A Flume will let you monitor water usage. It detects leaks and surges such as if a sprinkler head breaks off. It can pay for it's self detecting a major leak.
Flume Water | Smart Home Water Monitor | Water Leak Detector
Self-install in under 10 minutes. No plumbing necessary!
Detect leaks and get notified immediately.
Monitor and manage your water use—indoors and out.
Break down your water use by individual household appliances and water fixtures.
Save money and conserve water with custom budgets and leak alerts.