Government-operated and nonprofit Web sites that can help you learn more about healthy homes and home environmental hazards.

U.S. Environmental Protection Agency
The EPA has a high-quality consumer-friendly Web site that's packed with information about energy-efficient homes, radon, household waste management, recycling, lead-based paint, indoor air quality, safe drinking water, backyard pesticides, asbestos and other topics. More than a dozen publications about radon alone are available, including "Home Buyer's and Home Seller's Guide to Radon," "A Radon Guide for Tenants" and "Building a New Home? Have You Considered Radon?"

Health House
The American Lung Association of Minnesota developed the Health House Web site to raise the standards for indoor air quality and energy efficiency in newly built homes. Features include information about home pollutants and tips on how to build a healthy house.

National Safety Council
The National Safety Council educates the public about a wide variety of safety-related issues in the home, workplace and community. The council's Web site has information about indoor air quality, lead poisoning and hazardous chemicals. There also are order forms to purchase a short-duration or long-duration home radon test kit from an EPA-approved manufacturer.

U.S. Department of Housing and Urban Development
HUD's extensive Web site is packed with consumer information about housing and home-buying. In particular, "Bookshelf10" in HUD's "Reading Room" is the place to find information about lead-based paint regulations and links to related resources. HUD's Office of Lead Hazard Control, www.hud.gov/lea/leahome.html, is also a useful resource.

American Homeowners Association
A good resource for general homeowner information about a wide variety of subjects is the American Homeowners Association's Web site, which has lengthy lists of books, magazines, videos, articles and Web resources about home safety. Rather than providing in-depth technical data, these resources focus on do-it-yourself tips and practical ideas.