CARB is a California state government agency that regulates air-pollution-generating activities. The board supports several research programs, notably the Indoor Air Quality and Personal Exposure Assessment program.

CHAD is a database that includes many useful activity pattern data sets, and can be downloaded from the USEPA website. It includes the National Human Activity Pattern Survey (NHAPS) data.

From the website: " [The] Consolidated Human Activity Database (CHAD) contains data obtained from pre-existing human activity studies that were collected at city, state, and national levels. CHAD is intended to be an input file for exposure/intake dose modeling and/or statistical analysis. CHAD is a master database providing access to other human activity databases using a consistent format. This facilitates access and retrieval of activity/and questionnaire information from those databases that EPA currently has access to and uses in its various regulatory analyses ...."

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.

The U.S. Center for Disease Control (CDC) provides valuable exposure information on Americans for a wide variety of environmental chemicals.

From the website: "The National Report on Human Exposure to Environmental Chemicals provides an ongoing assessment of the U.S. population's exposure to environmental chemicals using biomonitoring. Biomonitoring is the assessment of human exposure to chemicals by measuring the chemicals or their metabolites in human specimens such as blood or urine."

The SimSmoke.Org website hosts on-line tools for simulating exposure to secondhand tobacco smoke in a variety of locations, including homes, cars, bars, restaurants, etc. The models can be executed from your web browser.

The U.S. federal government has created an in-house exposure simulation model for particulate matter with sophisticated sampling features.

From the paper abstract: "The US EPA National Exposure Research Laboratory (NERL) has developed a population exposure and dose model for particulate matter (PM), called the Stochastic Human Exposure and Dose Simulation (SHEDS) model. SHEDS-PM uses a probabilistic approach that incorporates both variability and uncertainty to predict distributions of PM exposure, inhaled dose, and deposited dose for a specified population."

U.S. Environmental Protection Agency model for predicting indoor air quality and exposure in multi-zone residential locations. Contains embedded empirical data inputs on air flows between rooms.

A study of multifamily buildings that produced valuable data on inter-unit air flows. From the website: "This project included in-depth owner interviews, a survey of a large sample of renters, legal research and measurements of the movement of PFTs and SHS tracers between units in apartment buildings before and after air sealing and ventilation treatments. The project produced some of the most extensive multiple fan measurements of inter-apartment air leakage and multiple tracer gas measurements of inter-apartment air transfer. It also developed a new metric of 'effective contaminant transfer' which is used to define the magnitude of the transfer of a contaminant source to the monitored location."

BioMed Central publishes a wide variety of open-access journals in biology, medicine, and public health.

From the website: "BioMed Central is an independent publishing house committed to providing immediate open access to peer-reviewed biomedical research." "BioMed Central's portfolio of 175 journals includes general titles such as Journal of Biology alongside specialist journals (e.g. BMC Bioinformatics, Malaria Journal) that focus on particular disciplines."