Improper connections can be detected through

• A. DO tests
• B. Soundings
• C. TV inspection
• D. All of the above

Answer: (C)

Detecting improper connections is best done by visually inspecting the inside of the sewer lines. TV inspection uses a camera pushed through the sewer to view joints, laterals, and connections, so you can directly see if a lateral is properly tied into the main or if a stormwater line or other conduit is illegally connected to the sanitary sewer. This direct visualization makes it the most reliable method for spotting misconnected lines, cracks, or intrusion that other methods might miss.

Dissolved-oxygen tests measure the oxygen content in water, which helps assess treatment performance or water quality, not how pipes are connected. Soundings determine depth or distance along a line but don’t reveal how a lateral connects to the main. So they don’t reliably detect improper connections.