Blue street markings typically indicate which type of utility?

Blue street markings are widely recognized as indicators of potable water utility lines. This standard is part of a color-coded system used in many jurisdictions to differentiate between various types of underground utilities. The blue color specifically denotes that the lines marked are for drinking water systems, which are crucial for public health and safety.

Understanding the significance of these markings is important for first responders, including fire service personnel, as it helps them identify and manage risks associated with utility lines during emergencies or during routine activities. Inadequate handling or unawareness of potable water lines could lead to serious consequences, including contamination or infrastructure damage.

The other options represent different types of utilities that correspond to distinct colors in the marking system. Therefore, recognizing blue markings as a sign of potable water helps ensure correct identification and prioritization for safety and regulatory compliance during work in the vicinity of such utilities.