Retired US Navy ('81-'05) now owner of Utility Testing and Geographic Systems LLC- a small water and gas line inspection, testing and mapping service.
To the best of our knowledge, we are the only firm in the US that provides municipal-wide water leak / gas leak prevention services. Yes, we are aware of companies that can provide spot or localized testing services, but we typically can test 15-20 miles of distribution system piping with a 2-person crew every work shift.