States typically regulate public utilities through public utility commissions. Contact information for and links to the web sites of all state public utility commissions are available from the National Association of Public Utility Commissioners web site.
The Google site command is a very effective way to search through specific state websites, or through specific domains (.gov, .org, etc). In fact, using the Google site search is usually the easiest way by which to find information on federal and state government websites.
It's a very simple search technique using the "site" command, as shown below.
This search will look for the terms "fracking" and "oklahoma" within the Department of Interior website. Simply identify the particular URL for the website you want to search and then use the site: command to search only through that particular website.