Since children may be at higher risk of adverse health than adults from exposure to toxic pollutants in air, food, and soil -- due to their smaller, developing bodies, and their potential for prolonged contact with soil and dust -- a child-specific exposure factors handbook has been created by the U.S. Environmental Protection Agency.

From the website: "The document provides a summary of the available and up-to-date statistical data on various factors assessing children exposures. These factors include drinking water consumption, soil ingestion, inhalation rates, dermal factors including skin area and soil adherence factors, consumption of fruits and vegetables, fish, meats, dairy products, homegrown foods, breast milk, activity patterns, body weight, consumer products and life expectancy."

The U.S. Environmental Protection Agency's Exposure Factors Handbook is a useful compilation of data relevant to the assessment of human exposure to environmental pollutants. It provides quantitative inputs for exposure models, including human activity patterns, building characteristics, and physical characteristics of humans.

Expofacts is an extensive online repository of datasets containing information on numerous exposure-related factors representative of European countries.