AI Article Synopsis
- The study highlights that existing data on drinking water intake is insufficient for estimating short-term exposure to contaminants.
- A nationwide survey collected detailed information on when and how much water people consume, finding significant variations based on age, sex, and geography.
- Results indicate that most individuals drink water 6 times or less daily, with average consumption amounts showing minimal correlation to the frequency of drinking occasions.
Article Abstract
Data currently available on drinking water intakes do not support dietary exposure estimates for contaminants that have acute effects lasting less than 24 h. Realistic exposure estimates for these types of contaminants in drinking water require detailed information on amounts and time of consumption for each drinking occasion during a day. A nationwide water consumption survey was conducted to address how often, when, and how much water is consumed at specific times during the day. The survey was conducted in two waves, to represent two seasons, and the survey instrument consisted of 7-day water consumption diaries. Data on total daily amounts consumed, number of drinking occasions per day, amounts consumed per drinking occasion, and intervals between drinking occasions show larger between-subjects variation than within-subject variation. Statistically significant associations were also observed between drinking water consumption patterns and participants' ages and sex and geographical regions in which these participants live. The number of drinking occasions on a given day varied from 0 to 19, with the majority of respondents reporting 6 or less drinking occasions per day. The average interval between drinking occasions varied from 1 to 17 h, with 57% of the person-days reporting average intervals at least 3 h apart. The mean amount consumed per drinking occasion showed little association with the number of drinking occasions and fluctuated between 8 and 10 oz. To our knowledge, this survey is the only source of information on within-day patterns (i.e., when and how much) of drinking water consumption for a nationally representative sample of the US population. The detailed water consumption data from this survey can be used to support less than 24-h dietary exposure estimates for contaminants in drinking water.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2847804 | PMC |
| http://dx.doi.org/10.1038/jes.2008.28 | DOI Listing |
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