Who regulates CNG operations in Texas?

The Texas Commission on Environmental Quality (TCEQ) is the primary regulatory body overseeing compressed natural gas (CNG) operations in Texas. This agency is responsible for ensuring that environmental standards are met and that operations involving CNG comply with state regulations to protect air and water quality. TCEQ's role includes issuing permits, conducting inspections, and enforcing compliance with environmental laws, which are essential for the safe management and use of CNG as an energy source.

The other entities listed do not have the same level of authority over CNG operations. The Texas Department of Water Resources primarily handles issues related to water management. The Texas Energy Commission focuses on energy conservation and promotion rather than direct regulation of CNG. The Texas Transportation Safety Board is concerned with safety in transportation but is not specifically tasked with regulating natural gas operations. Therefore, TCEQ's comprehensive regulatory framework makes it the correct answer for oversight of CNG activities in Texas.