Exterior Underground Leak Detection & Line Location

SoCal Sewer and Water provides exterior underground water leak detection and line locating for buried water services and other exterior piping. Underground leaks can occur beneath lawns, landscaping, driveways, parking areas, sidewalks, and other surfaces while remaining hidden for long periods. Professional detection helps identify the route of the pipe and narrow down the suspected failure before excavation begins.

Signs of an Underground Water Leak

Common indications include:

• High water bills
• A meter that keeps moving
• Low water pressure
• Wet soil during dry weather
• Pooling water
• Soil erosion
• Unusually green vegetation
• Water appearing through concrete

The wettest area is not always directly above the leak because water can travel through soil before reaching the surface.

Locating Underground Water Lines

Older properties may have limited records showing where water piping was originally installed. Depending on materials and site conditions, electronic locating can help identify the route of compatible piping or tracing components. Once we understand the pipe route, leak-detection work can focus on a smaller area.

Underground Leak Detection

Methods may include:

• Meter testing
• Pressure testing
• Acoustic detection
• System isolation
• Electronic locating
• Surface evaluation

The purpose of underground leak detection is to reduce the search area so excavation can be more targeted.

Detection methods cannot provide identical accuracy under every condition, but they can greatly improve repair planning.

Repair or Replacement?

A localized leak in otherwise sound piping may be suitable for spot repair. Multiple previous repairs, severe corrosion, deteriorated materials, or undersized water service can make replacement more practical. SoCal Sewer and Water considers the history of the line rather than looking only at the newest leak.

Residential and Commercial Applications

Commercial properties can contain complicated underground water networks around parking lots and buildings. For homes, avoiding unnecessary excavation can protect landscaping and hardscape. In both situations, good diagnosis helps move efficiently from “we are losing water somewhere” to a specific and practical repair plan.