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.
Public utility commission decisions can be found in the following databases:
Public Utilities/Public Service Commission Decisions available for almost all states - Browse Sources > Search Sources > Public Commission Decisions
Public Utilities Reports: available for all 50 states
State public utility commissions also issue regulations related to energy distribution. None of the standard legal research databases has state regulation databases limited to the topic of energy regulation. Consult the full regulation databases for individual states:
Individual States (Browse Sources > Search Sources > Filter to Administrative Codes and Regulations > Administrative Codes)
Bloomberg Law: Browse individual state resources to locate State Administrative Codes
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.