Percentage of surface water and groundwater volumes
processed by drinking water plants, by treatment category, 2007
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|Surface water||Groundwater 1|
|percent of total water treated|
|Treatment category 2|
|Other filtration systems||19.1||10.8|
|Disinfection and other (unfiltered systems)||11.6||34.0|
|No disinfection with other treatment||0.0||2.6|
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