Which state agency is responsible for regulating OSSF?

The correct choice is B, with the Texas Commission on Environmental Quality (TCEQ) being the agency that regulates On-Site Sewage Facilities (OSSF) in Texas. TCEQ has the authority and responsibility for overseeing the design, installation, and maintenance of OSSF systems to ensure they meet health and environmental standards. This includes permitting, compliance, and enforcement related to the management of these systems, as well as providing guidelines that promote safe and efficient treatment of wastewater.

In contrast, the Environmental Protection Agency (EPA) is a federal agency focused on environmental protection at the national level, but it does not specifically regulate on-site sewage systems at the state level. The Centers for Disease Control and Prevention (CDC) primarily deals with public health matters and is not directly involved in regulating sewage systems. The U.S. Department of Agriculture (USDA) is focused on agriculture and farming and does not pertain to the regulation of sewage facilities. Therefore, TCEQ is the correct agency that oversees OSSF regulations in Texas.