extruded carbon block filter 87 in chamber 86 extruded carbon block does not allow channeling or bypass a common trait among granular activated carbon filters again the water swirls around and through the filter it is introduced outside the filter and withdrawn from inside the filter the filter removes the bacteria and virus destroyed during the o 3 uv process further improving the taste odor and drinkability of the water it also substantially reduces total organic carbon lead both soluble and insoluble chlorine and trihalomethanes the extruded carbon block post filter exceeds the national sanitation foundation 39 s standards for turbidity and reduction of such cysts as giardia lamblia and cryptosporidium the absence of any filter in the ozone uv advanced oxidation chamber 69 increases the exposure time of the incoming water to ozone and uv radiation by 30 over earlier units that combined a filter with uv radiation and ozone exposure resulting in better performance than these earlier units this improvement has eliminated several components that made assembly service and maintenance of the earlier unit slower and more difficult the elimination of the filter from within this chamber makes the visual presentation of the system even more impressive since the entire chamber interior can be seen.