This site from the United States Environmental Protection Agency (EPA) features a host of resources about water and water-related issues. With many helpful articles available under categories such as Drinking Water, Education & Training, Laws & Regulations, Our Waters, Pollution Prevention & Control, Science & Technology, Water Infrastructure, and others, the site is a welcome reference for readers who want to know more about water and the treatment of water resources in the U.S. For instance, the Our Waters section reveals a list of how the EPA demarcates different types of water, from Drinking Water to Ground Water to Rivers & Streams. The page explains each type in a sentence or two, then links to a more in-depth explanation, complete with additional links and resources.