Signs You Have a Leak To make sure you don’t overlook a leak, here are some common warning signs of water leaks in homes. WET SPOTS. MOLD & MILDEW. FOUNDATION CRACKS. INCREASE IN YOUR WATER BILL. WATER METER CONTINUOUSLY TICKING. If you notice any of these signs, you leak then it is best to contact an expert plumber in Aurora, CO for leak detection and repair service! Source:- lentheplumber.com