Can a Pool Leak Cause a Sinkhole? Yes — and Here’s Why

It sounds dramatic, but pool leaks can absolutely contribute to sinkhole formation — especially in Arizona’s unique soil conditions.

How Sinkholes Form

When water from a pool leak saturates the soil beneath and around your pool, it can wash away supporting material. In areas with caliche or limestone, this erosion can create underground voids that eventually collapse.

Arizona’s Soil Makes It Worse

Much of the Phoenix Valley sits on a mix of caliche, clay, and fill dirt. When constant water flow from a leak hits these layers, the soil can erode, shift, and compact unevenly.

Warning Signs

• Cracks appearing in your pool deck or nearby structures
• Uneven settling of the ground around your pool
• Doors or windows that suddenly don’t close properly
• Depressions forming in your yard near the pool

Prevention

The best prevention is early leak detection. If your pool is losing water, don’t wait. Call Leak Science at 480-794-0959 to find and fix the leak before it causes structural damage.