The Risk-Screening Environmental Indicators (RSEI) is a computer-based screening tool developed by the Environmental Protection Agency (EPA) that "analyzes risk factors to put Toxics Release Inventory release data into a chronic health context." The tool and this site are used by journalists, industry officials, and government regulators to examine trends, support community-based projects, and...

The Harvard School of Public Health is renowned for its fine outreach programs, and in recent years has also initiated a strong online presence. That presence includes this well-designed site (created by the Harvard Center for Cancer Prevention) which allows users to determine their potential risks for various diseases, including diabetes, cancer, osteoporosis, and strokes. By answering a few...