To verify the suitability of a proprietary aerobic treatment unit for surface application disposal, it must be listed by which organization?

The correct answer, which is the Texas Commission on Environmental Quality (TCEQ), is significant because it specifically regulates and oversees environmentally sensitive issues in Texas, including the approval of treatment units for sewage and wastewater treatment systems within the state. When it comes to proprietary aerobic treatment units intended for surface application disposal, TCEQ’s approval ensures that the units are effective and safe in treating wastewater to protect public health and the environment.

Proprietary systems must meet state standards, which TCEQ establishes based on scientific data and testing. This approval process is critical to guarantee that the products used in Texas adhere to local regulations and effectively manage wastewater in a manner that is environmentally responsible.

The other organizations mentioned, like the EPA, provide overarching national guidelines and regulations, but they do not specifically approve individual systems at the state level; instead, individual states like Texas rely on TCEQ to implement and enforce standards that work within their unique environmental contexts. The Local Health Department plays a role in health and safety but does not typically issue approvals for proprietary treatment systems. The National Sanitation Foundation (NSF) is involved in standards and testing but focuses more on the certification process rather than regulatory approval for particular applications or disposal methods.

Thus, the correct choice reflects