The off test
Set the controller to off, close hose bibs, and do not run a faucet. If the meter still turns, the leak is under pressure all the time: a main line, a stuck valve feeding a broken head, a slab leak, or a toilet. If the meter is still and the bill was high only on watering days, the loss is happening while a station runs.
What we repair
We take the irrigation half: mains, laterals, valves that will not close, and heads that run after the clock has moved on. Call 346-642-6161 and say what the meter did with the system off.