Government agencies are major sources of environmental information. Laws, regulations, baseline studies, technical papers, consumer information—all these kinds of resources, and more, are produced by governments at all levels.
In this page's righthand column, you'll find links to major websites within the main federal environmental agency, the EPA, and links to government-provided databases in the environment and energy. In this column there's a box with other important government links, followed by a box of links to Texas environmental agencies, and boxes with links to San Antonio government offices and regional water-related agencies.
The EPA has a vast web presence but offers various means of navigating it. For basic information check out their "Learn the Issues" tab. More detailed scientific information on a variety of subjects is under "Science and Technology." There's also an interactive map for finding information by geographic area. Some major subsidiary sites of EPA are: