Slab Leak Detection and Repair in Scottsdale, AZ

From all-groundwater to mostly Colorado River

Before the 1980s Scottsdale ran entirely on groundwater. Its 2026 water quality report says that in 2025 the mix was 71 percent Central Arizona Project water, 13 percent Salt River Project water, 8 percent groundwater from 21 active wells and 8 percent recycled. CAP water is treated at the Water Campus in the north of the city; SRP water goes to the Chaparral plant near Hayden Road and McDonald Drive. The report lists hardness by area at about 13 to 15 grains south of Indian School Road and 13 to 17 grains from there northward. A separate city hard-water fact sheet lists much higher figures, up to 25 grains in the south, a reminder that the number moves as the source blend changes.

McCormick Ranch and south Scottsdale

McCormick Ranch dates from 1970, when Kaiser-Aetna bought roughly 4,236 acres from the McCormick family, and it grew into one of the largest planned communities in Arizona, with seven man-made lakes and the Indian Bend Wash greenbelt running through it. Its early houses are now past fifty. South of Indian School the housing is older still. In both areas the supply lines under the floor have carried hard water for decades, which is the slow wear behind a lot of pinhole leaks. When one appears, we find it with acoustic and thermal leak detection before any tile is lifted.

Your smart meter may flag it first

The city reports its automated meter rollout at 78 percent complete, with more than 61,000 meters upgraded, and over 18,000 customers using the WaterSmart portal, which sends leak alerts. A continuous-use alert on a house where every fixture is off is exactly what a slab leak looks like on a meter. Take a screenshot of the hourly graph; it helps us confirm the leak is on the house side. Depending on how many times the home has leaked, the answer is a spot repair through the floor or a repipe.

Next door

Scottsdale wraps around Paradise Valley and meets Tempe at its southern end, and we cover both on the same routes.

Scottsdale slab leak questions