There is still no explanation behind skyrocketing water bills across the City of San Diego. Since News 8’s “Your Stories” investigation first aired last month, city officials have requested an audit of the Public Utilities Department – which also launched its own probe into the issue – but some residents believe the new “smart meters” might be to blame. Jim Narvaez replaced his water guzzling lawn with artificial grass – so imagine his surprise when his water bill went up.