You got donged with fresh water, me with storm water!
Yesterday a guy in a hi vis jacket and wearing headphones walked our street opening the toby cover and putting a wand down. Sound like a leakage survey?
Wonder how they tell water flow is leakage or just from a tap running in the house?
Last time we had an issue thought to be a water (mains) leak under our driveway, the guy using sonic detection methods was "fairly sure" he'd located a leak. It took quite an effort digging up the driveway, exposing and inspecting the pipe, filling, compacting, and re-sealing to be "fairly sure" he was quite wrong.