Which agency is responsible for regulating utilities in Louisiana?

The Louisiana Public Service Commission is the agency tasked with regulating utilities in the state. This includes overseeing electric, natural gas, water, and telecommunications services. The commission's responsibilities involve ensuring that utility rates are fair, that services are reliable, and that companies comply with applicable laws and regulations. It acts as a regulatory body to protect the interests of consumers while also facilitating a fair environment for utility providers.

In contrast, the other agencies listed serve different functions. The Louisiana Department of Transportation primarily focuses on maintaining and improving the state's transportation infrastructure. The Louisiana Department of Environmental Quality deals with environmental protection and regulation of pollutants, ensuring that natural resources are preserved and managed responsibly. The Louisiana Secretary of State oversees various administrative functions, including election management and business registration, rather than utility regulation.

Thus, the designation of the Louisiana Public Service Commission as the regulator of utilities makes it the correct choice for this question.