When a Temecula main fails, it can surprise people in a newer house, and the signs read the same as anywhere, the wet patch that persists, the meter moving with everything off, the pressure that sagged house wide, the bill that jumped.
Following the line out from the meter and using locating gear helps find the trouble, and in a younger line it could be a fitting that was the build's weak point or a length of pipe deformed by soil movement or roots. The fix matches the finding, a repair at the failure point when the rest of the run looks sound, or a bigger conversation when the evidence calls for it, with trenchless methods available where open trenching would set back a mature backyard by years.
The leak keeps running up the bill, and saturated ground can stress hardscape and slab alike. You get plain English answers, the real tradeoffs, and findings worth keeping on file, you choose at your own pace, and a licensed contractor performs the work when you say go.