Use of bottled water and filters
Three-quarters of all surveyed homes used some bottled (53%) and/or filtered (38%) water, and 32% used these exclusively. However, only one home (< 1%) had a device particularly well-suited for removing arsenic or nitrate (i.e. a reverse osmosis system). Other types of filters were more common: pitcher (15%), refrigerator (15%), kitchen tap (7%), and whole-house (5%).