A toilet leaking where the porcelain base meets the floor is almost always caused by a failed, deteriorated, or compressed wax ring seal that allows flush water to escape. Other common contributing factors include loose floor closet bolts that allow the toilet to rock back and forth, breaking the watertight seal, or a cracked plastic or cast-iron floor flange that fails to support the toilet properly. Callout type="warning" title="Hygiene Warning": Wear rubber gloves when inspecting sewage and water leaks around bathroom fixtures. Verification: Check whether water appears specifically during a flush cycle, confirming a compromised wax ring seal.
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